996 Turbo / GT2Turbo discussion on previous model 2000-2004 Porsche 911 Twin Turbo and 911 GT2. Sponsored By Vivid Racing
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Just needed to feel some love today....I authorized my dealer to pull the motor to find a coolant leak. They said they removed the intake manifold and everything else from the block, but couldn't find the source of the leak.
Ouch. $$
Originally they thought it was a bad cap and replaced that. But 2 days later, the leak spilled onto my garage floor again.
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2001 Porsche 911 Turbo
2004 Audi S4 Avant
2006 Ducati 999
Probably the coolant tank like ole Walnuts "says"
I replaced mine when I had my motor out because it is so laborious otherwise.
The coolant tank should be bright white but when it gets old it gets yellow and brittle
and has a tendancy to leak. $125 part (max) and $LOTS$ labor.
Are you sure its the rms? I've been told this is pretty rare of turbos. I had a leak above the rear main seal that made it look like the rms was leaking. Turned out to be a leak from an o-ring related to the oil breather system. Good luck.
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Silver/Black 2001 996tt: EPL k16 flash, evo diverter valves, evo v-flow, B&M ss, Speetech 60mm exhaust; GT2 intercoolers
Other Cars: 2007 Escalade (White/Black), 1999 Zenith Blue 996 C2 (aerokit) (sold), 2001 Black Boxster S (sold), 1998 Ocean Blue Boxster (sold)
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Hmm. We've diagnosed lots of coolant leakages in NA and TT 996's but can't remember having had to R&R the motor to do so. Usually a pressure test and some close inspection will turn up the loss. Besides that, the oe coolant if it has been leaking for a little while will leave a powderey and/or crusty residue after it dries or is heated by the motor. Coolant reservoir leakages are very common as has been noted above-have one on the lift right now actually- they crack on the backside where it buts up against the inner fender and can be difficult to spot at times. The updated units have extra ribbing in the weak area. It's a pain to replace but the engine doesn't need to come out.
The oil cooler that failed in my instance is located behind the oil tank near the top of the motor against the firewall. It has tightly pressed in tubes for inlet and outlet of the coolant that should never come loose. One of my tubes became loose over time and began leaking. The entire piece had to be replaced. You can see the side with the missing aluminum tube below - it came right out and stayed in the hose - it loosened that much. There is no way to easily access this part. In order to remove it, not only did the motor have to come out, but the entire top of the motor had to be stripped. It was a big job for a simple leak. This was probably one of the worst possible points for a coolant leak to develop...
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John D (also post as John D, member since 2003)
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Last edited by John@SpeedTech; 02-04-2009 at 12:57 AM.
Are you sure its the rms? I've been told this is pretty rare of turbos. I had a leak above the rear main seal that made it look like the rms was leaking. Turned out to be a leak from an o-ring related to the oil breather system. Good luck.
2 days no word....hope its just taking them a while to get to the inexpensive coolant overflow tank.
Ironically. My garbage disposal failed today and while the plumber was replacing it, the pipe underneath the sink cracked. What's with my water karma????
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2001 Porsche 911 Turbo
2004 Audi S4 Avant
2006 Ducati 999
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