Something wrong w my sr

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standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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my s13 redtop has sumthin wrong w it and cant fig out. i have smoke coming out of my exshaust, white smoke. smoke comes out of my blow off valve under boost. when i take off my oil cap white smoke comes out of it. my oil has no coolant in it its just a little dark tho and my second cylinder has like 90 compression. the turbo spools to full stock boost at like 8 or 9 and vacum is fine at 20. anyone know what it is?


Nismo_Freak
Posts: 10314
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 Nissan 240SX

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Sounds like a blown turbo seal for the turbo and for the cylinder, it could be a misseated valve, bent valve, or even a blown piston ring.

If you just got your engine these things are often just what happens for a while (oil in turbo and pipes). Clean out the pipes the best you can. If the oil comes back in quantity then it's definately new turbo time. Check the turbine shaft for play, try to shake it side to side and pull it front to back. There should be very minimal play at most.

The poor compression in the cylinder is something you need to diagnose like a typical low cylinder. Try a ring test to see if the rings are indeed a bit blown in the cylinder (test compression, then add teaspoon of oil through the spark plug hole and retest). What were the other cylinders at in terms of psi?

Did you use synthetic motor oil?

Did you flush the engine completely? Meaning did you run some ATF or oil through it for the first few minutes then change the oil?

How long has this engine been running in your car?

standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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i used 5w 50 w that lucas oil addative. ive put like 2000 milees on the motor the other cylinders are at like 120 and i never flushed.i did disconect the wastegate once.if i take off my valve cover would i see if i had a bentvalve

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Touchdown038
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Joined: Tue Dec 31, 2002 1:55 pm
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The other cylinders are at 120 each? That's pretty damn low.

You could try running Restore through it, I had low compression and it helped me a lot. Of course, I don't know how your turbo would handle it.

standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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whats restore?

standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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i dont think its the rings bcause i never really beat on it except for the time w the wastegate. if mk turbo was leakinging out wouldnt smoke go into my motor thru the intercooler piping and the intake manifold so when i would take the oil cap off it would puff smoke. and when i turned off my car i stared at the turbo and i saw a little smoke but didnt know where it was comin from.

Nismo_Freak
Posts: 10314
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 Nissan 240SX

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DRAIN YOUR OIL IMMEDIATELY

Don't add oil additives to your oil... no more Lucas, it makes the oil frothe up.

Refill the engine with 15w50 Mobil 1, Amsoil, or Royal Purple Oil.

It sounds to me like you have a blown headgasket with the compression being exceptionally low in one cylinder and bad in the others as well.

The turbo could be blown as well you need to check it like I mentioned.

Where did you get your engine from?

Also, by disconnecting the wastegate you effectively might have just blown your engine and turbo. The turbo has no method of control and will just spin as physically possible. This is absolutely HORRID on a turbo and on an engine as well.

standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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oh yea i forgot one important thing. my coil pack wire got disconnected like for 2 days i was gettin no power and i found the problem and fixed it andf new spark plug. i think i had really low compression because the walls of the cylinder were gas soaked so maybe that threw off the compression. and the other ones prob had 120 compression due to that one cylinder. should i flush my motor?

Nismo_Freak
Posts: 10314
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 Nissan 240SX

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Flush the engine...

Re-test your compression, you need to remember to hold the throttle body open while your cranking the engine.

240_Keyy
Posts: 1310
Joined: Wed Dec 04, 2002 6:45 am
Car: '90 240 Fastback
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holy mother of god...

No offense, but you are an idiot. I hate to bash newbies, but with so many people that deserve engines not having one, and you being a total assclown ith yours, I can't help it.

freeboosting the turbo is about the worst thing you can do besides running your car on straight octane booster and nawwz.

I can't believe you man, how could you not know that? :(

standardIdiot
Posts: 8
Joined: Mon Mar 31, 2003 10:51 am
Car: Drifting

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First of all i posted on the website for a little help, not dumbasses tryin to critisize me so shut your mouth. when u were a "newbie" im so sure you were so perfect. go back to highschool to critisize people cause your obviously an immature fag.

Nathan
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Joined: Fri Mar 07, 2003 6:43 am

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Oh come on, he said no offense :D

yellow_jacket
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Joined: Mon Jan 13, 2003 4:43 pm
Car: 95 240sx

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Follow Nismo's advice. I completely agree with everything he has said so far. I think you will find that the compression ring on the head gasket is blown on the cylinder with low compression. Of course your whole motor sounds a little wore out if you are only getting 120psi. I think the lower limit is like 125psi.

240_Keyy
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standardIdiot wrote:First of all i posted on the website for a little help, not dumbasses tryin to critisize me so shut your mouth. when u were a "newbie" im so sure you were so perfect. go back to highschool to critisize people cause your obviously an immature fag.


I got out of high school 5 years ago, so there is no way I am going back.

I was just trying to point out the fact that you basically broke *the* cardinal rule of running a boosted motor, never overboost and underfuel. How could you think that running with the wastegate closed the whole time and boosting like mad on stock injectors was safe? Do you really not know that this is a bad thing? if so, I HIGHLY recommend you give your car (or at least your motor) to someone that has at least a shred of intelligence with a boosted motor.

But to give some real help, do what Nismo freak said, he more or less knows what he is talking about :icesangel

bvanev
Posts: 98
Joined: Tue Jul 22, 2003 4:57 pm
Car: Cars, Snowboarding, photography, Cars

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Standard Idiot, I think that about sums it up. But don't fear, we all make mistakes. There is a book out there that you should read called "Max Boost" this book will give you the basic knowledge that you need to have a turbocharged engine. I will agree that it sounds like you have fried your piston rings and that you have probably either destroyed your turbo. View it as a chance to learn more about the intricate workings of a car and get to work rebuilding it.

DAEDALUS
Posts: 5421
Joined: Mon Jul 22, 2002 8:50 pm
Car: 1990 Infiniti Q45

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Keep it civil, all of you. Everyone does make mistakes, no sense judging the severity. Not all lessons will be cheap. SI there is a lot of knowledge and experience here; you've already gotten some good advice. Bad compression in one cylinder won't cause bad compression in the others, unless they're related by a cracked gasket between the 2. The engine does sound worn out, but if you really don't think this is the case, examine your procedures to make sure you're doing the compression test correctly, and consider that you might have a faulty gauge.


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