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blue smoke on over-run
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Old 02 Dec 2008, 11:41 PM   #1 (permalink)
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blue smoke on over-run

WELL......I finally got hold of and fitted a turbo back decat pipe to my '94 wrx on saturday and also treated it to an oil change. Have to say was feeling pretty chuffed about it all when i happened to glance in the mirror after coming down over a hill having not touched the throttle for a bit and noticed a big curl of blue smoke as i touched the throttle
Pissed right off about it all to be honest, the car has never missed a beat and didnt smoke at all prior to saturday so i can only assume the oil never made it passed the cat.
NOW THEN, i'm thinking the -5 40w fully synthetic oil that was recommended to me may be too thin although obviously this can't be the root cause can it? There must be wear there in the first place Shirley? It doesn't smoke at any other time ( on boost, gear change etc ) just over-run.
I'm guessing at either valve stem oil seals or oil control rings on the pistons?
The problem now is i'm stuck between a rock and a hard place as potentialy by the time a garage find's what's up with it it could cost me a wedge so have looked into it a reconditioned engine from smr engines which will cost about 800 delivered for an engine that's guaranteed for 6months.
This is all well and good but on one hand it's a waste of money as the car isn't worth much in the current climate and i was saving toward a type-r hopefully in about 6month's.
On the other hand i am a sentimental tw*t and i like my car and there's nothing to say i couldn't spend 6k on a newer car to have similar problems 6months later! ARRRRRRRGHHHH What to do? I either sort mine and keep it for a few years or get rid of it rather than waste cash on it.
Sorry to ramble on but my head hurts lol.
Any opinions on what's causing the smoke or views on what you would do in my opinion would be appreciated!
Tom.
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Old 03 Dec 2008, 09:49 PM   #2 (permalink)
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Re: blue smoke on over-run

Strange that it not blowing blue smoke on boost cause if burning oil it would definetly do it then cause thats where all the power is should go away and check the oil before and after you take it out and see how much oil it really is burning do a compression test that will give you a more accurate diagnostic.......................
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Old 04 Dec 2008, 12:00 AM   #3 (permalink)
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Re: blue smoke on over-run

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Originally Posted by stiimpreza1984 View Post
Strange that it not blowing blue smoke on boost cause if burning oil it would definetly do it then cause thats where all the power is should go away and check the oil before and after you take it out and see how much oil it really is burning do a compression test that will give you a more accurate diagnostic.......................
Yeah, that's what i thought! It's a bit of a wierd one as i've never noticed it smoking at all before yet since fitting decat and oil change it's very noticable.
Thank's for advice though, recon a compression test will be the way forward!
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Old 04 Dec 2008, 12:14 AM   #4 (permalink)
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Re: blue smoke on over-run

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Yeah, that's what i thought! It's a bit of a wierd one as i've never noticed it smoking at all before yet since fitting decat and oil change it's very noticable.
Thank's for advice though, recon a compression test will be the way forward!
Well if you were to do a compression test and say the 4cyclinders are low on pressure that means that piston rings and or cyclinders worn hence the burning oil but you say this is only happened since you fitted the decat pipe is that right???????
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Old 04 Dec 2008, 12:34 AM   #5 (permalink)
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Re: blue smoke on over-run

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Well if you were to do a compression test and say the 4cyclinders are low on pressure that means that piston rings and or cyclinders worn hence the burning oil but you say this is only happened since you fitted the decat pipe is that right???????
Yup, never missed a beat or smoked at all prior to saturday! I treat the car to a decat and an oil change and THIS is how it repays me lol. My only thought is perhap's it has alway's burnt a bit of oil but previously the cat was taking care of it?? Wiered one hey!
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Old 04 Dec 2008, 12:38 AM   #6 (permalink)
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Re: blue smoke on over-run

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Yup, never missed a beat or smoked at all prior to saturday! I treat the car to a decat and an oil change and THIS is how it repays me lol. My only thought is perhap's it has alway's burnt a bit of oil but previously the cat was taking care of it?? Wiered one hey!

The joys of motoring ha ha strange alright you sure it didnt burn oil before you decatted and how much on dipstick is it burning??????
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Old 06 Dec 2008, 09:09 AM   #7 (permalink)
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Re: blue smoke on over-run

Bit late with the reply, but i do remember someone else having this problem just after an oil change and turned out they over filled with oil. Worth checking the oil level as it's only started since oil change. If it is the case the drain a little out, check levels and see how she goes.
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Old 08 Dec 2008, 07:15 PM   #8 (permalink)
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Re: blue smoke on over-run

ive had that happen b4 down to worn valve stem oil seals , and once the wrong oil, think i picked up the wrong 1 in the lock up and it was to thin haha lol
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Old 08 Dec 2008, 10:05 PM   #9 (permalink)
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Re: blue smoke on over-run

PLEASE DO NOT BUY ANYTHING FROM SMR, MDKL, OR PRESTIGE PARTZ ITS ALL THE SAME PLACE AND A BUNCH OF RIP OFF MERCHANTS!!! I GOT MY ENGINE FROM THEM, THEY LOOK NICE BUT I GOT A NASTY SUSPITION THAT THERE STOLEN TO ORDER?? AS PROMISED NEXT DAY THEN TURNED UP WEEKS LATER, AND THEN WHEN IT DID EVENTUALLY ARRIVE IT WAS FOOKED AND HAD TO SEND IT BACK!! GOT A GOOD ONE IN THE END, BUT HAVING TROUBLE CLAIMING MY EXTRA LABOUR CHARGES BACK FOR HAVING TO FIT 2 ENGINES. STILL NOT GOT A RECIEPT EITHER AFTER NEARLY 4 MONTHS!! JUST BE CAREFUL MATE!!
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Old 11 Dec 2008, 11:38 PM   #10 (permalink)
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Re: blue smoke on over-run

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PLEASE DO NOT BUY ANYTHING FROM SMR, MDKL, OR PRESTIGE PARTZ ITS ALL THE SAME PLACE AND A BUNCH OF RIP OFF MERCHANTS!!! I GOT MY ENGINE FROM THEM, THEY LOOK NICE BUT I GOT A NASTY SUSPITION THAT THERE STOLEN TO ORDER?? AS PROMISED NEXT DAY THEN TURNED UP WEEKS LATER, AND THEN WHEN IT DID EVENTUALLY ARRIVE IT WAS FOOKED AND HAD TO SEND IT BACK!! GOT A GOOD ONE IN THE END, BUT HAVING TROUBLE CLAIMING MY EXTRA LABOUR CHARGES BACK FOR HAVING TO FIT 2 ENGINES. STILL NOT GOT A RECIEPT EITHER AFTER NEARLY 4 MONTHS!! JUST BE CAREFUL MATE!!

Ah bugger, it was prestige parts that i'd sized up on gay bay. That's a pain to hear that mate, they look so genuine too! Not the cheapest i've seen but i thought perhaps if you spend a little more it may be the way forward long term. Back too the drawing board it is then.........
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Old 12 Dec 2008, 01:00 PM   #11 (permalink)
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Re: blue smoke on over-run

im in a similar situation now, although mines just wear and tear cos of how tweeked up it is.

basicly im not even considering a second hand engine, never know how good they are, the history or how well they've been looked after.

so rebuild is by far the best option, a basic rebuild starts around 2.5k iirc then iof you want to tune it up, well how bigs your wallet lol
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Old 15 Dec 2008, 10:11 PM   #12 (permalink)
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Re: blue smoke on over-run

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im in a similar situation now, although mines just wear and tear cos of how tweeked up it is.

basicly im not even considering a second hand engine, never know how good they are, the history or how well they've been looked after.

so rebuild is by far the best option, a basic rebuild starts around 2.5k iirc then iof you want to tune it up, well how bigs your wallet lol
Money's not the problem ( although believe me, i'm not floating in an ocean of the stuff!! ) but it more a case of is it worth spending that sort of money on a '94 wrx! I could bin mine off and put the rebuild money towards buying a type-r........but then knowing my luck i'd have it for 5 mins and it'd blow up or summin lol.
Am gonna drop the oil from mine soon as i get the chance and put a bit thicker stuff in and see if this cures it. Am currently running -5 40w fully synthetic as recommended to me by my local auto component shop. I'm thinking they are a bit retarded because everyone i mention -5 40w oil to looks at me as if i've stepped in shit and walked across their carpet! Am gonna refill with 10 40w as i've previously used with no problem's and see how it goes!
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Old 15 Dec 2008, 11:10 PM   #13 (permalink)
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Re: blue smoke on over-run

Run 15w50 in mine and always will, Mobil 1 motorsport/silkolene Pro R/and for the last couple of yr motul 300v Never had engine issues.


Blue smoke on over runs normally the turbo or early signs of it,take an intercooler hose off an look inside how wet the pipe is, light vapour and small amount of oils pretty normal you`ll recognise it if its excessive.

Should ya want a 2nd hand engine ever david at API Engines will take some beating(reliable).(decent bloke aswell)

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Last edited by uk dave; 15 Dec 2008 at 11:12 PM.
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Old 15 Dec 2008, 11:48 PM   #14 (permalink)
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Re: blue smoke on over-run

Thanks for that mate, API just been added to my favourites although am hopefull that dropping the oil for some thicker/correct oil will help and hopefully cure the problem! Nothing to lose by trying it and the more i think about it the oil i was 'recommended' was thinner than water! Well, just about lol so it would seem very coincidental that i now have a smokey scoob. We'll see..........
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Old 17 Dec 2008, 12:12 AM   #15 (permalink)
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Re: blue smoke on over-run

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Originally Posted by uk dave View Post
Run 15w50 in mine and always will, Mobil 1 motorsport/silkolene Pro R/and for the last couple of yr motul 300v Never had engine issues.]

That 15w 50 300v is great stuff isnt it use have that in my type r integras i used 10w 40 before the motul and they murder for burning oil that was untill i used the 15w 50 wasnt burning harly any as its thicker and car felt prepier
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