black89t;1461695 said:
Its not that big of a deal. Pull head tonight. Install new valves and valve job. Sucks they were oversize valves too.
zero compression on all 6 cylinders
- Thread starter survyor2
- Start date
Its not that big of a deal. Pull head tonight. Install new valves and valve job. Sucks they were oversize valves too.
i think your plan sounds good.
just make sure the crank is 0 and the cams are straight up. i don't see how you would run into any problems doing it that way.
just make sure the crank is 0 and the cams are straight up. i don't see how you would run into any problems doing it that way.
Pulled the head. I can see that for sure a #6 exhaust valve hit something. The carbon is worn off of that valve on the lower outside edge. I'm going to pour some alcohol on the top of each valve and see if it leaks through but thats just out of curiousity, all valves will be replaced.
Dennis
Dennis
man i wish i had your kind of money =0) sucks all this happened man. i working out all the kinks in my supra and try and get it to 450rwhp. GOOD LUCK TO YOU SIR!
-t3d
-t3d
the t3d;1462525 said:
hey Ted. Yeah, its just a minor bump in the road. Should be back up soon. There isn't a problem out there that I can't fix by throughing money at it. I should be at the FL2k10 in fort lauderdale. You should come over.
Dennis
UPDATE and I still need help.
I removed the head, ordered new valves and brought them to the machine shop. I had the shop vacuum test the valves. They said there is NO BENT VALVES and the vacuum test was exceptionally well.
Here was my previous compression test:
1-115 2-105 3-137 4-102 5-130 6-121
w/ oil
1-125 2-115
So oil didn't help much. I assumed it helped a little because the motor was cold. I don't think its my JE rings with only 2000 miles. That and I had no problems because I installed by head. The valves are not leaking. So what about the cam lash? I am beginning to suspect this. Yes I have 0.15mm for the intake and 0.20mm for the exhaust. I measured this lash myself with the lobe 180 degrees from the top of the lifter. However, I noticed this clearance was much smaller when the lobe was pointing away from the lifter but not at 180 degees, more like 120 degrees. Maybe the cams are out of round? Maybe I should increase the lash clearance?
Dennis
I removed the head, ordered new valves and brought them to the machine shop. I had the shop vacuum test the valves. They said there is NO BENT VALVES and the vacuum test was exceptionally well.
Here was my previous compression test:
1-115 2-105 3-137 4-102 5-130 6-121
w/ oil
1-125 2-115
So oil didn't help much. I assumed it helped a little because the motor was cold. I don't think its my JE rings with only 2000 miles. That and I had no problems because I installed by head. The valves are not leaking. So what about the cam lash? I am beginning to suspect this. Yes I have 0.15mm for the intake and 0.20mm for the exhaust. I measured this lash myself with the lobe 180 degrees from the top of the lifter. However, I noticed this clearance was much smaller when the lobe was pointing away from the lifter but not at 180 degees, more like 120 degrees. Maybe the cams are out of round? Maybe I should increase the lash clearance?
Dennis
Just spoke with the machine shop. they are going to double check the lash clearance for me. They also noticed that the head surface was not flat and that could be it also.
Good luck man. Even though I cant help you with your question, I find it very informative. Hopefully its not gonna break your wallet.
So the valves checked out great.
They checked out the valve lash, checks out great.
They checked out the head surface, problem. The head surface was out 12 thous. This could have been my problem. I'm surprised since the head surface was done 2000 miles ago.
I'm going to do some testing on the rings tonight, then its all going back together this weekend.
Dennis
They checked out the valve lash, checks out great.
They checked out the head surface, problem. The head surface was out 12 thous. This could have been my problem. I'm surprised since the head surface was done 2000 miles ago.
I'm going to do some testing on the rings tonight, then its all going back together this weekend.
Dennis
^well you were saying you have pulled the head a couple times already. so that alone can warp it pretty good unless you are extra careful and take the time to crack them loose in like 5 passes.
i'm not positive but i think the .012" warp is the problem. that is really extreme. and to cut that flat they're going to take like .015". you're head might reach its limit. like to see what others say.
i'm not positive but i think the .012" warp is the problem. that is really extreme. and to cut that flat they're going to take like .015". you're head might reach its limit. like to see what others say.
black89t;1468656 said:
I loosen the head in 3 passes. I usually torque to 90 ft-lb in 3-4 passes. I'm going to back off of that a bit. This shop usually checks to see if the head is in spec. They didn't say anything about that to me this time. My last head became out of spec and they let me know.