Thanks Dan ... I was also thinking along the same lines, leakage into the engine
combustion chambers ... but I always thought that would lead to visible "smoke"
exhaust ... we're not seeing any of that either.
Having said that, do you still think most likely it's leaking inside the engine?
it must be if there's no other (outward) sign of loss, huh?
Thanks ... Phil
Could be an internal leak from worn Intake manifold gaskets. or it could
be an external leak. Even en external leak cold be burned off on the hot
engine and you wouldn't notice it.
If you have a coolant level sensor it could have an air bubble traped
around the sensor. Try tapping around its location. Sometimes just the
coolant splashing around the bottle is enough to trip the light. Kind of
a common problem.
1991 Pontiac Bonneville LE
Checked the oil and nothing obvious there. Can't see anything externally, and
even if it
burned right off, I'd think I would smell the coolant, which I don't.
Took another look at the overflow tank and it's well within the hot / cold lines
don't think the level is actually low. Leading me to suspect a faulty sensor
... but ...
do you have any idea where the sensor actually is located?
Thanks yet again ... Phil
firstname.lastname@example.org (Harry Face) wrote:
I missed the original message but had the same problem. Losing
coolant slowly and didn't know where it went. This on a Buick Lesabre
'93, 3.8 engine.
We changed the waterpump which definitely was showing leakage at the
bearing hole, but still lost coolant. Then when the alternator went
bad, we spotted a damp spot behind it and discovered the fitting for
the very small coolant hose behind the alternator was cracked and
leaking where it couldn't be seen.
The fitting broke when we tried to remove the hose and the threaded
plastic part stayed in the hole.
We didn't have an 'easy out' big enough, but purchased a "Heater hose
coupler remover" #62200 by Lisle
Unfortunately that didn't work either since there was lots of
corrosion in the thread area and it just slipped and made the hole
bigger. Anyway it sorta proves that this is a common problem in GM
Mysterious loss of coolant in GM cars can be directly attributed to
lousy engineering. The replacement fitting (metal) costs $13.00 for a
problem that GM caused by putting a cheap plastic fitting into an
What we finally did was get an old wood spade drill bit that measured
3/4" and heated it red hot. then inserted it in the hole where it
melted a slot, top and bottom in the broken plastic piece right down
to the top of the threads. With the piece cut in two, we were able to
fish and hook it out without dropping it into the engine.
On Thu, 26 Jun 2003 00:44:30 GMT, email@example.com (Phil) wrote:
I bet it will soon have the leaking intake manifold gasket. I replaced the
water pump on a 1999 Olds (seeping through the lower weephole) and about a
month later, he thought I did the water pump job wrong because it was still
"missing" coolant. Turns out it was going into the crankcase. Pay
attention to the coolant and it may save you a costly engine replacement in
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.