[AT] off topic, need help on new parts chasing truck.

[Robert Brooks]

Cecil

I'm guessing either the valve is bent or the valve guide is galled.  Either
way the best way to fix it is to pull the head and fix it right.  It's a
pain to do a valve job, but you won't have any more issues with sticking
valves.  While you have to top end off, check the cam and lifters.

Pull the valve spring before pulling the head and see if the valve will
turn, I'd bet it won't or it turns hard....

Just make sure the piston is up high enough that the valve can't drop into
the cylinder.....

Bob


-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Cecil R Bearden
Sent: Friday, January 30, 2015 11:35 PM
To: Antique tractor email discussion group
Subject: Re: [AT] off topic, need help on new parts chasing truck.

Just purchased a 2000 f150 4x4 Lariat supercab 5.4L with all the bells &
whistles.. Previous owner bought it at auction and it started running rough,
they took it to a reputable mechanic who replaced all spark plugs, coil
packs, lifter, rocker, and spring on the #7 cyl . They used a camera to look
at piston to determine if valve had struck piston. 
Valve is still sticking. It will start and run fine for 5-10 seconds then
too rough to keep idling. sorta smooths out at 2000 rpm. I talked to the
mechanic who said that they spent over $1000 or work & time trying to
unstick the valve. The valve would unstick when they pulled it up, but the
cam would stick it down.  It runs fine for about 5-10 seconds after starting
then runs so rough that it will barely move out of its tracks. P.O. said
that he put a new battery in it and then took it for a drive to go to the
detail shop and it started running rough.  
They then took it to the mechanic.  P.O. decided not to put any more money
in it when told that the valve was stuck.Mechanic told me he did not think
valve was bent.

I have posted on Ford truck Enthusiasts forum and only received dumb looks.

Any suggestions??

Cecil in OKla


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