oil leackage between head and camshaft

[ggraaf]

Hello,
I found a large oil puddle of 0.5L to 1L on the floor below my converted 914 with a 3.0L motor from a Porsche 911 SC, 1978. I already renewed the valve cover seal, but this did not seem the cause of this river. The oil cooler which is mounted on the motor is completely dry. Closer inspection reveals that the oil comes from nearby cylinder #6, between the camshaft and the cylinder head, just at the left where '5' is printed on the casting piece.



Can somebody give me some suggestions what is the cause of this leakage?

Thanks, Gerber

[Flat6pac]

With the quantity of oil you're loosing, I would look at the rocker shafts, especially exhaust rocker shaft being off location.
Bruce

[proporsche]

Hi..as Bruce said the rocker pins ..but i think it might be that it is leaking between the cylinder head
and camshaft housing..like here where is the loctite 574..You might not have it there any longer.

Ivan

[ggraaf]

Hi Bruce and Ivan,
Thank you very much for your replies.

Further looking on the web, I think the leakage might origin from the 'dry chamber' at the lower part of the camshaft housing.

I hope Bruce is right, so I probably can repair the leakage without taking the motor out of the car, though there is very few room for working there on the 914. I think only the oil cooler will have to be removed in order to access the rocker shaft screw of cylinder #6. If Ivan is correct, it will be a complete different story and a top rebuild will be necessary. In case the loctite between head and camshaft housing is failing, might a loose head strut be the cause of this?

Though I just went through the book of 'How to Rebuild and Modify Porsche 911 Engines' from Wayne Dempsey, I do not have much experience in working on the 911 motor. A new challenge!

Greetings, Gerber

[proporsche]

Hi Gerber...there is no danger with this oil leak just pain in a ass to have drips on floor.Do this job (if it comes to it ) only when you are ready to take the engine a part...no you will not loose any engine case studs...
Just clean the engine on car wash once a awhile...so it does not build on your exhaust..

Ivan

[proporsche]

.......

[DRACO A5OG]

Gerber,

It can also the return tubes, as suggested, wash the engine to determine where it is really coming from. It could be a combination of both.

Next valve adjust, check the shafts are in the proper places and check the torque, uses RSR bottom seals if needed.