Alan C.

Has anyone had issues with oil galley plugs blowing out after a rebuild? Specifically the one on the rear of the engine. I'm dealing with one and don't have a clue. All of the plugs were removed to insure that there was no debris left in the oil system. Used a new plug and staked the block. Plug blew out about 2 min. after startup. Pulled the engine and put in a new plug. Same thing.

This would kill a mechanic on a flat rate job.

Thanks for any help.

RedlineMan

Hmmm...

To be honest, I have no experience with them at all.

You didn't happen to note what the pressure readings were at the time of failure, I don't suppose? I know... who would anticipate THIS failure. Just a thought. You'd think it might attack other areas as well if the pressure relief valve was not functioning correctly.

Obviously there seems to be something about that galley hole or the plugs being used. It seems to me that short of finding that the hole was compromised or the plug out of spec., I think I might be helping it stay put with some JB weld or Loctite bearing setter.

Wierd!

Brian Morris

Here's Rob Langley's experience with oil galley plugs blowing out. They thought the problem was bad sealant.

http://www.986.org/sites/944faqs/Rob...ter21Part3.htm

--Brian Morris
89 951

Alan C.

John, Brian
Thanks for the thoughts. I believe it has something to with the dimensions of the plug. The car was at idle both times with a pressure of about 3.5 - 4 bar cold. I can't believe that Porsche sells a great deal of these plugs. So if there were was a bad run it would take some time to figure it out. I think I'll fabricate a punch with a about a 6 degree taper to tap into the plug and expand it a bit before I install the next one. Of course the plug is now on backorder.

John,
I know the two previous owners of the car in your avatar. I was at Sebring when Jochen had a heated discussion with Springer on the cost of 2 evo doors which didn't fit too well. It was funny to say the least. Jochen lost as one might imagine.

Geo

Would it be possible to tap the block for a threaded plug?

Van

I'm not familliar with that plug, but perhaps the oil relief valve isn't working, and built up too much pressure?

Al P.

Yes, aluminum 3/4" pipe thread plugs, available from your local speed shop, can be made to work.

Alan C.

A tapped plug sounds like a good fix. I'll look at that along with a slight mod to the taper of the new plug when it shows up.

Thanks all,

RedlineMan

Pipe Plug...

Of course! But... That doesn't answer the question, does it? How stubborn are you, Alan?

Alan C.

John, Somnetimes to a fault