Re-ringing the pistons....

[gerardojdm]

^^ while leaving the motor in the car. Well long story short, My compression on one cylinder is at 60 psi!! I didn't bothering checking the rest and did a wet test on the same cylinder. Doing so I got 90-100ish psi. Could it be bad rings or just that it's been sitting for nearly 9-10 months?

My current set-up is Boosted Ls/vtec. A year ago I got it build and then took out the swap to paint the car in and out. The motor sat for nearly 9-10 months. It was tuned and maintained (Fluilds)and Oil pressure is good.

Specs:
Je/SRP 10:0:1
Eagle Rods
ARP Rod bolts
ACL bearing
3-layer head gasket

I don't think it's bent valve because I also did a wet compression test. Now my friend told me to Re-ring the pistons. Im not trying to be cheap I just can't have my car down any longer after almost a year of working on it and not having a car.

My question is, would you suggest getting the pistons re-ringed without disassembling the motor? What I mean is opening the head and doing it from the bottom end. My friend said I could probably reuse the bearing if they are good but I'll rather buy new ACL bearing. What do you think?

Thanks, gerardo

[SPOOLIN]

You will never get that ring to seal properly doing it that way. It will probably work but it could turn out to be a huge waste of time.

[NJSC]

Well I know that if a motor sits for a while your rings could not be seating properly. Fill the cylinders with oil and leave it 24hrs. It may solve your problem.

[SPOOLIN]

thats not going to fix a ring sealing problem, oil isn't a magic juice that removes corrosion once its there.

[NJSC]

Well I just swapped the motor in my 325 and it low compression filled the cylinders up with oil, next day it was perfect. Worth a shot

[SPOOLIN]

oil will always raise compression numbers. oil is slung on your cylinder walls anyways and that aids in keeping compression consistent.

[josh green]

I have heard of people using Marvel mystery oil on and engine BEFORE trying to turn it over. Letting it sit for a day or so I would imagine.

[SLow_POke]

before putting it together did the measure the cylinders? I think you should just do it right the first time.

[gerardojdm]

Ok people, I finally got the car runnung and the compression shoot up to 180 all across. I guess the compression was low from having my car sitting for almost a year.. Thanks people now i need to tune

[EmminoDaGreat]

I disagree w/ you spoolin, you can get a ring to seal properly w/o it being pulled. I have done it many times.