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Encyclopedia > Ford 335 engine
Ford 335 V8
351 Cleveland V8 in a 1969 Ford Mustang
Manufacturer Ford Motor Company
Also called: Ford Cleveland V8
Type: 90° V8
Production: 1970–1982
Predecessor: Ford FE V8
Successor: Ford Windsor V8
Bore: 4.0 in
Stroke: 3.0 in
3.5 in
4.0 in
Displacement: 302 in³
351 in³
402 in³
Block alloy: Iron
Head alloy: Iron
Valvetrain: OHV

The Ford 335 engine family were a group of small-block V8 engines built by the Ford Motor Company between 1970 and 1982. The series was nicknamed Cleveland after the Cleveland, Ohio engine plant in which most were cast. The 335 was designed as a mid-sized engine to replace the larger members of the Windsor small-block family as well as the mid-sized FE V8 family. Both of these engine families continued in production, however, with the Cleveland only outliving the FE by a half-decade and eventually abandoned in favor of the more compact Windsor design. Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 163 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Automakers, also known as carmakers, automobile manufacturers, motor manufacturers, or the automobile industry are companies that design and manufacture automobiles. ... “Ford” redirects here. ... The Liberty V8 aircraft engine clearly shows the configuration, although modern automotive versions use a 90 degree block angle. ... The Ford FE engine was a Ford V8 engine used in vehicles sold in the North American market between 1958 and 1976. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... One complete cycle of a four cylinder, four stroke engine. ... A colorized automobile engine The internal combustion engine is an engine in which the combustion of fuel and an oxidizer (typically air) occurs in a confined space called a combustion chamber. ... A small-block engine is a North American V8 in a family of engines which generally have less than 6 liters (360 cubic inches) of displacement, although some derivatives have grown larger (up to 400 cubic inches, 6. ... The Liberty V8 aircraft engine clearly shows the configuration A V8 engine is a V engine with eight cylinders. ... “Ford” redirects here. ... Cleveland redirects here. ... Cleveland Engine is a Ford Motor Company engine manufacturing facility in Brook Park, Ohio, a suburb of Cleveland. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... The Ford FE engine was a Ford V8 engine used in vehicles sold in the North American market between 1958 and 1976. ...

Contents

Overview

The 335 series was very different internally from the similar-looking Windsor series. The 335 Cleveland used smaller 14 mm spark plugs in one of two different cylinder heads, both with 2 valves per cylinder. The 4V heads had massive valves canted to the sides with a "poly-angle" combustion chamber. A novel feature of the engine is that the heads appear to twist, that is that the engine to head surface is not parallel to the valve cover surface — installed the heads are at an angle while the more horizontal valve cover surface has the covers extending mostly vertical. This allows for a narrower engine profile. These covers are secured with 8 bolts, as opposed to 6 on the Windsor.


A simple differentiator between the Windsor and Cleveland series is the location of the radiator hose — the Windsor routed coolant through the intake manifold, with the hose protruding horizontally, while the Cleveland had a dry manifold with the radiator hose connecting vertically to a separate timing chain cover.


Inside the block, large main bearing caps are specified for durability, allowing 4-bolt mains on some engines. The oiling system has been widely criticized but has not proven any less reliable than the Windsor line.


351 Cleveland

351 Cleveland engines
Code Engine type Years Compression Notes
H 351C-2V 1970-1974 Low
M 351C-4V 1970-1971 High
R 351C-4V "Boss 351" 1971 High Very rare, solid lifters
R 351C-4V HO 1972 Low Very rare, solid lifters
Q 351C-4V "Cobra-Jet" May 1971-1974 Low
See also the Cleveland-derived Boss 351 and quite different 351 "Windsor"

The 351 Cleveland was introduced in 1969 as Ford's new performance car engine and was built through the end of the 1974 model year. It incorporated elements learned on the 385 big-block series and the Boss 302, particularly the poly-angle combustion chambers with canted valves and the thin-wall casting technology. The Ford Boss 351 is a modified 351 in³ (5. ... The Ford Boss 351 is a modified 351 in³ (5. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... Boss 429 engine The Ford 385 engine family was the American Ford Motor Companys final big block V8 engine design, replacing the Ford MEL engine and gradually superseding the Ford FE engine family. ... The Boss 302 engine is a racing small-block V8 from Ford Motor Company. ...


Both a 4V (4-barrel carburetor) performance version and a 2V (2-barrel carburetor) basic version were built, both with 2 valves per cylinder. The latter had a different cylinder head with smaller valves, smaller ports, and open combustion chambers to suit its intended applications.


Only the Q-code 351 "Cobra Jet" (1971-1974), R-code "Boss" 351 (1971), and R-code 351 "HO" (1972) versions have 4-bolt mains although all 335 series engines (351C/351M/400) have space for them even in 2-bolt main form. The main difference between 351W/351C/351M/400 engines is connecting rod length and main bearing size. The 351M/400 engines have the largest bearing size and the tallest deck height while sharing the 429/460 bell housing pattern. The 351C engine has a medium main bearing size and shorter connecting rods than the 351W and the 351M/400 while retaining the SBF engine mount locations and bell housing pattern. The 400 engine has the longest stroke of any SBF or 335 series engine. The bell housing is part of the transmission system on a petrol or diesel powered vehicle. ...


All of the 351C and 351M/400 engines differ from the 302/351W by having an integrated timing cover casting in the front of the block to which the radiator hose connects.


H-code

1973 H-code 2V 351 Cleveland
1973 H-code 2V 351 Cleveland

The majority of 351 Cleveland engines are H-code 2V (2-venturi carburetor) versions with low compression. These were produced from 1970 through 1974 and were used on a variety of Ford models from compact to intermediate. Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 194 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1024 × 768 pixel, file size: 194 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...


M-code

The M-code version was produced from 1970 through 1971. Both years offered quench heads but 1970 offered a slightly higher (advertised) 11.4:1 compression ratio whereas in 1971 the chamber was opened up slightly reducing the advertised compression to 10.7:1. The 1970 4V head is identified with the proper date code casting and a "4" cast on the upper corner of the head. The 1971 4V head is identified with a "4*" (four-dot) casting at the same location. Hydraulic lifters were also specified, with the M-code producing about 300 hp (224 kW). 2-bolt main caps were used along with a cheaper cast iron intake manifold. Bold text The compression ratio is a single number that can be used to predict the performance of any engine (such as an internal-combustion engine or a Stirling Engine). ...


1971 R-code (Boss 351)

See also Ford Boss 351 engine

The 1971 R-code "Boss 351" used higher compression (11.7:1) with the quench head 4V heads, solid lifters, an aluminum intake manifold, and 4-bolt main caps. It produced about 330 hp (246 kW). The Ford Boss 351 is a modified 351 in³ (5. ...


1972 R-code

The R-code 351 Cleveland for 1972 was considerably different. It had reduced compression for emissions compliance and used open-chamber heads. It had a Hydraulic camshaft, however a four barrel carburetor was retained. It produced 400 hp (207 kW) using the new SAE net system.


Q-code (Cobra-Jet)

The Q-code "351 Cobra Jet" version was produced from May 1971 through the 1974 model year. It was a low-compression design that included open-chamber "4V" heads, a special intake manifold, special hi-lift long duration hydraulic camshaft, special valve springs and dampers, a 750 CFM 4300-D Motorcraft Carburetor, dual-point distributor, and 4-bolt main bearing caps. It was rated at 266 hp (198 kW) (SAE net) for 1972 when installed in the Mustang and 248 hp in the Ford Torino and Mercury Montego. The rating remained 266 hp for the Mustang and dropped to 246 hp (183 kW) for the intermediate Ford and Mercurys for 1973. The 351 CJ was rated at 255 hp in 1974 and was only installed in the Ford Torino, Mercury Montego and the Mercury Cougar. For other Ford Mustang models and concepts, see Ford Mustang Variants. ... The Ford Torino was an intermediate sized car produced by the Ford Motor Company for the North American market between 1968 and 1976. ... Wikimedia Commons has media related to: Mercury Montego The Mercury Montego, (presumably derived from Montego Bay, Jamaica) was a mid-size vehicle in Fords Mercury line. ... The Ford Torino was an intermediate sized car produced by the Ford Motor Company for the North American market between 1968 and 1976. ... Wikimedia Commons has media related to: Mercury Montego The Mercury Montego, (presumably derived from Montego Bay, Jamaica) was a mid-size vehicle in Fords Mercury line. ... The Mercury Cougar was an automobile sold under the Mercury brand of the Ford Motor Companys Lincoln-Mercury Division. ...


302 Cleveland

Note that there was also a 302 "Windsor"

This engine was built only in Australia, and was intended to give their consumers a five liter alternative to the 351 Cleveland as the Ford "Windsor" series of engines was not commonly available there. Utilizing a locally produced 351 Cleveland block, 302 in³ (5.0 L) was attained by reducing the stroke of the 351C from 3.5 to 3 inches (89 to 76 mm). Additionally, the 302C cylinder heads were designed locally, with smaller combustion chamber to compensate for the reduced stroke of the engine. The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ...


This combination of closed combustion chambered quench heads with smaller 2 barrel style ports made a more powerful setup known in the USA as "Australian heads". These heads interchange directly onto 351C engines, and are highly sought outside of Australia as a low-cost method to increase compression ratio. They are a good street alternative to the over ported 4 barrel heads. Using the 302C cylinder heads on an otherwise unmodified 351C will increase the compression ratio beyond a safe level for regular pump fuel. Using the small chamber 302C cylinder heads properly requires engine design changes (deck clearance, piston design, cam shaft specifications) optimized for the intended use.


400

The big-block FE engine family was getting rather tired and outdated, and the 385 family could not meet the efficiency requirements of the time. At the same time, the small-block Windsor engines were too small and high-revving for Ford's fullsize car and truck applications. So the company went to work on a new small-block to meet the desired levels of economy while still providing the kind of big-block torque that was needed to move 2+ ton vehicles. A big-block engine is a North American V8 in a family of engines which generally have greater than 6 litres (360 cubic inches) of displacement; factory engine sizes reached a peak of 8. ... The Ford FE engine was a Ford V8 engine used in vehicles sold in the North American market between 1958 and 1976. ... Boss 429 engine The Ford 385 engine family was the American Ford Motor Companys final big block V8 engine design, replacing the Ford MEL engine and gradually superseding the Ford FE engine family. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... A full-size car is term used in North America for an automobile larger than a mid-size car, usually having a wheelbase greater than 2. ...


The Ford 400 engine was based on the 351 Cleveland but was produced with a 1 inch taller deck height to allow for a crankshaft with a longer stroke. The 400 also featured larger main-bearing journals and had "square" proportions, with a 4.0 in (102 mm) bore and stroke; it therefore displaced 402 in³ (6.6 L), making it the largest small-block V8 made at that time. It was introduced in model year 1971 with a full half-inch (12.7 mm) longer stroke than the 351 Cleveland, making it the longest-stroke Ford pushrod V8 engine. A long-stroke engine has good low-end torque. This was a good compromise given Ford's requirement for an engine to power heavier mid-size and full-size cars and light trucks. The M-block, as it later became known, was the last pushrod V8 block designed by Ford. The M-block also shares some elements with the Windsor engine family: bore spacing, cylinder head bolt-patterns and crankshaft journal dimensions.[1] Stroke ratio, bore/stroke ratio and stroke/bore ratio are terms that are used to describe the form of a piston engines cylinder when the piston is at the lowmost point. ... One complete cycle of a four cylinder, four stroke engine. ... For other uses of the term, see Small block (disambiguation). ... The Liberty V8 aircraft engine clearly shows the configuration A V8 engine is a V engine with eight cylinders. ... The model year of a product is a number used to describe approximately when a product was produced. ... It has been suggested that this article or section be merged with Cam-in-block. ...


The 400 was seen as a smaller and lighter replacement for the big Ford 385 engines, the 429 and 460, in Ford's big cars. Weighing just 80% of a similar big block, it was originally available in Ford's Custom, Galaxie and LTD lines, and in Mercury's Monterey, Marquis, and Brougham. Later, it would power the Ford Thunderbird, the Lincoln Continental, Mark V, mid-size Fords and Mercurys, and Ford light-duty trucks. Boss 429 engine The Ford 385 engine family was the American Ford Motor Companys final big block V8 engine design, replacing the Ford MEL engine and gradually superseding the Ford FE engine family. ... The Ford Custom is a car model name that has been used by the Ford Motor Company both in the United States and Canada from the 1930s to 1972. ... 1966 Ford Galaxie 7 Litre Wikimedia Commons has media related to: Ford Galaxie For other uses, see Galaxie (disambiguation). ... It has been suggested that this article be split into multiple articles accessible from a disambiguation page. ... Mercury is an automobile marque of the Ford Motor Company founded in 1939 to market near-luxury cars slotted between entry-level Ford and luxury Lincoln models, similar to General Motors Buick (and former Oldsmobile) brand and Chryslers Chrysler brand. ... The current Mercury Monterey minivan is the Mercury variant of the 2004 Ford Freestar. ... Categories: Possible copyright violations ... The Mercury Brougham was the companys flagship model during its two year run from 1967-1968. ... The Ford Thunderbird was a car manufactured in the United States by the Ford Motor Company. ... Lincoln is an American luxury automobile brand, operated under the Ford Motor Company. ... The Lincoln Continental, an automobile produced by the Lincoln division of Ford Motor Company, began for the 1939 model year. ... Categories: Stub | Lincoln vehicles ...


The vast majority of 400 blocks use the same bellhousing bolt pattern as the 385 family big-block to make it compatible with the higher torque-capacity C6 transmission used on the large cars and trucks. There were a small number of 400 block castings that use a "small block" pattern on the rear for mounting an FMX transmission. These castings are rare. The 400 was modified in 1975 to use unleaded gasoline. The bell housing is part of the transmission system on a gasoline (also known as petrol) or diesel powered vehicle. ... Boss 429 engine The Ford 385 engine family was the American Ford Motor Companys final big block V8 engine design, replacing the Ford MEL engine and gradually superseding the Ford FE engine family. ... The Ford C6 transmission was a heavy-duty automatic transmission built by the Ford Motor Company between 1966 and 1996. ... Year 1975 (MCMLXXV) was a common year starting on Wednesday (link will display full calendar) of the Gregorian calendar. ... Gasoline, as it is known in North America, or petrol, in many Commonwealth countries (sometimes also called motor spirit) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ...


351 M

Engine dimensions
351M/400 351C
Nominal main bearing size 3.000 in (76.2 mm) 2.7149 in (69.0 mm)
Rod length 6.58 in (167.1 mm) 5.78 in (146.8 mm)
Deck height 10.297 in (261.5 mm) 9.206 in (233.8 mm)

When the 351 Cleveland was withdrawn after the end of the 1974 model year, Ford needed another engine in the 351 cubic inch (5.8 L) class, since production of the 351 Windsor was not sufficient and the 390 FE was being retired as well. To replace the 390, Ford took the 400 engine's tall-deck block and de-stroked it, with the shorter throw crankshaft from the 351 Windsor, and taller pistons, to produce a 351 cubic inch (5.8 L) engine whose components were largely compatible with the 400. This engine was called the 351M and as a back-formation the taller-deck block became known as the M-block. These engines were built in Cleveland, and the performance reputation of the 351 Cleveland engine was such that the company continued to refer to "351 Cleveland" in marketing for a couple years after the change. Year 1974 (MCMLXXIV) was a common year starting on Tuesday (link will display full calendar) of the 1974 Gregorian calendar. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... The Ford FE engine was a Ford V8 engine used in vehicles sold in the North American market between 1958 and 1976. ... Crankshaft (red), pistons (gray) in their cylinders (blue), and flywheel (black) Continental engine marine crankshafts, 1942 Components of a typical, four stroke cycle, DOHC piston engine. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ... For the American composer, see Walter Piston. ...


Light truck usage

For the 1977 model year, Ford decided to replace its aging FE big-block 360 and 390 engines in its light truck line with its new 351M and 400 engines. For light truck use, beefed-up blocks were designed. These enhancements were added to all M-block engines starting with the 1978 model year. The model year of a product is a number used to describe approximately when a product was produced. ... The Ford FE engine was a Ford V8 engine used in vehicles sold in the North American market between 1958 and 1976. ...


Replacement in cars

1979 was the final year the M-block engines were used in cars. After that, the Ford 351 Windsor at 5.8 L was the only large car engine used. Reduced demand for large engines due to fuel economy regulations led to the abandonment of the Cleveland production line that produced the 351M and 400 engines. The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ...


Replacement in trucks

The M-block engine was designed when first-generation pollution controls were already in place. Most Ford V8s required bulky and unsightly external tubing to feed Thermactor air into the exhaust manifolds and exhaust gas to the EGR valve below the carburetor, but this was all built in to the M-block engine. Bendix-Technico (Stromberg) 1-barrel downdraft carburetor model BXUV-3, with nomenclature A carburetor (North American spelling) / carburettor (international spelling), colloquially called a carb (in North America and the United Kingdom) or carby (chiefly in Australia), is a device that blends air and fuel for an internal combustion engine. ...


This all made adapting the M-block to the second generation of emissions control equipment harder. One requirement of the second-generation equipment was an oxygen(O2) sensor in the exhaust, which had to be placed before the Thermactor air was added. Since Thermactor air was injected right into the block's exhaust ports in the M-block, there was nowhere for the O2 sensor to go.


It would have been possible to alter the M-block to work, but it would have required significant effort and cost. Ford decided to simply scrap the M-block engines and replace them with updated 351 Windsor engines at the small end, and a combination of the 6.9 L Navistar International diesel and the 460 at the top end. 1982 was the last year the M-block was sold. It has been suggested that International Harvester be merged into this article or section. ...


See also

Boss 429 engine The Ford 385 engine family was the American Ford Motor Companys final big block V8 engine design, replacing the Ford MEL engine and gradually superseding the Ford FE engine family. ... Ford Engines Fords engines are well known throughout the world, not only in Ford vehicles but in aftermarket, sports, and kit applications. ...

External links

  • Short descriptions of Ford overhead valve V8 engines
  • M-Block Ford V8 Workshop

Sources

  • [? Ford 351 Cleveland Engines - Key Facts & Information]. Ebay.com. Retrieved on August 27, 2006.

is the 239th day of the year (240th in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ...

References

  1. ^ Geoff Infield's Ford V8 page. Retrieved on July 25, 2006.

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