cylinder 7 no compression
#1
cylinder 7 no compression
I have a cylinder 7 misfire and it happened a month ago then went away, now its back and the truck is running rough. I made sure the coil pack and plug were fine and brought it to the local mechanic who told me there was no compression in cylinder 7. I brought the truck home today and pulled the valve cover and noticed everything was coated in burnt oil. when i pulled the lifters and rods out of #7 there was caked up burnt oil on the rods. Any ideas?Vehicle has 120,000mls
#2
depending on the year and engine type...cylinder 7 is a afm cylinder. crank it over and see if the rocker arms moving for that cylinder. if not, the afm lifter has collapsed.
#6
Afm
I change my oil religiously and always check it. What I did notice when I tore the top end apart was the driver Side of the valves were caked with burnt oil and the passenger side was golden. I believe I just had a stuck lifter which sucks because I could of just done an engine flush instead of a rebuild. Live and learn I guess.