compression test :(

[Boosted_talon98]

I was just wondering how this sounds... I did a leakdown test on #1 at TDC and air was coming outta oil cap and I could hear it going past rings and in oil pan... I paid 2500 for this block at a machine shop last year put like 3000 miles on weisco 8:8:1 .20 over, eagle rods, acl main and rod bearings, best machine shop around my area... About a year ago pulled it out to swap into new shell.. let it sit for a year on a stand.. . I got the head built put it back on and now this.. Is this something I could have done by running it rich. I ran break in without front o2 ...

Results- 18 - 1
150- 2, 3, 4... I put a few drops of oil down spark plug whole and it went to 130 then back to 20ish then back to 130 did another leak down still heard leak even after oil. A retard would ask if it was the rings so I am gonna ask but I am in shock if it is the block is fairly new and completely assembled by machine shop

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[bullettdsm]

Sorry, but by the info you give, you are a shocked retard.

Yeah, break-in without a front O2 is not a good idea. You would be running rich and the fuel would act as a lubricant between the rings and the cylinder wall (though not necessarilly washing out the cylinders). This would affect the friction needed to seat the rings to the walls.

BUT, I'm thinking that with the results you give, that there is more going on than that.

MB

 

[Boosted_talon98]

block was broke in but then I pulled it out and let it sit on a stand for over a year and then when I put new head on now this? so IDK.. Compression test is not consistent at all it jumps from 30 to 120 or 20 and 130 just different numbers. ussally it says 15-30 like 4 or 5 times then it will say 120 ish...

Air is coming from oil cap when I do leakdown test is cyl 1.

I did pull some codes.. p0403, p0443, p0352, p0351, 1294, p1495, p0301

 

[bullettdsm]

Compression test is not consistent at all it jumps from 30 to 120 or 20 and 130 just different numbers. ussally it says 15-30 like 4 or 5 times then it will say 120 ish...

Consistent with a broken ring land that's sitting in there like a loose tooth flapping back and forth.

MB

 

[#40Fan]

Maybe, just maybe a sticking valve? New head....could have f'd up a guide and it is holding too tight.

 

[Boosted_talon98]

Maybe, just maybe a sticking valve? New head....could have f'd up a guide and it is holding too tight.

hmmm does anything look funny in this pic?

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thats only after like 30 minutes of idling.. I def am running pig rich on the 3 other cylinders.. I am running -6an supply, aeromotive 1:1 afpr and walbro on stock injectors to break this head in what should I set my fuel pressure. I had it on 53 thought that was stock but wow its running so rich

 

[bullettdsm]

Results- 18 - 1
150- 2, 3, 4... I put a few drops of oil down spark plug whole and it went to 130 then back to 20ish then back to 130 did another leak down still heard leak even after oil. ]

These numbers do not jibe with your other thread.................

MB

 

[Boosted_talon98]

These numbers do not jibe with your other thread.................

MB

Yea funny thing my compression tester was bad so I used another one and got these results...

 

[rx7ttlm]

First the head looks funny to me, second it sounds like you may not have been at TDC with the valves closed for your 2,3,4 leak down tests.

First make sure you have a damn gauge that works right.

The valve in the bottom pic looks like it got its ass kicked somehow. Or its just a light trick.

So here's what I would do. Pull the valve springs and get some Prussian blue and a valve lapping kit. You can get them from most auto parts stores. Lap the valves and see if all of the valves make good contact. Sometimes if the dumb asses that do the head don't install valve guides correctly the valves don't seat properly but it makes it look like they are when the 90 lbs of installed height pressure helps the valve seat. So check the valves and seats and make sure there is a uniform ring where the valves touch the seats.

Next check the valves fit in the guides, each valve should slide nice and smooth in the valve guide with minimal pressure. I do it with one finger on each end of the valve.

After that checks out its time to look at the bottom end. Pull the pistons and rods and have a peak at them. Looking for damage around the ring lands and the skirts. NOTE DIRECTION of install and rod cap / bearing orientation



Figured out why your head looks funny.. cause its NA ha ha ha ha.

 

[vzeoh6om]

you can do what rx7 had suggested or if you want u can just pull off the manifolds and fill the ports with water and look if anything is leaking thru the valves...if you dont feel like removing your valve train..

 

[Boosted_talon98]

I can move all 4 pistons if I touch them and apply pressure they have just alittle bit of play... Are pistons suppose to be in there tight and not move at all.. I have weisco I think they are like hypo genic or something so maybe the machine shop thought they were forged and would grow with heat IDK how to check clearances.

I do not have the tools to take head apart do I just pour water right in ports and let sit or if no leaks then drain? I assume the machinist did a vaccumm test on the head IDK.. I hate life right now got my 420a turbo with a 35r and I cant even drive it

 

[habitatguy187]

what should I set my fuel pressure. I had it on 53 thought that was stock but wow its running so rich

37.5 for a manual 43 for an auto.

 

[9!'clipseDOHC]

Yeah that fuel pressure was through the roof! Disconnect the vacuum line from your FPR and pinch it shut, then set it at 37. It should be around 28-30 with the hose on.

 

[96TurboGS]

Remember guys this is a 420a. Stock fuel pressure is ~50. Whenever you add cams like crower 3's you will be pig rich on a stock PCM. Best option he has is to get everything sorted out and use megsquirt to control idle, fuel, and spark.

 

[habitatguy187]

Remember guys this is a 420a.

Totally missed that.

 

[Boosted_talon98]

Totally missed that.

Lol. So the crower 3s r dumpin fuel in at idle should I still be runnin 50 ish with a 6an supply

 

[Boosted_talon98]

Wow so I dropped block off at machine shop and they said everything appeared to be in workin condition. They say maybe weisco gave me a defective piston. So uhh I am in shock if I didn't have so much blood sweat and tears from over expensive parts I would effin give it away.....Already ####ing missed carlisle prob miss thee shoot out and buds creek to someone hold me

 

[VelocitàPaola]

Please don't start multiple threads on the same topic. I've merged your new thread here.

 

[red1993gsallmt]

hmmm does anything look funny in this pic?

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thats only after like 30 minutes of idling.. I def am running pig rich on the 3 other cylinders.. I am running -6an supply, aeromotive 1:1 afpr and walbro on stock injectors to break this head in what should I set my fuel pressure. I had it on 53 thought that was stock but wow its running so rich

You may have washed the rings

 

[Boosted_talon98]

It almost seems like that's the only explanation

 

[bullettdsm]

You may have washed the rings

Highly unlikely. You would still have some show of explosion and it wouldn't just wash out one cylinder and you would have a few extra quarts of oil in your oil pan, .

Did I read that you had C3's in there? That would definitely run you rich. You also have to remember that you are just starting to break in the rings. You will have dark chambers at first. The look is just amplified by the cylinder being so clean.

Who put the engine together? Because this question comes back around;

So was it your cam timing ? As Ryan alluded to, from the looks of your comp numbers you could have had a cam timing problem.

MB

I do question the machine shop asking whether or not you got a defective piston from Wiseco. If they did their measurements, they should be able to answer that. 0 comp is basically a huge blow-by area somewhere. If your valves were open in that chamber when your spark took place, then this is a possibility.

Any pics of the bottom end by any chance?

MB

 

[Boosted_talon98]

Yes sir. I can't figure out how to upload from my phone I will get pics after I get off work prob by 9am tomorrow. The best machine shop in the area put it together and I broke it in fine I thought

 

[vzeoh6om]

I do not have the tools to take head apart do I just pour water right in ports and let sit or if no leaks then drain? I assume the machinist did a vaccumm test on the head IDK.. I hate life right now got my 420a turbo with a 35r and I cant even drive it

yea exactly let the water sit and watch to see even if it drips

 

[Boosted_talon98]

I dropped everything off at the machine shop so I didn't get any pics of the cylinder wall just the pics of the block after the first rebuild last year are like in the first post...

yea exactly let the water sit and watch to see even if it drips

ok I did this and no leaks then machine shop said it was good but the way the other machine shop did it actually caused me to lose power because he cut it out wrong and air was going up and hitting top of port and causing to much turbulence