No compression #4 after head change
#1
No compression #4 after head change
So I had a bad exhaust valve on cyl 1 , no compression 125k motor. Pulled the head machine shot checked it, pressure test, surfaced and replaced 1 valve.
Replaced timing chain and reassymbled engine. Miss fire cyl 4, compression test shoes 0. 210 on other 3 cylinders.
I used to crank and cam locks , guessing leakdoen is next , but unless someone has a suggestion on something I missed, pulling head is going to happen.
Let me know.
.
Replaced timing chain and reassymbled engine. Miss fire cyl 4, compression test shoes 0. 210 on other 3 cylinders.
I used to crank and cam locks , guessing leakdoen is next , but unless someone has a suggestion on something I missed, pulling head is going to happen.
Let me know.
.
#3
Question. When I put the cam lock tool on, should exhaust valves on cyl 4 open? I had to move the exhaust cam to get the tool on flat and it engaged the exhaust valves.
#4
The following users liked this post:
cudamank (07-06-2019)
#5
Leak down test done today. 80% loss through exhaust.
So really bummed (that isn't quite strong enough). I pulled this head for no compression on 1, and found a burnt valve. Had machine shop inspect, pressure test and surface head. When I originally took it there I planned on all new valves. , But after they inspected I went with their recommendations and only changed the one.
Will be pulling head tonight or tomorrow night as it's about 100 hear today.
I figure I need to pull timing chain, and replace crank bolt, cam bolts, head gasket, tensioner? And I'll most likely change all exhaust valves.
Any suggestions? Or things I don't need or need to change? (Other than my luck?)
So really bummed (that isn't quite strong enough). I pulled this head for no compression on 1, and found a burnt valve. Had machine shop inspect, pressure test and surface head. When I originally took it there I planned on all new valves. , But after they inspected I went with their recommendations and only changed the one.
Will be pulling head tonight or tomorrow night as it's about 100 hear today.
I figure I need to pull timing chain, and replace crank bolt, cam bolts, head gasket, tensioner? And I'll most likely change all exhaust valves.
Any suggestions? Or things I don't need or need to change? (Other than my luck?)
#6
since you're raking it back to the shop, negotiate with them a new price and let them know they screwed up somehow, if they actually did, and have them do the stem seals. no need to replace the crank bolt. if the tensioner is the 78mm, I would upgrade that to 82mm. if the timing chain rails look rather burned, I would replace it.
The following users liked this post:
cudamank (07-06-2019)
#7
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