White smoke and high temp! (Not covid😳) - Impala Tech
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  • 1 Post By Big Dave
  • 2 Post By jayoldschool
 
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post #1 of 6 (permalink) Old 09-01-2020, 06:02 PM Thread Starter
 
 
Join Date: Jul 2020
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White smoke and high temp! (Not covid😳)

My ‘65 Impala issue:
-white smoke from one dual exhaust pipe
-that pipes exhaust seems much hotter than the other
-no oil in water and no water in the oil
-small loss of coolant
-runs but misfires at most speeds

Added K-line to seal head gasket- helped temporarily, smoke back again now but less.
Engine just got new HEI, wires and plugs(R45)

Any thoughts on the smoke and misfiring?

Thanks, Dave :-))
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post #2 of 6 (permalink) Old 09-01-2020, 06:08 PM
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White smoke is either ATF burning or Anti-freeze. My guess is you have either a craked head/block or a blown head gasket. blown head gasket is cheaper to fix but it is still expensive.

Big Dave
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post #3 of 6 (permalink) Old 09-01-2020, 08:01 PM
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Pull the plugs for that side. The cylinders with the crack/head gasket will have clean insulators on the plugs compared to the other ones.
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Two doors, four doors, wagons, and ragtops.
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post #4 of 6 (permalink) Old 09-02-2020, 11:53 AM Thread Starter
 
 
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Thanks to you both. I was thinking sadly the same thing. Yes, the insulator on one plug was clean compared to the others. That’s the bad news. The slightly better news is that the K-line stuff may be working! Virtually no white smoke now. But even with that, the “white smoke side” exhaust is still so much hotter than the other side. BTW, did a compression test and all cylinders were 120-130.
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post #5 of 6 (permalink) Old 09-02-2020, 04:26 PM
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That is bad news as a blown head gasket would show two adjacent cylinders down on cranking pressure. That leaves a cracked head or cylinder block that expands as the engine heats up.

Big Dave
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post #6 of 6 (permalink) Old 09-02-2020, 07:16 PM
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You know the problem now. All that's left to do is take it apart and find the crack.

Two doors, four doors, wagons, and ragtops.
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