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Old 29-10-2019, 14:58   #1
edbowles86
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Blue / white smoke during track day

Hi guys

I went on my first track day with my Evo V a couple of weeks ago. Had a great time, and loved learning how good the car was round the track. My brother came with me and when he was following me, he noticed the odd occasion where blue smoke was coming out the exhaust. The first link is of his camera on the back of my evo and the second is him following me. You can see the blue smoke at the different timings.

1:41 and 2:25

4:40

Iíve looked into it on the mlr and other forums and lots of people suggest it is oil related / worn piston rings?

What Iíd like your advice on is whether it is a major thing as a garage told me that if they were to look at it, it would involve stripping the engine to examine the piston rings. My car is due to have a service this week and assumed the piston rings or anything else would be able to be looked at but apparently not.

A bit of background info on the car:
Recently had a 3Ē decat, downpipe and turbo elbow fitted, but hasnít been remapped since these parts were installed. Could this be a factor or not?

Hopefully attached are a few pics as well from the track day.

Thanks in advance for any help/advice

Ed
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Old 29-10-2019, 16:33   #2
Mita
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Not a great idea fitting then mods and thrashing round track in mapped. Could of broken your ringlands from over boosting.
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Old 29-10-2019, 16:37   #3
r3k1355
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Looks to smoke when you come off throttle and change down a gear?

Valve stem seals are also an option.
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Old 29-10-2019, 18:42   #4
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Mita, thanks for this - I did enquire if it would likely overboost but was told that as it boosts above the factory boost limit already, it suggests its been mapped in the past and that these mods probably wouldn't cause it to boost higher but just earlier.
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Old 29-10-2019, 18:43   #5
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Quote:
Originally Posted by r3k1355 View Post
Looks to smoke when you come off throttle and change down a gear?

Valve stem seals are also an option.
Yeah, it was after coming off throttle...how easy is it to check valve stem seals?
Thanks again
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Old 29-10-2019, 18:59   #6
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PCV valve stuck can give you cloudy puff of smoke when you get your foot off throttle.
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Evo 8 FQ300: 325 WHP and 375 LbFt torque at 1.6 bar
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Old 29-10-2019, 22:35   #7
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If itís on lift off Iíd put my money on rings


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Old 29-10-2019, 23:52   #8
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How would I go about checking them? Do you think it would be a costly job if I wasn't to do it myself?
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Old 30-10-2019, 00:30   #9
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How would I go about checking them? Do you think it would be a costly job if I wasn't to do it myself?


Compression test which any garage can do. If you do leakdown test youíll be able to tell if itís an issue with the head. Yes itís going to cost a few quid.


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Old 01-11-2019, 22:47   #10
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Compression check is a good start but if it's just the oil control ring thats gummed up you can get a good test result still and think it's something else.
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Old 02-11-2019, 08:54   #11
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A compression and leakdown test is clearly the first thing to have down. And checkout the condition of the plugs while you're at it.

But you will to be wary of how these results might can be interepreted.

Incidentally, have you noticed any oil usage?
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