all sorts of issues, low/no compression one of them

[Empyrials]

ok so i just got this car a couple months ago and have been slowely putting it together. Either way i decided to do a rebuild because it had Low compression to begin with... I sent the head to the shop and they said 2 valve guides were shattered and i needed 5 valves. Ok got them replaced. New HG/Gasket kit etc.

While i had it apart i noticed the cylinders looked almost like a mirror (with Wiseco Piston & eagle rods just being, motor had less than 5 miles) i figured i'd hone the cylinder walls because the previous owner obviously didn't. Everything come out to spec but i replaced the bearings anyways, why not.

well got it all back together with DSMlink v3 and a GM maf and i've had problems getting this thing to start. I have fuel & spark. My compression is 175 2 50 40 . with it being new rings and i've only gotten the motor to start for about 5-10 mins this is still to low correct?


EDIT: Oh that is a COLD compression test as i can't get it to run atm

 

[1timehondalover]

2 lbs. of compression in cylinder 2?

If possible perform a leakdown test, it will give you the answer to your problem.





Did you bleed the lifters when you reinstalled the head? I've seen pumped up lifters case the valves to hang open and cause loss of compression.

Any chance you improperly timed the motor?

 

[Empyrials]

2 lbs. of compression in cylinder 2?

If possible perform a leakdown test, it will give you the answer to your problem.





Did you bleed the lifters when you reinstalled the head? I've seen pumped up lifters case the valves to hang open and cause loss of compression.

Any chance you improperly timed the motor?

ya 1-3 psi in cyl 2, it hardly showed up. with oil it only went up to about 10 tops

yes i did bleed all the lifters, i double checked each one. i did have the timing 1 tooth off(looked right, damn 1g is at an angle compared to my old 2g ) that's corrected now.

I'm already trying to find someone in town with a leak down kit and i have a friend with a air compressor. But i was just making sure that's not normal even though the rings haven't been broken in.

 

[1timehondalover]

ya 1-3 psi in cyl 2, it hardly showed up. with oil it only went up to about 10 tops

yes i did bleed all the lifters, i double checked each one. i did have the timing 1 tooth off(looked right, damn 1g is at an angle compared to my old 2g ) that's corrected now.

I'm already trying to find someone in town with a leak down kit and i have a friend with a air compressor. But i was just making sure that's not normal even though the rings haven't been broken in.

If you're having that much compression loss you shouldn't even need a gauge. You can take the plug hose from a compression tester and apply shop air to it. If you're only holding what you say you are on a compression test you'll be able to find the problem very easily.

If you hear air coming out the exhaust you have bent exhaust valves.
If you hear air coming out the intake pipe you have bent intake valves.
If you hear air coming out the oil fill hole or dipstick your rings are toast.

Good luck.

 

[Empyrials]

If you're having that much compression loss you shouldn't even need a gauge. You can take the plug hose from a compression tester and apply shop air to it. If you're only holding what you say you are on a compression test you'll be able to find the problem very easily.

If you hear air coming out the exhaust you have bent exhaust valves.
If you hear air coming out the intake pipe you have bent intake valves.
If you hear air coming out the oil fill hole or dipstick your rings are toast.

Good luck.

so i was finally able to borrow an air compressor, first cylinder was as expected with having good psi on compression but i still wanted to test it to see what a good cylinder sounded like.

the other 3 leaked horribly all through intake and exhaust valves, even though i JUST had the head done sucks ass.



Either way i'll call the shop tomorrow to make sure they'll look at it and fix it. However my friend said i should ask that they cover the cost of my head gasket and to put a new one one, Even though it's new and has only been torqued down but not really ran? Or can it be reused? It's a OEM head gasket

 

[ba109296]

The lifters might not have pumped up.. Sometimes they don't pump up for a few hours or up to a few days.

I would recheck your physical timing right away.