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Newbie Forum: Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum. Probationary Members must limit their tech posts to this forum and sub-forums.

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Old 08-14-2010, 06:30 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #1 (permalink)
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fresh engine build smokes at idle


Hello, i have a 95 gsx with a fresh 6-bolt engine. My issue is it seems to be burning some oil at idle. I only have 20 miles on so far and the a/f ratio is perfect at idle. The engine has new internals, machine work, and new rings and valve seals. It does not smoke on initial start up but once it starts to idle it smoke pretty good constantly. Once i start driving it stops smoking until it idles for again for a minute. I have had 2 different turbos on it and same result. I do not have a pcv hooked up just the vent to the intake tube. Maybe my rings are not seated yet? Any helpful tips for diagnosis would be appreciated, thanks in advance.


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Old 08-14-2010, 06:40 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #2 (permalink)
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Having the PCV hooked up does help seat the rings
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Old 08-14-2010, 06:48 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #3 (permalink)
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I guess it would by eliminating some of the crankcase pressure, but does my symtoms fall in line with my rings not being seated do you think?

I would tend to think that it would smoke all the time if my rings were not seated yet or properly?

Last edited by dsmjunkie97; 08-14-2010 at 06:50 PM. Reason: Auto-merged with previous post to prevent "bumping" within a 24 hour period Tips on avoiding the auto-merge feature - http://www.dsmtuners.com/forums/faq.php?faq=vb_faq#faq_bumping

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Old 08-14-2010, 08:04 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #4 (permalink)
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it takes atleast 250 miles to have the rings seat in and do not use synthetic oil the rings WILL NOT SEAT RIGHT! after the rings seat then you can use synthetic


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Old 08-15-2010, 01:16 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #5 (permalink)
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Yup. Dino oil thick no rich conditions would be best. Little boost at first lots of on off throttle will help

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Old 08-15-2010, 03:14 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #6 (permalink)
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I see rebuild smoke all the time what kind of assembly lube did you use water based lube will smoke for awhile when first started
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Old 08-15-2010, 07:34 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #7 (permalink)
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Yeah, After my first rebuild of my head I had smoke at Idle also. The shop that built it told me it would take around 150 to 250 miles for it to stop. It finally went away after 180 miles and never had any more troubles with smoke until I upgraded my turbo and blew my headgasket. Did your head gasket set properly. I'm a newbie also, so just a suggestion. Good Luck and hope it clears up for you.

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Old 08-15-2010, 08:22 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #8 (permalink)
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Have you done a compression test? My engine smoked after fresh rings and bearings, didn't touch head. Had oil on piston tops, pulled head and cleaned,lapped valves and installed new valve seals. No more smoke and 175psi across the board! I have less than 100 miles on this engine, car not legal, just a few runs up and down the road.
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Old 08-15-2010, 08:42 AM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #9 (permalink)
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yea jus normal.. "break in" period should be good.. again dont beat it up yet.. let everything relax...
GOOD LUCK and congrats on the build


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Old 10-16-2010, 03:35 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #10 (permalink)
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Well i now have 500+ miles on the build here also with an oil change with non synthetic oil, and it still smokes after idling for a little bit. I can't notice any smoking while driving or under boost but after it stops and ildles for about 45 seconds to a minute it smoke enough to be noticeable, stinky, and blue. It seems as though it is only while the engine is under vacuum. I think i am going to pull the exhaust manifold off and see if any particular runner has signs of burnt oil and go from there. I sure hope it is a valve seal rather than piston rings or a disturbed oil ring.

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Old 10-16-2010, 03:44 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #11 (permalink)
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It took my GSX 700+ Miles for the rings to finally seat to where there was no smoke.

How did you break it in?

You have to be sure to show the engine a good amount of use within the first 50 miles. Take it through every RPM range, let it boost, and use non-synthetic oil. If you don't, then the rings will not seat properly. About 70-80% of the seating process takes place in the first 20 minutes as it has to do with the roughness of the honed cylinders VS the surface of the rings to 'seat' themselves with a sort of fingerprint.

I'd say keep driving it, get on it a little, and see how it acts. Don't use synthetic until after 1000 miles.


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Old 10-16-2010, 04:16 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #12 (permalink)
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When you buy a brand new car, they always tell you that break in is 1500 - 2000 miles. You're supposed to be "easy" on the car during this time so everything can seat nicely and whatnot. I would say wait another 500 miles and see if it stops smoking.
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Old 10-16-2010, 04:41 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #13 (permalink)
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When i first broke it in i did light throttle cruising, did a few low boost pulls, and i was all over the rpm range on non synthetic oil.

I will definitely take your advise and drive it another 500-1000 miles and see what happens, i also just flat out never drive the darn thing because i have a company car. It took 2 months at least to put 500 miles on it but i will take it on a long road trip and around and hopefully i'll get lucky and everything will seat properly.

Last edited by dsmjunkie97; 10-16-2010 at 04:44 PM. Reason: Auto-merged with previous post to prevent "bumping" within a 24 hour period Tips on avoiding the auto-merge feature - http://www.dsmtuners.com/forums/faq.php?faq=vb_faq#faq_bumping

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Old 04-18-2011, 02:25 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #14 (permalink)
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Quote:
Originally Posted by XiKeiyaZI View Post
It took my GSX 700+ Miles for the rings to finally seat to where there was no smoke.

How did you break it in?

You have to be sure to show the engine a good amount of use within the first 50 miles. Take it through every RPM range, let it boost, and use non-synthetic oil. If you don't, then the rings will not seat properly. About 70-80% of the seating process takes place in the first 20 minutes as it has to do with the roughness of the honed cylinders VS the surface of the rings to 'seat' themselves with a sort of fingerprint.

I'd say keep driving it, get on it a little, and see how it acts. Don't use synthetic until after 1000 miles.
This is exactly right. You have to do this to get the rings to seat properly. You can't baby it and expect great results.
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Old 04-18-2011, 02:56 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #15 (permalink)
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Grats on the new engine. I'de be worry free for at least the "break in' period. Anything after that would be a red flag.

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Old 04-18-2011, 03:52 PM Show Printable Version Show Printable Version   Email this Post to a Friend Email this Post      #16 (permalink)
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give it more time. they'll seat. we have some very knowledgeable guys on here.

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