Cars blowing white-ish blue smoke-Help Me Please - Page 2 - MustangForums.com



4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

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Old 04-30-2012, 11:31 AM   #11
JeremyB
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Quote:
Originally Posted by uberstang1 View Post
First change the PCV valve and make sure its not just oil blowby, after that if it continues it could be worn out rings or bad valve seals which would be time to rebuild.
I did not think about that, could very well be it
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Old 04-30-2012, 12:04 PM   #12
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+1 with Uber.
You might want to change the PCV valve and possibly add a "catch can" between the PVC valve & intake fitting. At WOT you may be sucking oil thru/past the PVC valve.
This is an inexpensive thing to try.

Depending on where the intake end of the hose is plugged in could explain why the smoke is only on one bank.
Start with the easy stuff before assuming it is in need of major engine work, you just might get lucky.

Valve seals/guides are "usually" both banks equally, as well as heavy blow-by.
Head gasket issues are one bank.
Broken rings are one bank.

Doing a compression test will tell you a lot, and maybe eliminate a lot of possible issues.

Last edited by Old Mustanger; 04-30-2012 at 01:23 PM.
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Old 05-01-2012, 02:34 PM   #13
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to rule out worn rings do a compression check....real easy. just make sure your weakest cylinder is within 25% of you highest pressure reading. if it is then your doing good there. i mean 130k isn't that high mileage, but its when things start to get alil loosey goosy
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Old 05-02-2012, 10:27 AM   #14
matt1990
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Thank you very much everyone, I took you guys advise and changed the PVC valve yesterday and will check for smoke in an hour or two and if it's not that then I'm going 5.4 anybody know if the stock auto tranny is a direct bolt on
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Old 05-02-2012, 08:31 PM   #15
UPRSharad
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As others have said, if it's just a little blow by, a catch can would remedy that. Our billet catch can is only $89 with a Lifetime Guarantee if you use the mf.com discount, and it's very effective at catching the oil vapor. http://www.uprproducts.com/mustang-b...erator-79.html My '06 GT was occasionally puffing smoke at startup, but that went away after I installed a UPR catch can on it.

Regarding the 4.6/5.4 swap, I believe the tranny bolts on the same, but I'm not positive.
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Old 05-02-2012, 09:33 PM   #16
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Quote:
Originally Posted by matt1990 View Post
i hope not, ugh i was gunna sell this thing in 2 months and try and get a 4v too
Looks like it's time to go 4v anyhow, haha. But seriously, good luck :/
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Old 05-17-2012, 01:38 AM   #17
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I am having a similar issue with my 06 GT so please keep posting updates. Light blue smoke at high RPMs WOT. Have also heard ticking sound at the same time, not always though?
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Old 05-17-2012, 02:43 AM   #18
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if it only happens under load its prob gonna be rings bro. You losing any noticeable oil?
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Old 05-17-2012, 08:35 AM   #19
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No, but my oil smells like fuel.
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Old 05-17-2012, 08:38 AM   #20
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Originally Posted by Akita87 View Post
No, but my oil smells like fuel.
You have a leaking injector. Change out the bad one soon, running fuel/oil in crankcase motor wont get lubrication properly and boom new motor time.
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