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

[Cecil R Bearden]

One of my first thoughts was to disconnect the exhaust and check on 
convertor because I can hear a clanking, but it may be loose exh pipe.   
An experienced ford mechanic tells me that the valve is bent or galled.  
If it was running fine then started this, it must be galling.of the 
valve stem as the mechanic who worked on it tells me it was stuck, or 
the convertor is keeping too much back pressure on this valve.  I do not 
know if the galled valve is the intake or exh.  I was thinking of 
installing a heavier valve spring, and changing oil and running Marvel 
Mystery in the oil..

Cecil in OKla


On 1/31/2015 8:30 AM, Bo Hinch wrote:
> I have ran ATF thru the intake on older vehicles and it cleaned the carbon
> build-up on the valve stems and then ran OK . In this case , I would
> probably mix a upper lube with the gas and also put it in the oil and run
> it . It might be a good idea to remove exhaust while running the oil thru
> the intake . Another thought is , is the catalitc converter plugged ????
> my thoughts only
> Bo Hinch in Sulphur,la.
>
> On Fri, Jan 30, 2015 at 10:34 PM, Cecil R Bearden <crbearden at copper.net>
> 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
>>
>>
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