Question about 1999 Chevrolet Tahoe

6 Answers

Oil looks milky,and losing coolant,is there something else it could be besides a blown head gasket or intake.99chevy tahoe 5.7

Posted by on

Ad

6 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 6,784 Answers

HI. If your car is equipped with an engine oil cooler that uses coolant to operate, this would be a good place to start (This is a big issue in some GM vehicles). Sometimes an engine oil cooler can act like a one way valve. When the engine is not running but is still hot the cooling system will have about 15 pounds of residual pressure forcing coolant into the engine. This problem can be repaired by replacing the engine oil cooler. Once the oil cooler has been replaced you must replace the engine oil and filter and recheck for the conditions once more. There are three remaining causes for coolant in the motor oil, and they all require you to dismantle the engine. This can be tricky because the repair overlaps and it is difficult to tell which one is causing the problem. For example: A mechanic has told you that the cylinder head is cracked, or warped, and as they start disassembling, they have discover it was the intake manifold gasket that has failed. It's up to the honesty of the repair shop to tell the customer that the cost of the repair will be less. Or the opposite can happen, example: A repair shop has told your engine has a blown head gasket, once the disassembling is complete, they inform you the head gasket is ok, and the cylinder has been pressure checked and is ok. This only leaves the engine block as the failure and must be replaced to repair the problem, and that can be very costly. Always check the intake gasket first on V6, V8 and V10 engines. Then the cylinder head gaskets, cylinder heads and finally the engine block.

Posted on Dec 10, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers

Not head gasket. manifold gasket.. something breached the cooling jacket. could be the timing chain ripped right through allowing your coolant to mingle with your oil...explains loss of coolant.. and how it looks like chocolate milk..yeah this was real fun..save yourself the trouble. take the top of the motor off and look..its right there.. just takes alot of work to see it..you will most likely find metal shavings all over if its what i think.. for your block to crack..you would have to have only water in the thing and have it in zub zero temps where it will freeze, expanding and busting the block. even then , i doubt it.. start questioning the timing chain and assembly. at least it will lead you in the direction where the prob exists..if its not that ...you will find out exactly what it is once you get your eyes in there.

Posted on Dec 11, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 986 Answers

If you remove your intake first you might be able to tell And it can be very well be your intake its that time of year

Posted on Dec 10, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Chevrolet Master
  • 599 Answers

Sorry these are all signs of a blown head gasket, did the truck overheat. to be sure have someone do a block test. this will confirm that the gasket is blown. sorry hope this helps if you need more help get back to me as i strive to be the best. Please rate my fix?

Posted on Dec 10, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 3,092 Answers

If it got hot on you , blown head gasket, if not check intake.

Posted on Dec 10, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,055 Answers

A cracked block!!!!!!!!

Posted on Dec 10, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Oil became milky in rover 200


Milky oil is a sign of blown head gasket.
Start with a oil change.
Monitor the coolant level.

Lose of coolant will confirm head gasket leak.

Jan 12, 2014 | GMC Cars & Trucks

2 Answers

Water leaks out completely not from any hoses back toward tranny


Could be a blown head gasket. Check your oil dipstick. Is the oil consistent or does it have water in it? I would check that first. I believe it would also be blowing some white smoke as well.

Oct 03, 2013 | 1994 Chevrolet Astro

1 Answer

Milky oil dipstick, white exhaust smoke, coolant in spark plugs


*White milky oil on dipstick = coolant in oil.
*Coolant on sparkplugs = cracked head or blown head gasket
*White smoke = burning excessive oil in the cylinders, which can be caused by a number of things including valve seals, cracked head or blown head gasket.
***All three of these symptoms together, however, means its the head or head gasket. Both are costly but better the head gasket than the entire head.

Jan 18, 2012 | 2002 Buick LeSabre

2 Answers

2000 durango milky substance in oil cap


milky in the oil cap is ok -- this is caused by condensation and oil mixing inside the oil cap and it is nothing to be worried about.
now if you look at the dip stick and you see a milky looking oil on it -- and if you do a oil change and notice it to be milky - then this is a sign that you may have a blown head gasket, and this you need to worry about.


c...

Feb 05, 2011 | 2000 Dodge Durango

2 Answers

White smoke coming out of tail pipe, iddles.


usually a sign of a blown head gasket or intake gasket or, gulp a cracked head or block. Check your engine oil for a milky color, This would confirm a blown head gasket. There is a test to determine if hydrocarbons are in your coolant. If your coolant level is low or empty, this is another sign.

Sep 15, 2010 | 2005 Chevrolet Equinox

1 Answer

1994 Ford Mustang blowing white smoke that smells like pure gas. Gas running straight through and getting about 5 mile per gallon.


Sounds like a blown head or intake gasket. Coolant in the oil is a sure sign. Another sure sign is loss of coolant with no obvious leaks.

Coolant in the cylinders will emit white smoke, and the fuel smell is probably raw fuel passing through because it can't ignite due to the coolant.

Pull the dipstick and if the oil looks milky, then it is a blown gasket, or worst case scenario, a cracked head or block.

Jun 04, 2010 | Ford Mustang Cars & Trucks

2 Answers

Head gasket


depends where its blown if your oil is milky looking and thick or it blows out all of your coolant if you have rad cap of ff you will see bubbles in rad either will indicate a bad gasket

Apr 20, 2010 | 1992 Cadillac DeVille

2 Answers

Suddenly started smoking white smoke and seems to be losing power


White smoke is coolant being burnt. That with your lose of power would suggest a bad head gasket. A compression test could confirm it. Hope this helps.

Nov 25, 2009 | 1995 Plymouth Voyager

Not finding what you are looking for?
1999 Chevrolet Tahoe Logo

1,136 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

83810 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8841 Answers

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

Answer questions

Manuals & User Guides

Loading...