SHOracer86
Member
I noticed that whenever i downshift to slow down that when i come to a stop a cloud of white smoke goes past my car. And it isn't the best smelling smoke either. What to you guys think it could be maybe valve seals or guides?
Car smokes on downshift.
- Thread starter SHOracer86
- Start date
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CerberuS
300 HP N/A SHO
downshifting @ 7k RPM?
Look in your rad if theres coolant missing. I really hope its not that. (Head gaskets Blown)
Valve seals , blue smokes only on startup.
Look in your rad if theres coolant missing. I really hope its not that. (Head gaskets Blown)
Valve seals , blue smokes only on startup.
SHOracer86
Member
its downshifting at about 3500 to 4000
SHOracer86 said:
Too high, wtf. You should only downshift at 2500 to bout 3000. This brings revs to just under 4k. Why the **** would you downshift at 4k, which would bring you around 5000 and your slowing down and the seconderies are open. LOL
-Mike
CerberuS
300 HP N/A SHO
is the coolant ok?
CerberuS
300 HP N/A SHO
Paul said:
Could be piston rings then. Time for a motor job.
NotSoSlowSHO
Gas is $$ WALK!
CerberuS said:
Rings? Not on the SHO.
Look into valve stem seals. Can be done with the motor in the car.
Mine has started to do it in the last 15k or so. But Im running catless, so a bit is expected. Just have to watch oil use.
How is your oil consumption? Does it blow a little smoke first thing in the morning too?
CerberuS
300 HP N/A SHO
NotSoSlowSHO said:
Dont valve stem do oil burnings only on startup?
Unless there so bad , they leak while running too?
It would be a first timer for me if its the stems...
NotSoSlowSHO
Gas is $$ WALK!
Needing rings on a V6 SHO is very rare.
Normally bad valve stem seals start to show themselves just at start-up. Sitting overnight, they allow a bit of crank case oil to enter the combustion chamber. If they get bad enough, you can get smoke during hard WOT, as well as hard engine braking.
Another something to look into is the PCV system. If blowby overcomes the oil separator's ability to knock down oil and vapors before it reaches the intake, the motor will start processing oil along with it's air-fuel mixture.
Simple way to check this.... just pull off the intake crossover tube, and look into the surge tanks. If there is oil puddles, youve got blowby/PCV issues.
Normally bad valve stem seals start to show themselves just at start-up. Sitting overnight, they allow a bit of crank case oil to enter the combustion chamber. If they get bad enough, you can get smoke during hard WOT, as well as hard engine braking.
Another something to look into is the PCV system. If blowby overcomes the oil separator's ability to knock down oil and vapors before it reaches the intake, the motor will start processing oil along with it's air-fuel mixture.
Simple way to check this.... just pull off the intake crossover tube, and look into the surge tanks. If there is oil puddles, youve got blowby/PCV issues.
Mr95Gl
Mr Tire Iron
NotSoSlowSHO said:
And if this is the case, what would one go about doing to solve blowby/PCV issues?
NotSoSlowSHO
Gas is $$ WALK!
First, make certain none of the lines are pinched, pugged, loose, or damaged.
Then perform the PVC "mod" that has been discussed in depth on this forum. Simple mod, that involves plugging the valve cover to throttle body PVC line.
Finally, install a catch can in the oil separator-to-throttle body line.
Then perform the PVC "mod" that has been discussed in depth on this forum. Simple mod, that involves plugging the valve cover to throttle body PVC line.
Finally, install a catch can in the oil separator-to-throttle body line.
Rings getting stuck(contrary to popular belief) is common on Hi-mile SHO's or heavely used SHO's, especially if you have had a K&N filter. How many miles do you get to a quart of oil? No bull now. ******* the gas it will use more. Rings wearing on SHO's is rare..but, the rings will carbon up and get stuck. this sounds like the case to me and you're only recourse is a ring job. Additives won't work.
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whiteman_01
Well-Known Member
I am currantly using 1 quart every 300 miles in my 92. I cant wait to get this 3.2 ready. Otherwise she runs very well, only complaint i have is she is a little cold blooded.
clindahl
Member
1 QT every 300 miles? Dude that is going to cost you a fortune. What do you think is wrong with the motor, and are you going to tear it down to find out what is wrong when you put the 3.2 in??
I burn about 1 qt in 500 miles. I did the valve stem seals and that stopped the smoke on startup, but she still burns oil like crazy. I have check, checked and rechecked the PVC system, and everything is clean and clear as I have had it apart totally 3 times in the last 5000 miles or so.
I have NO leaks of oil on the car, so I'm personally thinking that the rings are toast. I got the car w/ 113k on it needing some major maintnance (oil everywhere, no A/C, slipping clutch, etc), but they have documented 3000 mile oil changes for the life of the car. Figure that one out?
I burn about 1 qt in 500 miles. I did the valve stem seals and that stopped the smoke on startup, but she still burns oil like crazy. I have check, checked and rechecked the PVC system, and everything is clean and clear as I have had it apart totally 3 times in the last 5000 miles or so.
I have NO leaks of oil on the car, so I'm personally thinking that the rings are toast. I got the car w/ 113k on it needing some major maintnance (oil everywhere, no A/C, slipping clutch, etc), but they have documented 3000 mile oil changes for the life of the car. Figure that one out?
whiteman_01
Well-Known Member
Well, i was told it was rings. TooFastSHO said that if it smokes when you downshift at about 3500 rpm and just let it drop it would be rings, and when you start it up in the morning if it smokes them it would be valve seals. I am goig to take the 3.2 out of my atx and hopfully swap it straight in to my 92. I will be doing rob brearings and a valve adjust on it first, with a full 60k. That should take care of my problem.
It is slightly over 300, but i add a quart every time i fill the car. Which is about 330 on empty.
It is slightly over 300, but i add a quart every time i fill the car. Which is about 330 on empty.
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I glad you have hope. Don't wwwaaaste you're money. Maybe you are too deep into thing thing? To fix a oil burner is about $4000 for a non-mech. I have a SHO that smokes if you start it up morning, noon or night and it smokes. It runs like a dream. Very fast. Unfortunatly, The oil level goes down a QT & 1/2 every 150mi. The cat converter can't hide the smoke after a certain point. JUNK YARD MOTOR!!!! Get one they are out there.
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