Joined: Nov 2007
Location: college station
You prob just had an air pocket...... When the shop removed the HG to change them did they(as other have asked) check the heads to make sure they were straight and had a good mating surface??
If not they should have been milled.
- 2002 V6 Mustang Daily
- 86 Buick "Nope its a monte calro"
FS: 94-04 heads, cams, ported intakes.