My 1994 Isuzu Trooper has blue smoke when it is cranked after sitting for several hours and the engine is cold. It doesn't smoke on startup when the engine is warm. There is much more smoke the longer it has sat such as over night or for a day or two. I was wondering if it could possibly be the valve stem oil seals. The engine uses very little oil (maybe half a quart every 2000 miles) and has 190,000 miles on it. It runs good other than the startup smoking problem. I was thinking that as long as the engine is warm then maybe the seals expand and seal better and when the engine cools they contract and oil gets to the cylinder at startup. Does this sound like a possible cause? I have a shop manual for this car and it looks like a pretty straight forward fix although I would probably have mechanic do the work. The book I have only explains the fix and not the symptoms of bad seals. Does my engine have the symptoms? It's a 3.2 liter V6 with dual overhead cams.
2006-10-22 02:22:26 · 6 answers · asked by BLAZER1969 4 in Cars & Transportation ➔ Maintenance & Repairs
Hey Blazer I Normaly dont give out trade secrets that took a combination of 33yr master auto tech,repair shop owner,but im going to let you in on one.
all the previous awnsers are good sound advice,but i think you may have a combination of problems,probably worn seals,and some wear on the int. valve guides...... BUT there may be a cheap solution to your problem ,which could solve 80% of your problem,here it is
On dual overhead cam engines,well all engines ,over time ,high mileage the oil return holes in head become plugged,remove valve covers and verify,if you use penz,or quaker state a pariffin base oil you will Know this is the prob.
Take a shop vac and a wire and unplug oil return holes ,should be 2 on each head,being careful not to let debri fall to pan ,do NOT disturb any more than nessary reinstall valve covers ,you can do this your self, if this cheap fix dosent work, than follow prev. advice Post IF THIS SOLVES your prob.
2006-10-22 04:03:56 · answer #1 · answered by AJ 1 · 0⤊ 0⤋
The only way to be sure is to do a compression test on the engine, this will show if there is wear of the piston rings. You need to do a dry test, then add a tea spoon of engine oil into each of the pistons (via the spark plugs) then re-test. If there is a major difference between the two reading, then its time for a re-build. Just out of interest when the valve stem seals were changed did you check the valve stem guide clearances? If the valve stem guides are worn then no mater how good the stem seals there will always be oil consumption. Ja.
2016-03-28 03:57:41 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You have really just answered your own ?.Its called wear and tear items.In your owners manual it should give you a scheduled maintenance for your ride or go to your local Isuzu dealership and will steer you in right direction.They will let you know what needs to be changed and replaced with a SUV with high miles.Sometimes its probably better and cheaper at a local Joe garage.Also keep in mind who is certified and not.
2006-10-22 02:55:35 · answer #3 · answered by Leonidas P 2 · 0⤊ 0⤋
The ohc engines are more difficult to change out the seals normally but it sounds like the reason for the smoke on start-up.
2006-10-22 02:26:39 · answer #4 · answered by done wrenching 7 · 0⤊ 0⤋
With 200,000 miles, any money spent on this eng other than a total rebuild is wasted. Drive it until it wont pass smog check any longer and then rebuild the eng or trade it in.
2006-10-22 02:33:31 · answer #5 · answered by Trump 2020 7 · 0⤊ 0⤋
Sounds like the right cause.
2006-10-22 02:30:30 · answer #6 · answered by ronnny 7 · 0⤊ 0⤋