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1988 Isuzu Impulse Turbo White Smoke Exhaust
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branman1971
Novice
Oct 19, 2008, 11:38 AM
Post #1 of 11
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1988 Isuzu Impulse Turbo White Smoke Exhaust
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1988 Izuzu Impulse
2.0 4ZCI Turbo Intercooler
104,000 miles
Runs and drives great, smooth running and smooth idleing. It blows white smoke from exhaust pipe once it warms up. The smoke has a coolant smell, not an oil burning smell. The warmer the motor gets the more smoke coming out, but does not overheat. Oil looks good, not milky. Neighbor told me that turbo might be bad but I don't know.
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branman1971
Novice
Oct 19, 2008, 2:57 PM
Post #2 of 11
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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Ok new development. Now there is no smoke coming from tailpipe. I let it run and get hot and the smoke quit. Maybe there was moisture in the system somewhere and it just had to burn out??? I will start it again tomorrow and see if it starts to smoke again.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 19, 2008, 4:15 PM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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The odor and increase noted in your first post still suggests this is a possible problem lurking. Pay a lot of attention to this. Gaskets can do just what you have seen and quit for a while,
T
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branman1971
Novice
Oct 19, 2008, 5:01 PM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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Also must add that the car does not overheat and the oil appears normal, no water in the oil. So the head gasket could allow coolant to seep and then stop seepage once it warms up?
(This post was edited by branman1971 on Oct 19, 2008, 5:07 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 19, 2008, 5:18 PM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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The so called classic "blown gasket" can leak any which way it seals not just coolant in oil or coolant burning in combustion chamber. It doesn't have to overheat and certainly can tighten up when hot or cold at first. It can be a problem with metal parts and not actually the gasketing at all too.
Let's just say you have a warning to pay attention to and hopefully it's nothing and time will tell. These things don't "heal" and sealers tricks usually don't work or work for long and best avoided if you were thinking of that.
Just watch carefully for anything. Being early if there is a problem will help a lot,
T
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branman1971
Novice
Oct 20, 2008, 7:49 AM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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I found a compression leak tester, and will try that this afternoon. That should confirm or eliminate the possibility of a bad head gasket or cracked head. Right?
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Tom Greenleaf
Ultimate Carjunky
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Oct 20, 2008, 8:15 AM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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Diagnosing a head gasket is inconclusive till you are actually there. What you need/want is to be sure that you have to go there to find the real flaw - gasket or perhaps the head/manifild or block has the flaw.
This one seems like it's just started or may have even been a false alarm so far but you have the warning to keep an sharp eye on it. You may test when it's not having an issue and test will be inconclusive. When parts are off you can usually see where the trouble was and by then you are going to replace gasket anyway but still should send out head for machine shop inspection or risk a quick re-do of the job.
If you do find compression equally low in adjacent cylinders that does suggest problems between the two. The check list goes on. Coolant in oil, oil in coolant, exhaust gasses in cooling system, -- plain leaks to the outside possible. Spark plugs tell a tale too as to whether they are or have been exposed to burning coolant, oil and other problems. Always nice when they all look about the same.
The up front testing can prevent wasting all the work to find some other problem later that fooled you. Speaking for myself - I hate to make the call on head gaskets as they are lots of work and $$ and being wrong would really stink.
THIS COULD ADVANCE TO REAL BAD IN NO TIME so be ready for that. Anything that won't stay broken for testing is a mechanic's nightmare,
T
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branman1971
Novice
Oct 20, 2008, 8:33 AM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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Understood, Thanks...Pulled spark plugs last night, all looked exactly the same, old and brown. Took some serious elbow grease to get them out too, never seen spark plugs so tight in the head. Put in new plugs, with never sieze, and will pull them back out tonight to see if they all look the same, as well as check for exhaust gasses in coolant system.
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Tom Greenleaf
Ultimate Carjunky
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Oct 20, 2008, 9:18 AM
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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That's just one on "fair" chart for plug reading. What's missing there is a super clean, could be very white compared to others indicates coolant burning. That cylinder if you can see in the hole would be cleaner too!
Note: The silver colored "anti-seize" for plugs works but just use the smallest dab on just the threads and ones with self sealing, non gasketed ones just a slight smear on that surface. I prefer silicone grease as is doesn't conduct electricity and if you make a mess in the boots, and up the insulator it alone can cause problems. Put those on the list to just replace anyway but they are good info as to what's going on in there.
Exhaust in coolant: There are testers OR just feel upper radiator hose when started from cold. It should take a while to build up pressure. If it builds up right away it suggests gasses are entering system AND if you remove (with all the cautions strickly adhered to) the pressure by loosening the cap or removing it for a look while warmish it may build up pressure again too soon - that's a strong clue of combustion gases getting in. In those cases the coolant is usually found too full at recovery tanks and the radiator low?? Overheats and poor or no heater operation would be common.
Right now this is info gathering for a diagnosis if you think you have time - always nice for something like this. Just don't let it overheat or contaminate the oil at the first blush of that finish up and FISH OR CUT BAIT!
There's a chance this was just a fluke. Weather extremes with cold then vehicle exposed to warm humid air quickly can make excessive white smoke (water/coolant) appearing exhaust for an extended time and would go away not to return. I've seen cars that water got in tailpipes make a scene for quite a while - kids playing, driving thru deep water and odd stuff like that.
The best part is you are watching closely as you always should but with the warning nice to catch it before an overheat is a surprise meltdown or oil floods full of coolant or something causing more damage than just gaskets.
I'm away for several hours now but check in constantly. Ask away. Others may be watching too and have input on this also. Good luck,
T
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branman1971
Novice
Oct 20, 2008, 3:40 PM
Post #10 of 11
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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I let the car warm up to operating temperature today and when I turned it off I heard a faint hissing/gurgling sound on the driver side of the motor under the exhaust manifold. I couldn't see under the manifold but the side of the engine looked wet and coolant was dripping under the car. Considering pulling the head to see if it's the head gasket, even though the oil looks fine.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 20, 2008, 6:23 PM
Post #11 of 11
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Re: 1988 Isuzu Impulse Turbo White Smoke Exhaust
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Could leak that way as said. Take the chance while it's intact to really see it - mirrors or whatever. Clean it off when cold, pressure check even may show it exactly so you are sure of just what and where,
T
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