Possible Valve/Head Damage Please Help!!!
Well, went to replace what I diagnosed a few weeks ago as a bad injector today in cyl #5, and when the experts heard the truck crank up even before the replacement, they told me there was something mechanicaly wrong/broken to make it sound so bad but hoped injector was it. Replaced injector. Hard start, bad injector tick is gone now, but uncovered a worse problem.
#4 cyl is missing bad. Can hear the popping through exhaust, but more so through the intake pretty loudly. Disconnect the wires to injector seliniod #4 it changes idle tune/rpms but popping sound/missfire goes away. So what we looking at here??? I'm thinking/hoping beyond hope its just a loose valve seat causing the valve to not close properly or a chip in a valve. |
With the history of the '03-04's dropping valve seats I would pull the head.
At least get that one issue taken care of. MikeyB |
Gotta pull head no matter what.Pull it and see.Same outcome eaither way.
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is there a way to cure the 03-04 dropping seats? head rebuild with better seats?
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Originally Posted by elirandolph
(Post 1927745)
is there a way to cure the 03-04 dropping seats? head rebuild with better seats?
With the boost elbow and the latest SMARTY program I'm seeing about 950-1000 degrees max. I believe they stake in the seats by pinging with a center punch to fix this issue. MikeyB |
Ok, that was the majority opinion as to what is causing the problem. #4 exhaust valve lash was overly tight. Looked around on search and Seems #4 is usually a big culprit of dropped seats. But usually the ones who had problems had theirs drop and wound up with extremely loose valve lash.
So how much we talking bout for a complete rebuild with pinned seats on a rebuildable core??? I most likely will use Jeff Garmon, as he's the closest shop with a great reputation and service. |
Talked to a few shops. Several said I would be better all around starting off with a brand new '04.5+ loaded head which has the better intake ports and improved valve guides/seats. So, looks like I'll be going this route. Anybody have one laying around they dont need?
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Do a webb search on Dover Cylinder heads.Call and ask them about seats and such.The one in Atlanta was run by a tech that worked for me years ago.I've bought several sets of heads from them over the years.First rate high tech head shop.
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