HZJ70 Chev V8 Diesel

NOTE: late 78 series vehicles fitted with naturally aspirated 1HZ diesels are fitted with a R151 size gearbox this gearbox we consider to be marginal in strength. If you are considering a V8 conversion it should be replaced with a gearbox from a 4.5 petrol.

Bellhousing

The HZJ7# Manual - GM V8 Kit part no. MFK1060CD utilises the Toyota bellhousing, instead of a replacement bellhousing, a flywheel housing is supplied which measures 61 mm/2.4" long. This housing has the GM bolt pattern on the front and the Toyota 1HZ, bolt pattern on the rear.

The new flywheel supplied in the kit accepts the original Toyota 11" clutch. The flywheel is offset to the rear to place the clutch in its original position. The flywheel has no ring gear and must be used with the original GM flex plate and ring gear. Spacers and bolts are supplied to fix the flex plate to the back of the flywheel.

Engine Mountings

Weld in Mounts

The engine mounting kit MFK915/CK to suit the 7# series Land Cruiser consists of engine block brackets, engine-mounting rubbers, and bolts. The original Toyota chassis brackets are welded to the chassis and must be cut off with a grinder to make room for the new brackets. The new brackets must also be welded to the chassis, if you're not a good or qualified welder, we suggest a contract welder do the job.

Heavy Duty Rebuildable Engine Mounting Rubbers

Marks 4WD Adaptors now manufacture heavy duty rebuildable engine mounting rubbers using urethane bushes. Click here for details.

Bolt in Mounts

Marks 4WD Adaptors now manufacture a bolt in engine mounting kit to suit the HZJ7# models. This kit utilises the Toyota chassis brackets and the Toyota engine mounting rubbers, the kit consists of

Accessories

When fitting the 6.2 or 6.5ltr diesel with this conversion kit the GM engine accessories may be used, for example the A/C compressor, power steering pump and alternator. Note: The original GM water pump with a single serpentine belt is a reverse direction pump. Alternatively the Toyota accessories could be adapted to fit the new engine.

Air Cleaner Adaptor

Chevy diesel engines are usually fitted with an air cleaner that looks similar to the type fitted to Chevy petrol carburettor engines. This type of air cleaner will require modifications to allow it to be used with a snorkel. To over come this problem Marks 4WD Adaptors now manufacture a cast aluminium hat that takes the place of the GM air cleaner. The inlet takes a 3 1/2" hose and will fit directly to a late model Toyota air cleaner hose, should you have an early model air cleaner with a 3" outlet a rubber adaptor hose can be used. These parts can be purchased separately or as a complete kit.