1980 Ford

Asked by Mar 14, 2016 at 03:29 PM

Question type: Shopping & Pricing

Have a 300 straight  6 ,  smokes (White ) ,
not black or blue  needs fixed not sure what
to do

3 Answers

71,365

Smoking white smoke out the exhaust is a blown head gasket.

71,365

It is possible the head may be cracked also. It would have to be magna fluxed to check for a crack.

95,035

If the rig has an automatic tranny, look at the vacuum modulator on the trans, it could be leaking trans fluid into the vacuum port and getting sucked into the engine. If that checks good then have a block test performed, if it is positive then you will have to pull the head and find out if it is a blown head gasket or a cracked head, both are common so you won't know until you get it torn down. If the block check is negative then look for fuel contamination, Diesel in the gas can cause white smoke but usually it doesn't run well.

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