Really strange compression problem

jkstang78

jkstang78

Well-Known Member
#1
#1
Hi everyone After figuring out my computer went bad and cross threading a spark plug. I pulled the head off had the hole fixed and put the motor back together. I had set the valves having Compression when turning the motor over by hand. Set everything and ran the car. I changed the oil and ran the car again. I had a friend come over and we adjusted the other side of motor valves Because they were making noise.

So we went back to the otherside to readjust them (they made a little Bit of noise). But as we were truning the motor over we notice that we couldn't get any compression. We had it in the first hole But nothing in the 2nd or 3rd holes. We went back to the first hole and No compression.

So I broke out a compression tester. Drivers side had 150 as test. Went to passenger side of the motor and Had 0 0 0 on 1,2,3. I didn't do a leak down test. Just crank the motor over with the starter.

What do you guys think Bad gasket? I can't see screwing up all the rings on just 1 side of a motor. When I pulled the head back off the Whole gasket was wet. Even places that it should not have been. When I did the torque specs I use the factory specs. Any problem with that Or do the MLS gasket and arp studs require more torque?

 
S

ShelbyGT

Formally silvergt / Member Plus
#4
#4
sounds like the wrong gasket or maybe the install was wrong, meaning the wrong side was facing up or down, whichever way you want to look at it
 
jkstang78

jkstang78

Well-Known Member
#5
#5
silvergt said:
sounds like the wrong gasket or maybe the install was wrong, meaning the wrong side was facing up or down, whichever way you want to look at it
Click to expand...

Wrong gasket maybe, But it did say front on the gasket and I couldn't flip it or it would have been upside down or front would have been on the rear.
 
T

TERROR

Well-Known Member
#6
#6
arp studs have different torque specs but theyre not too far from stock....did you make sure both surfaces were clean when you put on the gasket?
 
MaximumRisk

MaximumRisk

NYC Regional Coordinator
#7
#7
check the head and block to make sure the surfaces are straight.
Are those Cometic head gaskets? if so it is always a good idea to give them a lite coat of cooper spray to help them seal (the reason why I use Felpro MLS :D) . Make sure you torque the head in increments. torque to 90ftlb if using ARP lube, 130 if using engine oil.
 
jkstang78

jkstang78

Well-Known Member
#8
#8
MaximumRisk said:
check the head and block to make sure the surfaces are straight.
Are those Cometic head gaskets? if so it is always a good idea to give them a lite coat of cooper spray to help them seal (the reason why I use Felpro MLS :D) . Make sure you torque the head in increments. torque to 90ftlb if using ARP lube, 130 if using engine oil.
Click to expand...
Ok well I was at 80 ftlbs They are Cometic gaskets. When I put the gasket on it was bone dry. No cooper seal or ARP lube. I'm gonig to guess the lube goea on the studs. I honestly didn't realize that I had to do this since this the frist time the motor has been apart in 3 years. I don't have a lot of expreince building motors. But that still doesn't stop me from trying to do it.
 
S

ShelbyGT

Formally silvergt / Member Plus
#9
#9
you really shouldn't need copper sealing spray and 10 ft/lbs of torque won't make a difference like tha problem you had and if you deck and head was warpped that bad the motor wouldn't have ran before the gasket went. i think you had a defective gasket. but on second thought i would also check the bottom of the head for burrs or dents that might be holding the head up
 
MaximumRisk

MaximumRisk

NYC Regional Coordinator
#10
#10
this is what you want to put on the gasket

put a light coat on both sides, wait a minute or two to let it cure a little bit, but not fully dry (it dries fast). Make sure that all the matting surfaces are very, very clean and straight. Put the gasket on, the larger coolant holes are towards the back.
As for the ARP lube, I like to put a bit on the thread and on both sides of the washer.
torque in increments, 30, 65-70, then 90.


PS, almost forgot, put some thread sealant on the bottom studs. They go into the water passages and may leak.

Good luck!!
 
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