Crankshaft oil gallery end plugs.

looneytunes · looneytunes's Garage

Hi from England. I have a 1976 Carrerra 3.0. I am in the process of stripping the engine for a refresh. I have had this slight oil leak which drips onto the heat exchanger causing smoke. Embarrassing and annoying. I think I have traced it to the cam tower to heads join. On strip down I have noticed the crankshaft oilway end plug has also been leaking. Can I replace these plugs myself or would I need to leave it with a machine shop? Do Porsche supply these and what is the part number? Would it be a case of crankshaft in the oven, plug in the freezer then fit? How do the machine shop actually fit them. Once done is it worth JD weld also? Thanks in advance for any ideas.

porschedude996 · porschedude996's Garage

The plugs are available from porsche. You can check out the part numbers on the porsche maintained parts manual in pdf form. To get them out is a bit tricky. One that have direct access from behind can be driven out. Others would require one to drill and tapp the plug to be (small) slide hammered out. New ones can be installed using Loctite 574. Ones that a cup like, can be drilled and pried out, be careful not to hit the sealing surface. Those can be sealed with JB Weld on the sealing surface going in and the top sealed with same.

Catalog: https://www.porsche.com/usa/accessoriesandservices/classic/genuineparts/originalpartscatalogue/

looneytunes · looneytunes's Garage

Hi Porschedude, are you talking about the crankshaft plugs or the crankcase plugs which I know are available?

stownsen914 · 08-09-2024, 10:46 AM

What was the evidence that a crankshaft plug was leaking? And which end?

porschedude996 · porschedude996's Garage

Quote:

Originally Posted by stownsen914

What was the evidence that a crankshaft plug was leaking? And which end?

I agree with the likelihood that it isn’t a plug. If you are going through the engine, removing the plugs to clean and inspect the galley's is a good thing. I would venture to guess it would be a higher probability that your leak is the Tri-Angle of Death, or the rocker shafts. I would think you already looked at the oil return tubes.