Another compression question

[eclipsalon]

So I blew my head gasket on my 2g about 2 months ago and now im getting a compression of 140 across the block.
First off let me say that before the gasket blew I was at 180 on all 4. When I put it back together I DIDN'T get the head resurfaced nor did I use new head bolts. When I did a wet test it only jumped up 25 psi. Main question is how much of a difference, between wet and dry, would u be able to tell if u need new rings?
Motor only has 998?? miles but 200 miles ago it was good. I read if the compression readings are even across then its usually just motor wear, but im hoping it might be the head bolts are no good or something easy. What do you guys think? Rings or other?

 

[BogusSVO]

How did the HG fail?

What caused the the blown HG? Overheating?

Have you checked the timing marks to make sure they are correct?

Before you jump to the rings being bad, run a leak down test.

 

[talonDSMerr]

Using oil to test the rings for wear isn't very reliable for our engines. For engines with domed or flat piston tops it would work, but our pistons are dished, so oil that is poured into the cylinders will pool at the top of the piston. Since oil is essentially non-compressible and it takes up room in the combustion chamber, compression numbers will always go up whether or not your rings are worn.

What head gasket was on there when you blew it? What headgasket did you replace it with?

 

[eclipsalon]

Hg fail while I was tuning it on 20psi. It was running as perfect as possible when it popped and I was surrounded by smoke. Lol kinda. I have triple checked it to make sure everything is lined up.
also I had a felpro hg and replaced with the same from oreilly.

 

[Calan]

It was running as perfect as possible when it popped

At only 20 psi...no it wasn't.

...replaced with the same from oreilly.

MLS or Composite?

 

[eclipsalon]

At only 20 psi...no it wasn't.

Lol. Its only a stock 14b. And I think it was mls not very sure just sounds familiar.

 

[BogusSVO]

Well if the HG popped when you were tuning, I would say you ran lean and fried the HG, IF that is the case you may have warped the valves and they are not seating properly.

Run a leak down test to confirm.

 

[eclipsalon]

Will do the leakdown, but I was watching the afr the whole way and it was at 11.5

 

[Calan]

When I put it back together I DIDN'T get the head resurfaced ...I think it was mls

...nor did I use new head bolts.

Pick either one. Both are just as likely to be the reason that you are having problems now.

*****

How can you not remember what type of HG you used, especially if you know for a fact that you didn't resurface the head?

 

[eclipsalon]

The box said felpro that's all I know. Also was too sure if it was the resurfacing since the first time around it didnt make a difference. (2nd hg )

 

[BogusSVO]

How was the head surfaced before? do you know?

If/when you pull the head, post some pics.

 

[eclipsalon]

pics of the head? coming soon

How was the head surfaced before? do you know?

If/when you pull the head, post some pics.

1000grit wet sandpaper!!

 

[gusu]

MLS stands for Multi-layered Steel. Either it was made of steel or it wasn't. So there you go.

I think the other two are cometic and composite.

 

[Anubis_4_99]

pics of the head? coming soon



1000grit wet sandpaper!!

I just threw up in my mouth a little

That is probably your entire reason for failure right there. Sandpaper is no where near a good way to resurface the head. It needs to be machined, so it can be a 100% truely flat surface.

If you did this, then used a MLS gasket, i'm surprised it lasted that long.

MLS stands for Multi-layered Steel. Either it was made of steel or it wasn't. So there you go.

I think the other two are cometic and composite.

Another way to normally tell, is the MLS seems to normally be about half the price of the composite gaskets. My composite gasket ran about $50, the MLS was priced right around $27.

 

[eclipsalon]

It was 40 bucks

 

[BogusSVO]

pics of the head? coming soon



1000grit wet sandpaper!!

Not right... at all....

http://www.dsmtuners.com/forums/new...face-4g63t-cylinder-head-mls-head-gasket.html

http://www.dsmtuners.com/forums/cyl...0613-why-not-let-your-head-belt-surfaced.html

 

[BogusSVO]

Another way to normally tell, is the MLS seems to normally be about half the price of the composite gaskets. My composite gasket ran about $50, the MLS was priced right around $27.

That is backwards

Fel-Pro # 26186PT Is MLS My local cost is $44

Fel-Pro # 9627PT is a composite Local cost is $33

 

[eclipsalon]

Not right... at all....

http://www.dsmtuners.com/forums/new...face-4g63t-cylinder-head-mls-head-gasket.html

http://www.dsmtuners.com/forums/cyl...0613-why-not-let-your-head-belt-surfaced.html

, awesome!! btw

 

[Anubis_4_99]

That is backwards

Fel-Pro # 26186PT Is MLS My local cost is $44

Fel-Pro # 9627PT is a composite Local cost is $33

My local is backwards for whatever reason then. I can pick up a fel-pro MLS at autozone for $35, and i had to special order my composite for a cost of $55.

 

[eclipsalon]

so everything is back on. Bled the lifters aslo before i put them back in because they were really hard except for to which were really soft. i took the head the get machine surface, they said it wasnt that bad. Bought a new gasket, according to ^Anubis' part #s its a composite. Unfortunately, i had to reuse the same head bolts for the THIRD time. Its not all my fault tho because "the 6bolt and the 7bolt studs are the same" says the guy i bought some arps from. -this is false.
6bolt head studs are 12x1.25
7bolt head studs are 11x1.25.
BTW, the compression did bump up 20psi! still not were i want it but better. Maybe when i get some new studs itll help it some more.
ps now im on 160 across.