Grey/Whitish smoke (small amount) rising from rear of engine
2001 XJ8 with 84K miles, just purchased used, the engine does not run hot, nothing seems broken and I get no warning messages from the computer. However, when first parked, a small plume of whitish/grey smoke appears from the rear of the engine, just in front of the firewall.
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Re: Grey/Whitish smoke (small amount) rising from rear of...
Has to be a small oil leak above the exhaust header or pipe...Possibly the rear of the valve cover gasket...because the engine slopes to the rear, oil collects there, and drips off onto the exhaust. (I'm a 30 year retired British Leyland auto tech)
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Check the radiator. If it's brownish, whitish then the head gasket may be blown. If the smoke is bluish, the rings may be bad. Read through the following for more info: http://www.trustmymechanic.com/car-smoking-from-exhaust-pipe/
A very small amount of oil weeping onto something hot, manifold, turbo etc can give off considerable smell with little smoke. What's the miles? When was the last service? What condition is the engine? Worn engine can give pressure in engine forcing oil fumes/vapour out of breathers onto hot surfaces which then enter car ventilation system.
Hi Sherry, If the smoke is a whitish blue grey, Best observed while standing behind the car and while parked with the parking brake on and asking a friend to run the engine at about 2500 RPM. If the smoke is evident then it probably means that the piston rings are worn or damaged and the engine needs to be rebuilt or replaced. If you have had any overheating problems, it could also be a blown cylinder head gasket, which to repair is also a major job. Regards John
In the older cars, before all the emission laws added so much electronic garb, black smoke meant a fuel problem and grey smoke indicated a problem with internal engine parts like piston rings. Hope this helps.
i had the same problem as the 96 eclipse, but with me 91 Mazda... the main problem was the air hose so we duck taped it up until we buy a replacement. a little bt later the whole engine went bad and the head was warped and had a few cracks. Had that fixed and it ran great, then we started seeing whitish blue smoke from the exhaust... we're going to replace a vacuum modulator and a seal that a friend just added to the car after breaking the new one. We had also replaced several things first and tried the fuel cleaner. Nothing seemed to work or it would run okay for a mile then start up with its bad again. Good luck.
Hey M, the pressure could be nothing but "hot air" and not freon... (I had this same problem!!) I let off a bunch of pressure..(nothing but clear hot air!!) ..using a small flat punch..on the low pressure side... if freon on comes out right away..stop.. if nothing but hot air comes out.. keep letting it out until freon comes out,,, When mine started letting out freon,, I quit and tried the A/C again... and it has been working fine since.. Just my recent experience!!!!
Smoke is a sign of engine burning oil, which is caused by faulty piston rings, in most cases it's cheaper to have another engine installed in the car, instead of having work done on pistons.
Hope this helps and please rate the answer if it was helpful, it helps me, thanks!
P.S. Comment if you need more advice, it'll be my pleasure to assist you.
Every manufacturer has a guideline. But a quart every 1,000 miles seems higher then necessary. Try the easy steps first.
1. Check the PCV valve if clogged will caused pressure in crankcase and oil burning.
2. Remove spark plugs and perform visual inspection. IF electrode is covered in gook(technical terms, sorry), then oil is leaking into that cylinder. Most likely cause would be faulty valve stem seals.
3. Worse case scenario, engine oil rings are leaking. If all else is good. Perform compression test of each cylinder recording measurement, then add two small squirt of engine oil into each cylinder as you perform a second round, complete both dry then wet compression test on each cylinder before proceeding. IF any cylinder shows a more significant increase in compression then it would indicate that cylinder's oil rings are faulty. This is a major repair. Keep me posted