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No compression on #4! And here's why:
As you can see I burned right thru the ring on the head gasket!
The gasses were heating up the stud and making it expand and then the head nut would spin as the engine ran.
I found this on my way to work Friday. I pulled off the interstate and tightened the nut and thought there was a little more exhaust noise, but didnt' have the time to investigate until Sat. morning. (thre more times on the ride home friday afternoon)
Got 0 psi compression in #4 so, I pulled the head and found the above.
Here's a pic of the head: (the top right you can see a little where the gasses were coming out.)
Lesson #1 learned this weekend, always clean off ALL the old gasket material no matter how little of it appears to be there. That was a $52 new head gasket gone in one week. Obviously, I wasn't getting a tight seal with the ~25ftlbs torque of the head bolts/nuts.
So I get the old head gasket and it looks mostly good. I shoot it with some metalic paint (lilke some have suggested here) and start putting the head back on. (after cleaning off ALL the old gasket 'paint' stuff that was on there before)
What do you call it when you do the same mistake twice ..?
I put the exhaust cam in the intake side and almost got it all the way tightened down when it started getting too tight and hard to get the cam cap down all the way. DOH!! wrong cam.... Okay, I've done this before, maybe I haven't damaged anything.
Swap the cams back the right way and get the timing marks all lined up and spin it with the starter and #4 sucks when the valve is supposed to be closed.
(and 0psi compression) BENT VALVE!!
Lesson #2: Double check and make sure you've got the right cam in the right spot before the first cam cap goes on.
This is when I call it quits on Saturday.
Sunday, I pull the head back off. (I'm getting pretty efficient at this)
Sure enough I can see sunlight thru the intake boot thru the bent valve.
I pull an intake valve out of the SG head, (Scarlet doesn't need it right now)
and put it in the G's head and give it a quick lapping. Put the head back on and had a hell of a time with the timing chain because it slipped off the drive gear down in the engine. Got it buttoned all up and averaged 120psi on all 4!
best numbers I've seen on the G in years.
I decided to swap out the carb diaphram and slides with the SG, because the old ones wouldn't hold the slide up with the thumb over the hotdog hole.
Holy cow, he runs like a champ now. He had so much power off the line that I was a little shocked.
I still haven't had a chance to pull the steering bearings out for a lube or get the fork seal changed yet, but I did get a few mins to at least bleed some new brake fluid thru the front calipers, maybe that'll help with the sticking front for a while.
Now I have something to ride to work and now I can focus more on getting the SG ressurected for XSEast !
As you can see I burned right thru the ring on the head gasket!
The gasses were heating up the stud and making it expand and then the head nut would spin as the engine ran.
I found this on my way to work Friday. I pulled off the interstate and tightened the nut and thought there was a little more exhaust noise, but didnt' have the time to investigate until Sat. morning. (thre more times on the ride home friday afternoon)
Got 0 psi compression in #4 so, I pulled the head and found the above.
Here's a pic of the head: (the top right you can see a little where the gasses were coming out.)
Lesson #1 learned this weekend, always clean off ALL the old gasket material no matter how little of it appears to be there. That was a $52 new head gasket gone in one week. Obviously, I wasn't getting a tight seal with the ~25ftlbs torque of the head bolts/nuts.
So I get the old head gasket and it looks mostly good. I shoot it with some metalic paint (lilke some have suggested here) and start putting the head back on. (after cleaning off ALL the old gasket 'paint' stuff that was on there before)
What do you call it when you do the same mistake twice ..?
I put the exhaust cam in the intake side and almost got it all the way tightened down when it started getting too tight and hard to get the cam cap down all the way. DOH!! wrong cam.... Okay, I've done this before, maybe I haven't damaged anything.
Swap the cams back the right way and get the timing marks all lined up and spin it with the starter and #4 sucks when the valve is supposed to be closed.
(and 0psi compression) BENT VALVE!! Lesson #2: Double check and make sure you've got the right cam in the right spot before the first cam cap goes on.
This is when I call it quits on Saturday.
Sunday, I pull the head back off. (I'm getting pretty efficient at this)
Sure enough I can see sunlight thru the intake boot thru the bent valve.
I pull an intake valve out of the SG head, (Scarlet doesn't need it right now)
and put it in the G's head and give it a quick lapping. Put the head back on and had a hell of a time with the timing chain because it slipped off the drive gear down in the engine. Got it buttoned all up and averaged 120psi on all 4!
best numbers I've seen on the G in years.I decided to swap out the carb diaphram and slides with the SG, because the old ones wouldn't hold the slide up with the thumb over the hotdog hole.
Holy cow, he runs like a champ now. He had so much power off the line that I was a little shocked.
I still haven't had a chance to pull the steering bearings out for a lube or get the fork seal changed yet, but I did get a few mins to at least bleed some new brake fluid thru the front calipers, maybe that'll help with the sticking front for a while.
Now I have something to ride to work and now I can focus more on getting the SG ressurected for XSEast !
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