Date: Sun, 01 Dec 2002 17:58:29 GMT
From: Paul Halliday <>
Subject: Re: Erratic Idle and exhaust smoke...

in article klekuu4fqahurfn7djk2e88gv98d7utn8knopsamcom, John Davies at wrote on 01/12/2002 16:43: > On Sun, 01 Dec 2002 13:51:01 +0000, Matt Gibson > <> wrote: > >> Took my car in to have its throttle damper replaced the other day; since >> then I've noticed it idling rather roughly. Just went out to check it out, >> and if I leave it to reach operarting temp, it idles rough (erring on the >> side of slow rather than fast), sounds a touch unhealthy, and I'm getting >> quite a lot of white smoke coming out of the exhaust at that stage. > > White smoke is bad. Are you positive that it isn't merely > condensation? Moisture from normal startup will dissipate pretty > quickly as it drifts away. True white smoke will not - it is usually > associated with a blown head gasket. Coolant is entering the cylinders > and burning, causing the white smoke. > > I think you need to get this looked at ASAP - do not delay! Coolant in > the cylinders can cause a lot of damage if left for long. A blown head > gasket is usually easy to diagnose - there may be crud in the oil and > you may also get exhaust gasses in the coolant, which may be visible > as bubbles, and are certainly detectable with a simple emmissions test > probe. A compression leak-down test is probably the definitive method. > It requires a source of clean compressed air and a special gage set. Agreed, sounds like a blown head-gasket to me. White smoke when it's fully warmed is not a good sign. With the engine cold, take a look at the oil in the dipstick. If it looks like mayonnaise, water is getting into the oil. [See 'crud' above] This will, at least, confirm it to you and impress upon you the urgency. Best of luck, Paul 1985 900i 16V 1989 900 Turbo S

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2019 - The Saab Network -
For usage guidelines, see the Mission and Purpose Page.
[Contact | Site Map | on Facebook | on Twitter | Shop Amazon via TSN | Site Donations]