Burnt Valve?
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Joined: Jul 2003
Posts: 2,454
Likes: 1
From: Adams TN
Burnt Valve?
When i am driving down hill with the clutch engauged and foot out of the throttle it will smoke white. and only down hill.
WHY? Is it a burnt valve thats what my dad said he also said it could be a valve not seating properly.
I have also been told that when it runs lean it can smoke white by a drag racing friend.
Whats wrong with my truck?
It doesn't miss or have loss of power when this happens.
It doesn't run hot or use oil.
WHY? Is it a burnt valve thats what my dad said he also said it could be a valve not seating properly.
I have also been told that when it runs lean it can smoke white by a drag racing friend.
Whats wrong with my truck?
It doesn't miss or have loss of power when this happens.
It doesn't run hot or use oil.
Elder User
Joined: Mar 2003
Posts: 628
Likes: 0
From: Colorado
Compression would be lower in THAT cylinder. You might also experience back firing.
WHITE smoke sounds more like water in the exhaust - perhaps from a leaking head gasket? Check your dip stick for "hot choclate" looking oil, & radiator for "foamy" antifreeze, both of which (IIRC) are symptoms of a leaking head gasket.
As you let off the gas (down hill) water could be drawn in & create the "white" smoke. Under acceleration, it COULD be forced into your oil, but WOULDN'T be "drawn" into the cylinders (and thus NO smoke - under acceleration).
WHITE smoke sounds more like water in the exhaust - perhaps from a leaking head gasket? Check your dip stick for "hot choclate" looking oil, & radiator for "foamy" antifreeze, both of which (IIRC) are symptoms of a leaking head gasket.
As you let off the gas (down hill) water could be drawn in & create the "white" smoke. Under acceleration, it COULD be forced into your oil, but WOULDN'T be "drawn" into the cylinders (and thus NO smoke - under acceleration).
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