Got them oil leak blues again

carreraplanes · 06-17-2006, 03:34 PM

Just bought a 911T with E and S upgrades. Did not pay over the top as the clutch is U/S. Fired it up before I bought it, noticed oil dripping onto the N/S heat exchanger. Fine I thought, that'll be the crummy old non turbo rocker covers. Disconnected everything ready for the drop today. Whilst underneath I noticed that it was not coming from the rocker covers but the area of the mating surfaces between the cam carrier and the tops of the heads. My initial reaction was that it was a failure of the sealing at that joint. However I'm wondering now if it is leaking from the ends of the rocker shafts. Despite owning several 911s I've not had this problem before so not quite sure of the symptoms. Question is when those rocker shaft ends leak, does the oil emerge from the area of the cam carrier to head joint and if not what path does it take normally?

Thanks in anticipation.....

MBEngineering · 06-18-2006, 06:35 AM

HI the only way to find out is to pull the R/Covers off and take a look, if nothing is wet in the rocker shaft ends then check the oil return tubes from the camboxes, poss the cam seal/gasket leak, which end of the cambox is leaking,?? if they are ok the its the engine strip time to clean up/reseal and refit to car.

regards mike

hcoles · 06-18-2006, 06:48 AM

yes...if shafts are leaking you will see the origination at the ends of the shafts...it can drool down toward the middle of the engine and may look like cam tower to head seal issue

I had the rsr seals and two intake shafts were leaking..I removed them, cleaned and reinstalled with what I think is as much torque as I care to apply before something could break. When I inspected the shaft bores in the cam tower I notice nicks from trying to remove a shaft before I knew more that I do now....which as time goes by seems less and less.

Many thanks to Henry and all the guys that know so much helping us out.

-h