Question about 1998 Toyota 4Runner

1 Answer

1998 4Runner smokes only when oil is low

Symptom: visible blue smoke came out of tail pipe; checked oil level (very low); added oil (added 1 qt 5W-30 along with Motor Honey); and no more smoke (at least for now) 02/28/2009. I changed the PCV valve on 03/01/2009 but it looks like the old one I replaced is still in pretty good shape.

Background: I brought this 1998 4Runner on 02/20/2009. It passed emission without any problem. No leaks on the ground. I changed the engine oil and added gas treatment. 185 miles later, the above symptom occurred. When the oil is at the proper level, no visible smoke comes out of the tailpipe. But when the oil is low, smoke comes out. Any idea what can be wrong? Any help would be highly appreciated.

One more piece of detail to add... I also find oil inside the air filter compartment. Can just a bad PVC valve cause this? Thanks.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.


    An expert that has over 500 points.

  • Expert
  • 239 Answers

You might need new valve guide seals. only a trained professional show attempt.

hope this helps.
please rate good.

Posted on Mar 02, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

3 Answers

Why is my 2007 Nissan sentra 2.0 using 1 qt of oil every 600 miles?

More than likely u have a leaking valve cover gasket unless your seeing smoke than it might have a burnt valve guide or guides if its smoking real bad than it could have bad rings and you don't want that cause then u half to tear the motor down basically rebuilding the motor

Nov 11, 2014 | 2007 Nissan Sentra 2.0 SL Sedan

2 Answers

My e39 blue smoke at starup

blue smoke at start up is a very common problem for BMW's starting about 10 years old. It is caused by the Oil Seperator Valve (OSV). The OSV catches all the oil that might push past the rings and recycles it to the oil pan. Replace the OSV and the symptom is solved.

Feb 27, 2014 | BMW Cars & Trucks

1 Answer


If you are adding oil to the engine I would say the rings or valve guides are worn out. Could also be a problem with the PCV valve.
Black smoke is usually too much fuel, blue smoke is usually burning oil.

Sep 10, 2012 | 1997 Toyota Corolla

1 Answer

Excessive black smokw on start up when cold (2)low oil presure when hot

Slight engine wear. Would advise using a heavier oil. The 5w 30 is great with low mileage. As an engine wears & the miles add up the internal parts get looser & a heavier oil should be used to help. Would start using 40 weight oil. Some smoking will continue but you should see a decrease in the morning start up & a rise in pressure during the day. There's also the STP & other motor oil honey/additives that can help these symptoms.

Jul 19, 2011 | 1993 Jeep Grand Cherokee

1 Answer

Burning 1 qt oil 2007 grand caravan sxt per 1000 miles. changed pcv vale still happenung

Is it really burning it, or just losing it? If you have blue smoke coming out your tail pipe, and oily black spark plugs, there's really not a whole lot you can do about it short of a rebuild of your engine. It really sounds like a rear main seal leak, or a faulty oil filter.

May 07, 2011 | 2007 Dodge Grand Caravan SXT Minivan

3 Answers

Why is my motor oil coming out my tail pipe?

Bad Piston,Bad rings,bad valve seals,Cracked cylinder head.cracked block. Don't forget now there is a lot of suction and compression going on in a motor. If any of the above are happening in an engine the suction will pass oil through a bad piston or rings or any of the above and cause Blue smoke and spit oil out the exaust along with blue smoke.

Jan 12, 2011 | 1989 Honda Accord 4 Door

1 Answer

Seems like my car has oil burning, need new Manifold. I would like to know why my car burning this much oil; is there a Manufature recall on these two items?

If there is blue smoke coming out the tail pipe it is burning oil. If there is not blue smoke then it's not burning it would be leaking. And have you checked the oil level? Are you adding oil? if it has smoke in the engine compartment then it could be a intake manifold seal but need more information to help you.

Sep 15, 2010 | 2003 Nissan Altima

3 Answers

Burning smell and smoke coming from hood

you may have an oil leak and the oil is burning off of the hot exhaust or engine youll have to open the hood in order to decipher where the oil is coming from. or if its even oil it could be transmission fluid coolant a number of things youll have to see if you can tell exactly what it is thats leaking but my best guess is its probably oil.if it is oil its more than likely coming from the valve cover. id check there first.

May 21, 2010 | 1997 Jeep Grand Cherokee

Not finding what you are looking for?
1998 Toyota 4Runner Logo

178 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides