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Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Be very aware.....I've seen soooooo many problems with AFR heads right out of the box that I'd question everything about them. Check the valve stem seals at vacuum conditions like 84GT says. You may also need to pull the upper and make sure that you're not sucking oil past the intake gasket. Pull the heads off and have them gone through by a good shop. Check the valve guides and seats carefully. Also have the springs checked while the heads are apart.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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