360

Ok here's the first of two posts on the oil galley plugs as it is too big to put all in one post.

These two are in the front of the block that go behind the camshaft thrust plate. Some people claim that their engines did not come with them (even from the factory), and say that you do not need them.

On the very first engine that I rebuild, a 340, the machine shop did not install these after doing the machine work. I would start the engine and only get 25 psi cold and it would drop below 10 psi when warm idling at 1000 RPM. After pulling the engine 4 times, I took some advice from an "old timer" with lots of experience. He told me to spin the oil pump with a priming shaft and look for oil gushing out and that is where you are loosing your pressure. I finally found it was coming out from behind the camshaft thrust plate. When I removed it, the plugs were not there. I put them in and the pressure was back above 55 psi cold start and when warm. So to me, I swear by these and always check to make sure that they are installed. I do not trust the camshaft thrust plate to hold them from leaking and loosing pressure. Some people say that they are not needed, They can do what they want with their engines. I strongly recommend that you use them from my experience, I would rather be safe than sorry. How would you like to suddenly loose oil pressure while driving down the road someday.

Mancini racing also sells a "kit" with all of the oil galley plugs and all of the freeze plugs to replace all of them in the engine. The oil galley plugs behind the camshaft thrust plate are not commonly stocked by parts stores and can be difficult to find in some parts stores. Like I said, call Mancini...

OK here is the two oil galley plugs behind the camshaft thrust plate:

View attachment 360 front face A01 B2.jpg

Here is a close up view of them:

View attachment 360 front face A03 B2.jpg

Here is a view showing the oil galley plug behind the oil filter plate or oil filter adapter on the passenger (right) side of the block:

View attachment 360 oil galley plug filter A02 B2.jpg