Re: V8 oil Pump ID?

Posted by BH On 2012/3/5 12:08:47

Good eyes!

The small hole in the second design valve is probably needed because the end of the bore is plugged in that pump. Perhaps this feature corresponds to the "V" grooves that were cut in the original valve for the confidential field trial (where they plugged the relief valve bore on some of the first design pumps).

Of course, that hole is not needed (nor should it be attempted) with the a relief valve bore that's open to the crankcase - even with sump tube.

However, I'm still not sure what the purpose of the recess is on that second design valve.