Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

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Old Sep 1, 2010 | 06:13 PM
  #1  
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Icon6 Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

My Integra started burning oil one day and by the time I got it home It looked like I hit the smoke button on that old school spy hunter game while i was running down the highway. It still ran like a champ before i started figuring it out except for the occasional stall while letting off the gas. I pulled the exh. manifold cause i thought my turbo blew a seal and found oil coming out of the #1-3 ports. those plugs were also fouled out. Did a compression test and here are my results:

#1 35 psi
#2 40 psi
#3 0 psi (yes i mean zero)
#4 25 psi

So my question is does anyone know what the compression is supposed to be? Im almost positive its a piston ring issue but I welcome suggestions. Here are my specs:

Engine
obd1 b18c gsr block Dart MID sleeves bored .to 2.0L and o-ringed
JE low compression (dished) pistons on golden eagle rods, stock gsr crank
Moroso 5.5 qt oil pan.

Head
p72 gsr head, gsr cams with skunk2 wheels set at O deg
ARP studs, cometic head gasket

Thanx in advance and yes i did try to look this up but couldnt find anything.

Before this all happened it was putting out 319hp at the wheels.
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Old Sep 1, 2010 | 08:33 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

either you did your compresion test wrong or you have no rings at all in either cylender
your compression should be low mid 100s
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Old Sep 2, 2010 | 05:44 AM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Who did your motor?
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Old Sep 2, 2010 | 01:39 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

This one was done by Carter Racing in Savannah, GA
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Old Sep 2, 2010 | 01:57 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Yeah you either did it wrong or there is a huge problem
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Old Sep 2, 2010 | 02:08 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

After learning the proper way to perform a compression test (at WOT) I now have new numbers to report:

#1 80psi
#2 90psi
#3 85psi
#4 82psi

Does this sound reasonable or is it still too low?
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Old Sep 2, 2010 | 02:16 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

its pretty steady actually
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Old Sep 2, 2010 | 02:21 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

So then would valve guide seals be responsible for a 3qt oil loss in ten miles? Am I still looking at a big problem?
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Old Sep 2, 2010 | 02:24 PM
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From: KS
Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

turbo seals would pull the i.c. pip and see if its wet inside the outlet of the turbo that goes into it
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Old Sep 2, 2010 | 02:30 PM
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From: KS
Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

or the downpipe as well either will tell you if the turbo seals are gone
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Old Sep 2, 2010 | 02:35 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Facepalm.
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Old Sep 2, 2010 | 02:39 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Just checked.. Yes there is. So its my turbo thats the problem? Where would i get seals replaced on an old turbonetics t3/t4? the one that came in the old Integra/Civic kit? Also does this mean i have to take my intake manifold and head off to clean all the oil?
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Old Sep 2, 2010 | 02:44 PM
  #13  
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

i guess it makes sense #4 runs dry cause its too close to the throttle body to get oil. Since its also the runner that gets the least air.
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Old Sep 2, 2010 | 03:02 PM
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From: KS
Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

i have an old turbonetics t3/66 and had the same issue i called turbonetcis and got a rebuild kit for like 130 bux man

there are also instructions on the faq forum to guide you through the rebuild
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Old Sep 2, 2010 | 03:04 PM
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From: KS
Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

this guy really has fun with this also

https://honda-tech.com/forums/forced-induction-16/how-rebuild-your-own-turbo-like-ghetto-scientist-1397101/
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Old Sep 4, 2010 | 04:18 AM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

If you suspect your turbo shaft seals to be at fault, try to remove the oil supply line to the turbo and let the car idle.just make sure you plug the line so it won't leak oil when oil pressure is up.check if the smoke is still evident.do this for a short period of time only so as not to coak the oil-starved shafts.
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Old Sep 4, 2010 | 03:49 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Im positive its the turbo seals. I had a quart of oil in the intercooler. thanx for the help guys. Thinking about going with an ebay turbo just to get it on the road till I can get a quality one. My local turbo shop wont work on a turbonetics turbo unless I come up w/ the parts. Dont know why.
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Old Sep 5, 2010 | 05:25 PM
  #18  
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Try to restrict oil pressure supply to the turbo so as not to blow them seals out.
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Old Sep 5, 2010 | 05:46 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

no offense here, but your compression should be at least double what it is. regardless of how even it is, there is something else going on.
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Old Sep 5, 2010 | 10:13 PM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Originally Posted by blackeg
no offense here, but your compression should be at least double what it is. regardless of how even it is, there is something else going on.
well that kinda all depends on what kind of compression tester he used also .. i knew right from the door when he first did the test he didnt hold the throttle body open
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Old Sep 6, 2010 | 09:59 AM
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Gauge maybe be off.. Try a diffent one
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Old Sep 7, 2010 | 04:39 PM
  #22  
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

The tester I used was from o'reileys auto parts. Actually used 2 different ones. Only threaded the tester in hand tight cause theres no way to get a tool in there if it got stuck so maybe I lost a little there. I didnt have a restrictor on the lubrication line so im pretty sure it was just my turbo seals. Remember im running LOW compression pistons. I ordered a new turbo and its on the way so I'll let you guys know whats up when I get it running again. Thanx for all the help.
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Old Sep 9, 2010 | 05:32 AM
  #23  
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Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

you would have to be running like a 7:1 piston to have 80 psi be its corresponding compression. my motor is 9.5:1 and it cranks over 205 with 15% leakdown.

my daily driver integra with 213k miles cranks over 180 on a 9.2:1. (now you cant go comparing my motor to yours exactly, but you can use it for a ballpark idea)

you are right, the lack of restrictor could very well be causing burning oil. however i do not see how it could create lower than spec compression.


dude, do a leakdown test
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Old Sep 9, 2010 | 02:56 PM
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From: Blaine Washington
Default Re: Need help! Compression on a b18c sleeved_bored to 2.0? (searched)

Originally Posted by I.C.C.
Facepalm.
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