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Join Date: Jul 2010
Location: Worcester, MA
Posts: 214
Sudden smoke from exhaust (alot)

My 90 c4 has been running fine until last night when massive amounts of white smoke began pouring out of the exhaust. Smoke aside, the car seems tostill idle normally, however it does backfire once upon start up. I have not done a leak down test yet. In searching there seems to be 3 leading culprits:
- oil over fill
- broken piston rings
- or a burnt valve

I added alittle oil a week or so ago, but have driven the car a couple of times prior to this incident with no problems or erratic readings on the oil gauge. Prior to this incident the car did not appear to smoke at all. I am hoping that this is just something small and stupid, but would like to hear some thoughs from some fellow Pelicans as I am fearing a top end rebuild. If it matters, the car just turned 108k
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Adam
3.2 Carrera (sold), 964 C4 (sold),
SWB 912, 3.0 SC, SWB R Project,
997 Cab, 2.7 Targa

Last edited by attamz; 04-08-2012 at 01:27 PM..
Old 04-08-2012, 12:12 PM
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Join Date: Aug 2008
Location: Lady Lake Fl
Posts: 86
Garage
Dear Adam

Had same problem,
See
964 Oil leaks & fixes thread.

Andrew
Old 04-08-2012, 03:23 PM
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Join Date: Jul 2010
Location: Worcester, MA
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Thank you Andrew, your post is a very useful resource..However I think I may be having a different problem. Thick white smoke it billowing out of the exhaust as something is being combusted. There is no oil in the tail pipe and the smoke has a strange foul type of smell. Is it possible that some how brake fluid is entering the intake manifold? From my understanding the c2 brake booster is vacuum operated where as the c4 is hydraulic. If this was the case, how would the fluid beable to make its way into the motor?
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Adam
3.2 Carrera (sold), 964 C4 (sold),
SWB 912, 3.0 SC, SWB R Project,
997 Cab, 2.7 Targa
Old 04-09-2012, 07:51 AM
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Join Date: Jul 2010
Location: Worcester, MA
Posts: 214
update: In inspecting the oil there seemed to be a decent amount of water in the bottom of the oil tank. Upon searching it seems that people who drive their cars short distances with out giving them time to properly warm up can develop condensation. I changed the oil and it seems that the problem has cleared itself up for now or atleast it think so.....
__________________
Adam
3.2 Carrera (sold), 964 C4 (sold),
SWB 912, 3.0 SC, SWB R Project,
997 Cab, 2.7 Targa
Old 04-10-2012, 07:54 AM
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Old 04-10-2012, 07:54 AM
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