Hi `Mike & Welcome to our Monte Carlo Family
It's great to read that you are helping your friend.
Your profile infor states that you have knowledge on working on cars, and I am sure that you have done
the basic checks. Below is one problem that some
Monte Owner's have had.
Check back on your thread question & I'm sure our
expert tech member's will post their suggestions/comment's on your friends problems.
Oh Post some pictures of your Street Toy's,
we love cars on the MCF : )
Have you taken it 2 the track ? Times ?
Hope one of our member's can assist with your problem.
Good Luck


Check upper intake gaskets for leaks
http://kona.kontera.com/javascript/l...rey_loader.gif
Milky Colored Oil (Replace Intermediate Intake Gasket) - (May 21, 2003)


http://www.justanswer.com/img/spacer.gifhttp://gsi.xw.gm.com/image_en_us/gif.../999999995.gifhttp://www.justanswer.com/img/spacer.gifhttp://www.justanswer.com/img/spacer.gifView Full Imagehttp://www.justanswer.com/img/spacer.gifSubject:Loss of Coolant, Milky Colored Oil (Replace Intermediate Intake Gasket)


Models:2000-2003 , Park Avenue, Regal2000-2003 Chevrolet Impala, Monte Carlo2000-2003 Pontiac Bonneville2000-2003 Pontiac Grand Prixwith 3.8L V6 (VIN K - RPO L36)


Built Prior to the Following VIN Breakpoints:
Plant
Plant Code
Models
VIN
Fairfax
F
Grand Prix
All Vehicles
Hamtramck
U
Le Sabre
3U251577
Orion
4
Bonneville
Le Sabre
Park Avenue
34180673
Oshawa
Plant 1
9
Impala
Monte Carlo
39361907
Oshawa
Plant 2
1
Regal
31275860

Condition

Some owners may comment on a loss of coolant, coolant odor, having to add coolant or a milky substance on either the oil dipstick or oil fill cap. Additionally, owners may indicate that there are signs of coolant loss left on the ground where the vehicle is normally parked.

Cause


Condition may be due to coolant leaking past intermediate intake or gaskets.

Correction


Important: The upper [color] should not be replaced for a coolant leak condition, unless a rare instance of physical damage is found. Even if the throttle body surface shows a slight warpage, the upper intake should not be replaced unless a drivability concern is noted or a relevant engine DTC, such as a code for an unmetered air leak, is set and the upper intake manifold can clearly be shown as the cause of the concern.
Thoroughly check for any external leaks. If no external leaks are found, then replace the intermediate intake manifold gasket and the throttle body gasket. When changing the throttle body gasket, the nuts that retain the throttle body should be replaced with a new design that improves torque retention. Medium strength thread locker should be applied to the studs before installing the new nuts.