Revision Corvette ZR-1 model year 1990 #125

[Thomas ZR-1]

As usual the assembling started with the empty crank case on the engine stand.

[Thomas ZR-1]

Crankshaft, base frame and the new main bearings were ready for the installation.

[Thomas ZR-1]

...and installed:

[Thomas ZR-1]

The eight pistons with rods and a set of new rod bearings followed.

[Thomas ZR-1]

Following that the oil pan unit and the engine mounts were fitted next.

[Thomas ZR-1]

Next followed the oil pump installation including new O-rings.

[Thomas ZR-1]

An important detail of the LT5 is the chain guide drive facings. They had worn out a lot during the past 30 years (and they love to break away sometimes). All the facings were not so bad at all but were fitted in new regardless. The reused chains were only stretched minimal (normally they are good for 150 miles).

[Thomas ZR-1]

Now the cylinder heads could be installed. The cylinder head bolts (in size M14x1.5) were used again (final torque specification: 160 Nm).

[Thomas ZR-1]

Next the 4 camshafts and the bucket tappets were installed.

[Thomas ZR-1]

Special measuring tools were installed for the camshaft timing.