While i'm there - cis removal

[prebordao]

I will remove the whole CIS setup in the next weeks.
While having complete access to the top of the engine, what gaskets should i replace to minimize / stop the typical oil leaks ?

Tks

[tirwin]

The main thing on top of the engine is the typical "triangle of death".

You should check the boots on the intake runners and the o-rings and sleeves on the fuel injectors at a minimum. It is a slippery slope though. One minute you're replacing a simple gasket and the next minute you're disassembling the engine.

[prebordao]

I've heard about the triangle of death... but what gaskets should I have ready, just those oil-related...

[wachuko]

Originally Posted by prebordao

I've heard about the triangle of death... but what gaskets should I have ready, just those oil-related...

Remove bottom oil drain cover, clean all of it and use two new gasket.











If you tackle the oil cooler... there is a bulletin on some fixes there as well to avoid leaks. Preventive fill of the area behind the engine oil cooler as per the bulletin...



Oil seals. It was suggested to put some Loctite 574 on them to make sure there were no leaks... a little is enough...do not over do it...



Attacking the triangle of oil leaks... again... some little bit of Loctite 574 on the gaskets as well... DO NOT PUT Loctite 574 on the o-rings... only on both sides of the gaskets... just making sure that was clear

It is this O-ring, the oil breather cover gasket, and the sensor (seal and actual sensor...the sensor itself is a source for leaks)...





Triangle of leaks done!

[prebordao]

Thanks !

[wachuko]

Originally Posted by prebordao

Thanks !

Also, if you do not have it... download the parts catalog for your car... here is the link for the USA cars... but this is free and available from the Porsche website...

http://www.porsche.com/all/media/pdf/originalparts/en/E_911_77_KATALOG.pdf

Part numbers are:

Crankcase top breather gasket (930-107-791-02)
Temp Switch Seal (located on the crankcase breather cover) (900.123.007.70)
Oil Thermostat O-ring (999-707-314-40)
Oil Pressure Switch (911.606.230.00)
Oil Pressure Switch seal ring (900.123.009.20)

[prebordao]

Thanks, I have the PET, but you saved me some work.

[tirwin]

Originally Posted by wachuko

Some tips:
- You see the red sensor in the bottom right? Oil can seep past the pressed metal edge (just above the hex) that overlaps the base of the red plastic. Put some epoxy like JB Weld around that to seal it permanently.

- There was a great debate about the oil cooler seals. The top two are the really critical ones. The current thinking seems to be that the green seals are prone to leaking. I can't remember which brand name matches the colors but the ones you want are the reddish-brown ones (you DO NOT want the green ones). The bottom seal is ok to use the green seals on however because it is not under pressure. I couldn't find the bottom seal in anything but green.

[prebordao]

Get it, Up-Brown, Down-Green !

[wachuko]

Originally Posted by tirwin

Some tips:
- You see the red sensor in the bottom right? Oil can seep past the pressed metal edge (just above the hex) that overlaps the base of the red plastic. Put some epoxy like JB Weld around that to seal it permanently.

- There was a great debate about the oil cooler seals. The top two are the really critical ones. The current thinking seems to be that the green seals are prone to leaking. I can't remember which brand name matches the colors but the ones you want are the reddish-brown ones (you DO NOT want the green ones). The bottom seal is ok to use the green seals on however because it is not under pressure. I couldn't find the bottom seal in anything but green.

I did not think about epoxy on the sensor...ha! Excellent recommendation... and on my way to doing so as the engine is still on the stand waiting for the body/paint work to be done...

On the oil cooler seals...red ones... was not aware of that.

[tirwin]

Something else to check is the transmission shift linkage nose seal. Mine was leaking like a sieve.

If you have the later model Carrera chain tensioner update, check for leaks at the banjo fittings on the oil lines that attach to the cam housing covers and the upper valve covers. There is a washer on the top and bottom of the banjo. I think the originals were aluminum and the replacements are copper.