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

[Cecil R Bearden]

Would it be possible to chuck the valve in a drill and spin it while 
trying to get marvel oil, Kroil, Gibbs, etc to lubricate it.  I really 
don't have the time and place right now to pull the head...

Cecil in OKla



On 1/31/2015 10:25 AM, Steve W. wrote:
> Cecil R Bearden wrote:
>> 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
>>
>>
> Either the stem is bent or the guide has an issue.
>
> Put the piston close to TDC, pop the rocker off, pull the spring and let
> the valve drop down. Spin it while watching on a camera. If it's bent it
> will show it.
> If it isn't bent it's possible the guide has an issue and it's galling
> the stem.
>
> If it's in good shape, I would probably pull the head and toss on a used
> one. 125-175 bucks plus the gaskets.
>


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