Question about 1999 Chevrolet Tahoe

3 Answers

My engine oil looks like chocolate milke shake what could be the cause? i checked my spark plugs and the middle two on the passenger side were covered in oil mostly the bottom of the plugs. i drained my oil so i can replace the head gasket but i dont know if the head gasket is the cause of the oil looking like a chocolate milkshake

Posted by on

3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 62 Answers

In some cases I have seen blown intake manifold gaskets cause a milkshake in the crankcase inspect the lower intake gaskets coolant passages at the end of the cylinder heads for damage. I would suggest a compression test and a cylinder leak down test befor further tear down.

Posted on Jul 02, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,185 Answers

If the head gasket is gone then you will discharge water into the engine bores that goes into the sump and mixes with the oil

It is stirred up by the crankshaft and you get a brown mayonisse.

The only problem you may face is if it is a crack in the engine block letting water transfer down that way , then it is a new block

Posted on Jun 30, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Chevrolet Master
  • 4,369 Answers

It is a blown head gasket or a cracked head. coolant is getting into the oil.
Or, unlikely, but it could be a bad pcv valve that is not venting moisture from the engine.

Posted on Jun 30, 2009

1 Suggested Answer

  • 2 Answers

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

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer


why ask this? if they are bad , the leak antifreeze, out side engine
or inside. both are obvious. green on ground, or engine oil
looks HORRID, like milk chocolate shake,
answer, there are core plugs (aka, freeze misnomer) are all over the engine, google freeze plug, under image. bingo.
on side of engine, (no engine option stated) on front and rear, in the heads, some have them on top of heads , inside the engine.

my guess someone said, check the freeze plugs. right?
to what question?

Jan 26, 2014 | 2004 Jeep Liberty

1 Answer

Engine smoking, clicking sound, and over heating shaking

You may have blown a head gasket. smoking is fluids (oil and antifreeze) getting into the cylinder and burning.
SHAKING- When the antifreeze and oil enter the cylinder they don't burn well, causing the plug to foul.
Check your radiator and see if the antifreeze looks like chocolate milk, or check your oil dip stick for the same.
pull your spark plugs and inspect the ends for oil and or antifreeze

Nov 11, 2013 | 1999 Jeep Grand Cherokee

1 Answer

98 civic ex ,how do I jnow if head is blown ,,dies nit turn iver

First check your dipstick see if the oil looks like chocolate milk. Secondly check your radiator fluid make sure the engine is cool. See if you have oil droplets in the radiator the oil will float on top. You can also pull out one spark plug at a time to see if there's any moisture on the plugs. And finally I can't even make out what the last thing you're saying. Good luck

Aug 26, 2013 | 1994 Buick Park Avenue

1 Answer

Volvo has been overheating put coolant in but it drains somewhere no leaks are visible now car wont start

This is NOT a good thing...Better check you engine oil. When engine coolant disappears without any signs of it leaking on the ground, it is usually because it is leaking into the crankcase via a blown head gasket, blown intake manifold gasket, or cracked cylinder head. If your engine oil looks milky, like a chocolate milk shake, it is time for major engine repair or replacement.

May 20, 2012 | 2004 Volvo S40

1 Answer

Blowing white smoke

white smoke is caused by-- water or anti-freeze entering cylinder . if in radiator or the overflow tank. it will look like a chocolate milk shake. check on oil dipstick for traces of water or anti-freeze. also, a bad head gasket will let water or anti-freeze in combustion area. head gasket symtoms if bad. Symptom #1: Chronic Engine Overheating
Symptom #2: Significant Drop in Coolant Level Symptom #3: Mixing of Coolant and Engine Oil
Symptom #4: White Smoke from Exhaust Pipe

popping of overflow cap Symptom #6: Air Bubbles in Radiator
Symptom #7: Engine Lacks Power GOOD-DAY!

Apr 17, 2012 | Cars & Trucks

1 Answer

Big fuel consumption and the lose the antifreez the coolant in engine

if the coolant is mixed with your oil you have a blown head gasket ,or a bad intake gasket check your oil if is creamy like a chocolate milk shake then is a head gasket

Apr 19, 2011 | 2000 Daewoo Lanos

2 Answers

06 Dodge 1500 V8 4.7L: Overheating, Engine Light

Check for plugged exhaust system. If plugged will cause overheating and misfiring of all cylinders.

Apr 09, 2009 | 2006 Dodge Ram 1500

1 Answer

My vw t4 2.5tdi year 2000 van is a knightmare to start

look at the spark plugs an see if they look like the have chocolate milk on them. You may have a head gasket going out. White smoke is usually burning coolant. Also you can look at the uderside of the oil cap. a little chocolate milk look is ok, that's pretty normal for a cold climate a lot is not a good sign.

Mar 14, 2009 | 2001 Volkswagen Eurovan

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

1,816 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

75824 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8215 Answers

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

Answer questions

Manuals & User Guides