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

Steve W. swilliams268 at frontier.com
Sat Jan 31 13:40:42 PST 2015


Cecil R Bearden wrote:
> 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
> 

You could try it. It will depend on what is actually wrong as to whether 
it does any good. IF it's carbon or other dirt it might clear out, but I 
doubt that's the issue.

> 
> 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.
>>


-- 
Steve W.



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