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Username Post: 77 impala white exhaust        (Topic#312347)
Chevy30517 
Forum Newbie
Posts: 1

Reg: 06-05-14
06-05-14 06:48 PM - Post#2458916    

So i got a 77 impala and it has been sitting for 3-4 years so it needs some work. I rebuilt the carb and put new plugs and wires and it is starting great and is idling good now, it was stalling. I noticed the exhaust looks white and i that there is white smoke coming out from around the manifolds on both sides, i thought it might be dirty gas or moisture from sitting, but it has been run a lot so i don't think thats it. The intake, valve covers, the entire engine is covered with dirt and grease and i think it could have an oil leak as well because its was low and i checked it again and it looks lower. Im not as worried about the oil problem i think it might be the valve cover gaskets, but i'm wondering if the white smoke might be coolant, ant the fact that its coming from the manifolds to. I thought maybe a blown head gasket but the engine runs great it doesn't have a miss or low compression as far as i can tell from how it sounds. Im just wondering if i'm overlooking something. The person i got it from had overfilled the coolant, would that hurt anything.



 


ejbasnett 
Forum Newbie
Posts: 2

Reg: 06-26-14
06-26-14 10:27 PM - Post#2464757    
    In response to Chevy30517

"Too much coolant" shouldn't cause a problem. If things are working properly, any overflow should be pushed back into the overflow can under the hood. White smoke sounds like a major oil leak- could be a bad valve guide, badly worn rings. Generally speaking white smoke is oil.

-Enoch



 
VintageCarryall 
Valued Contributor
Posts: 2634

Loc: Arizona
Reg: 10-08-06
07-04-14 10:13 AM - Post#2466591    
    In response to Chevy30517

  • Chevy30517 Said:
So i got a 77 impala and it has been sitting for 3-4 years so it needs some work. I rebuilt the carb and put new plugs and wires and it is starting great and is idling good now, it was stalling. I noticed the exhaust looks white and i that there is white smoke coming out from around the manifolds on both sides, i thought it might be dirty gas or moisture from sitting, but it has been run a lot so i don't think thats it. The intake, valve covers, the entire engine is covered with dirt and grease and i think it could have an oil leak as well because its was low and i checked it again and it looks lower. Im not as worried about the oil problem i think it might be the valve cover gaskets, but i'm wondering if the white smoke might be coolant, ant the fact that its coming from the manifolds to. I thought maybe a blown head gasket but the engine runs great it doesn't have a miss or low compression as far as i can tell from how it sounds. Im just wondering if i'm overlooking something. The person i got it from had overfilled the coolant, would that hurt anything.



OK: you might have blown head gaskets; but, your smoke coming from outside of the exhaust manifolds is most likely oil that's caked on them. IMHO your best be would be to replace the valve cover gaskets since older Chevy V8's were infamous for leaking there and making a mess in general.

White exhaust; that could also be a coolant leak. If you can, trying idling you car for about 15 minutes then step on the gas while it's in Park. If you still see clouds of smoke, you might have an internal engine problem as the second poster in this thread stated. If the smoke clears up, I'd chalk it up to junk trapped in the catalytic converter from your car sitting for so long.

1994 Dodge Caravan SWB 3.3L V6
1962 Studebaker Lark 4 door 350 Chevy/TH350



 
oldgmc 
Contributor
Posts: 193
oldgmc
Loc: NJ
Reg: 07-09-06
03-31-16 03:05 PM - Post#2618861    
    In response to VintageCarryall

Do a compression check low read is 2 adjoining cylinders can some times show a leaking head gasket.

1977 Impala Station Wagon
1988 GMC Sierra 3500
1993 2500 Vandura


 
49_Purple 
Contributor
Posts: 142
49_Purple
Loc: Krydor, Sask. Canada
Reg: 08-21-15
03-31-16 07:28 PM - Post#2618913    
    In response to oldgmc

...only white smoke I ever seen was anitfreeze burning. Do you hear it bubbleing in the rad or see it coming out the overflow into the reserve tank ? , top rad hose hard as a rock after the engine has run for awhile ? all symptoms of a blown head gasket.

58 Impala Sport Coupe 348 tripower
58 Impala Convertible 348 tripower
58 Sedan Delivery
68 Impala 9 pass wagon original
49 Chev 5window ,diesel
82 Corvette


 


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