200 ENGINE ASSEMBLY

Other changes include the use of new shouldered oil pan bolts which bottom on the cylinder block rather than the oil pan, and rubber isolators installed between the heads of the pan bolts and the oil pan. Together, these isolators and the isolating gasket eliminate metal-to-metal contact between the bolts and the oil pan, significantly reducing the amount of engine vibration transmitted to the pan.

The illustration below, Figure 6-54, shows both the fiber oil pan gasket arrangement and the new isolating gasket arrangement.

200 Engine Assembly

With the new isolating oil pan gasket arrangement, the mounting holes tapped into the cylinder block, timing gear cover, and flywheel housing are now 8 mm rather than 10 mm. The illustration below, Figure 6-55, shows the newer production arrangement.

The fiber oil pan gasket can be used on engines with either 8-mm or 10-mm tapped mounting holes. The isolating oil pan gasket may only be used on cylinder blocks with 8-mm tapped holes.

ASSEMBLY A (BOLT)

A SHOULDER BOLT – 421GC289M (20 BOLTS)

OIL PAN ISOLATOR – 41GC212 (20 ISOLATORS)

ASSEMBLY B (STUD)

B

SHOULDER STUD – 616GC239M (10 STUDS)

STUD NUT – 189AM1 (10 NUTS)

OIL PAN ISOLATOR – 41GC212 (10 ISOLATORS)