Coolant overflow dropping about 1/4" every three weeks. This started about the beginning of last December. Can detect no coolant smell in engine compartment. No external leaks that I can detect. Any of you who own 2000+ SSEi'* know of an intake gasket or other sealing problem with these guys?

Make sure to look everywhere!!

If you have a bad lower injtake manifold, this could gum your lifters at long term use.

You see no slight seepage anywhere on the outside of the motor? Look on the trans under the throttle body. It'* a tough one to see usually.

I had the same problem a little less than a month ago. Coolant overflow was disappearing in about a week. No visible leaks or coolant smell. Went to the dealer and found out it was the upper and lower intake gaskets. It'* been running perfectly now with no noticeable damage to the motor that I can tell. Although that statement may come back to bite me!

oh me! oh me! oh me!
Coolant ever so slightly was dropping... 1/2 inch in 20k miles... then, just before NEBF....boom - bottom of the tank. Topped her off....no droppage since. Of course, I haven't checked her in a week. Will do so at lunchtime....

Mine was kinda like that, but I doubt mine will be around much longer.

When my LIM went I only ocasionally smelled it and could never see it until I cleaned my engine. Mine was leaking out of the bolt next to the #3 fuel injector and pooling up in the manifold. (I had previously dismissed the residue as a result of sloppy oil changes) What totally gave it away was the dark red color the residue turned after the engine was cleaned.

This was the easiest pic I could get of the holes on the mani but I would look extra carefull in all of the ports all the way around the mani.
http://i3.tinypic.com/wbozte.jpg

If you are comfortable with pulling the MAF screen and maybe the MAF sensor you can look in the trottlbody with a flashlight.I'd say since you cant ever smell it this is the one to check VERY closely
http://i3.tinypic.com/wbqkxj.jpg

Hint: an inspection mirror would greatly help for inspecting the back side of the mani and the bottom of the throttle body.

good luck

Thanks for the reply guys. I appreciate you all taking the time to help me. I see there are a few of you with the SLE'* and gasket problem. Do they use the same gaskets on the supercharged? I haven't really heard of any problems with SSEi manifold gasket leaks but anything is possible.

I'll pull the maf screen this weekend and check inside. I've been wanting to clean the throttle plate anyway.

To answer someone else, NOPE. No external leaks whatsoever.

I was losing some a while back and I couldn't find anything to indicate a leak, either. Quite by accident, I found that the foam under the radiator was soaked with antifreeze. I replaced my radiator cap, and it'* been fine since.

Mine was leaking, very slightly, so let the car like that a while, thinking it was nothing, then i heard the valve clicking.... and needed my lifters cleaned.

Dunno if its coincidence, but couples month later my engine break, spun bearing, and needed a new engine...............................but.......... ............




Snot a problem anymore......



:(


edit: Ended my bonneville ownage with a 800th post....

Goodluck