Question about Nissan Frontier

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Replacing valve seals

My frontier has 38,000 miles and it has blue smoke coming from the exhaust pipe, a lot of smoke after I stop and accelerate again

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  1. So my first question is why do you have " replacing valve seals " as your question? Did some tell you that was what was wrong? 38K miles is nothing, the car should just now be broken in. The first thing I would suggest since I am not thee and I do not know all the details I am going to assume you may have just had the car serviced recently. I would let the auto sit on a level surface overnight then in the morning DO NOT start the engine but check the engine oil level and see if it has been over filled. If so do not start the car but get a drain pan and drain out the excess oil. I would also hope that it is still under warranty so you wouldn't have to spend the money or time. The other more common Blue smoke problems would be if the vehicle was ran very low on oil and the cylinders and rings were scored in which case that would be a rebuild job. Don't get me wrong it is possible for the valve seals to be leaking letting oil run into the engine but again unless there is a service letter or a recall unlikely at these miles. It is also possible that someone ran the engine with too heavy or too light weight of oil . Under speculation you could even have had a prankster pour some oil or transmission fluid in your gas tank. Maybe I hit one of the possibilities and maybe not. If you do have to replace the valve seals you have quite a bit of work ahead of you and it sucks that it happened with so few miles on the engine. I am at 288K miles on my truck and just now getting a little smoke and that is only because my wife had been driving it for several months and ran it out of oil to the point that the engine started to seize and she barely made it home. Needless to say when I found out what had happened and she had been driving it with the gauge flashing and warning her no oil pressure. I just waited till the next day and took my sons truck to the parts store and picked up my favorite brand of synthetic oil filled the engine with 5 quarts and started it up. Drove it around some mumbling under my breath because I was shooting for 500K but she nixed that. 8 months later engine still running smooth just using some oil on start up and a little while driving but it could have been a lot worse. Good Luck and let me know the out come.

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

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SOURCE: 1993 TOYOTA TERCEL 1500cc Valve Seals Replaced now smokes much worse

You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.

Posted on Sep 27, 2008

  • 1779 Answers

SOURCE: white smoke coming from exhaust when accelerating

This is usually an indication of a bad head gasket.I gasket. The white smoke is the coolant leaking out of the engine and winding up in the oil passages, due to a bad head gasket. To confirm this,
1. check oil. Is level increased, or milky appearance?
2. Is coolant level dropping, but u don't see any signs of leaks?
The above indicates a bad head gasket, causing the white smoke u describe. Let me know how u make out.

Posted on Jan 03, 2009

Richie_asg1
  • 1036 Answers

SOURCE: thick white smoke coming from exhaust

I would think this will be a blown turbo.

These are fed by a small oil pipe and if the unit overheats (due to wear) - this oil fill feed directly into either the inlet manifold - or the outlet - exhaust.
If it is spilling oil into the hot exhaust - you will get a thick white fog. You can confirm this by placing a clear glass bottle or jar in the exhaust stream - and see if it gets a thick coating of oil on it. If it evaporates - it's water, if not - or feels oily - new turbo or overhaul.

Best get is sortd sooner rather than later - as you may be able to save most of it for an overhaul rather than scrap it if badly worn.

Posted on Feb 04, 2009

SOURCE: white smoke out the exhaust

hi white smoke is from coolant in the cylnders bed head gasket.blueish white smoke is oil in the cylnders either bad valve seals or bad piston rings.must rebuild engine or heads.

Posted on Feb 14, 2009

jagjeffery
  • 318 Answers

SOURCE: Exhaust smoke - 1994 XJ6 4.0

you have bad valve seals again and it is possible that the valve guides are bad ( to much play ) i worked for Jaguar 13 years and i have done 100's of these and very few needed guides it sound like the seals where not done correctly at the last repair.

Posted on May 29, 2009

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