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philman
04-15-2010, 06:37 AM
I've seen high volume oil pumps listed for the buick 300ci V8 and 238 ci V6. They also say good for the 215. Are they a direct fit for our 3.5V8 or is there more involved like changing the distributor drive gear etc?

philman
04-24-2010, 04:20 AM
Another related question....

Will the 3.5 liter timing cover fit properly on a newer 3.9 liter block?

Dan Jones
04-24-2010, 08:20 AM
> I've seen high volume oil pumps listed for the buick 300ci V8 and 231 ci V6.
> They also say good for the 215. Are they a direct fit for our 3.5V8 or is
> there more involved like changing the distributor drive gear etc?

The high volume oil pump kits are simply deeper pump gears with a spacer
plate. The ones designed for the Buick 215 and 300 will not fit the SD1/TR8
because the oil pump cavity depth in the aluminum timing cover is different
so the spacer will not be the correct depth. The TR8 oil pump has deeper
gears than a Buick 215 or 300 but a Buick 215 or 300 with HV kit is deeper
still. In order of depth:

Buick 215/300/pre-SD1 Rover V8
SD1/TR8 Rover V8
Buick 215/300/pre-SD1 Rover V8 with spacer plate

For most purposes, you shouldn't need deeper gears than the TR8 Rover V8.
A Ruggles-type booster plate (if Woody doesn't carry them, they are available
from TA Performance) and an externally adjustable pressure relief valve will
give you all the pressure you need. That's what I have on my TR8 and I can
set cruise oil pressure anwhere I want it.

When mixing and matching Buick and Rover oil pumps and distributor drive ends,
there is also the issue of male versus female ends.

> Will the 3.5 liter timing cover fit properly on a newer 3.9 liter block?

Yes. Be aware the TR8 and Rover SD1 timing covers are unique and
rather scarce in the United States. Buick 215/300/340/V6 covers
all bolt on but have various differences (accessory bosses, oil
pump cavity depth, oil filter location, number of water pump bolts,
front seal, etc.).

Dan Jones