420A Compression #'s on stock 420A???

[DSMcrazy3]

Alright, i've been burning oil since about two weeks after my turbo install.. I know my problem is either the turbo seals, or else the piston rings. As soon as hurricane Rita goes past my part of town I plan to run a compression test. I was just wondering what #'s I should look for, if anyone knows off hand from testing themselves.

I appreciate it

 

[ari2gdsm]

According to the haynes Manual. There compression test shows pressure between 250 and 400 rpm. I dont know if this will help but there #'s listed are

Standard 170 to 225 psi
Service limit 100
Difference between cylinders is 25% max.

 

[DSMcrazy3]

Thanks that helped alot, alteast gave me ball park figures to go by anyone with more info on this feel free to add.

 

[XMasta19]

ya really don't wanna be below 160, and of course the lowest reading should be at least 75% of the highest hopefully you don't get any 30's, 50's, and 60's

 

[dr1665]

According to the haynes Manual. There compression test shows pressure between 250 and 400 rpm. I dont know if this will help but there #'s listed are

Standard 170 to 225 psi
Service limit 100
Difference between cylinders is 25% max.

I know I saw that in the FSM somewhere, but I'm too lazy to dig out the old laptop logger to search for it. In any case, thought I would just confirm.

Later.

Oh yeah, and you forgot

 

[DSMcrazy3]

Well I tested her today, comp #'s are as follows

180 180 190 180


Guess it's time for a new turbo eh??

Josh

 

[dr1665]

Well I tested her today, comp #'s are as follows

180 180 190 180


Guess it's time for a new turbo eh??

Josh

Smack it up, flip it, rub it down, OH NO!!!

Pure turbonium for you, sir.

 

[DSMcrazy3]

Smack it up, flip it, rub it down, OH NO!!!

Pure turbonium for you, sir.

LoL....WHAT?!

 

[XMasta19]

TURONIUM

 

[dr1665]

LoL....WHAT?!

Heh. Kids these days.

"Smack it up, flip it, rub it down, OH NO!" Is an early nineties hip-hop reference. (Back when the lyrics meant something and hip-hop wasn't a bunch of mainstream recycled garbage.)

"Turbonium" Was a fictional element name (like Plutonium, Titanium) used by Volkswagon a few years back. There was a scientist-sounding guy in the commercial talking about the discovery of a new element called "Turbonium" in regards to a turbocharged VW model. (Might have been when they started boosting that 1.8L of theirs. Not sure.)

So, those compression numbers look good. I would slap a turbo on that biatch and get freaky with it. Make more sense now? Good. We have an accord.

 

[DSMcrazy3]

haha got it. I found a turbo and I was clairifying that I should have no oil leaks/burning or anything of that sort with it. His response was if my set up was correct I will have no leaks. If it is wrong then no matter what turbo I put on it will leak. Any clue as to the truth of this? My feed and return lines are sealing good, is there anything else to take into consideration??

Thanks,
Josh

 

[ddavisaf]

Are you talking about boost leaks or oil leaks? I'm really confused right now.

 

[DSMcrazy3]

Oil, sry about that

 

[ddavisaf]

You know how everyone says not to use teflon tape?
Use teflon tape, only a little little bit. And only at the top of whatever you're threading. You'll seal just fine and you don't have to worry about it getting sucked into your oil passages. (oil feed line)
For the oil return, just use high temp RTV w/ a gasket.

 

[TimG]

You still could be burning oil from your piston rings or valve seals. Whose to pin-point it's the turbo? A compression test won't tell you everything. A leakdown test will.

 

[DSMxTSi]

Pistons have compression rings and oil rings. You can get great compression #s and still get oil past the oil rings. I know this first hand. Granted, a new turbo could have bad seals but it's doubtful. Since you recently added boost to the engine and now get smoke I'd say it's the rings. A leak down test is the best way to know 100%. Yank that block out and rebuild it to hold more boost. How much boost were you running? The stock block won't hold more than 7-9 psi depending on it's condition/mileage.

 

[DSMcrazy3]

I boosted 4 PSI, the turbo itself wasn't new, I bought it used. I know the seals leak on the turbo, because it comes out of the compressor side. One time my charge pipe popped off of the turbo and oil was on my VC.

Josh

 

[pr0]

Your valve stem seals could be shot if you are still burning oil after you replace the turbo. I got 180 on all four yet it was burning lots of oil and the smoke was blue.

 

[DSMcrazy3]

Well I just got my valve seals replaced about 6 months ago, and everything else with the head checked out, so that should be good.