J rod 2007-06-07 23:40:22
My girlfriend’s ’01 Malibu’s dummy light is going off for low engine
coolant. She’s at about 85,000 miles. Leaking around the intake
manifold appears to be a common occurance from what I have read in this
group. How does one determine if there is leakage around the intake
manifold? Will there be visible coolant leakage?
Thanks for any info.
Repairman 2007-06-07 23:40:34
Yes and No
The manifold gaskets leak into the engine oil causing oil dilution and
damage to the motor bearings.
They can leak to the outside also and it will be visible.
Oil analysis is the sure way to determine internal leakage,externally a dye
in the antifreeze makes it a easy job to check as it’s usually a small leak.
My experience with a ’01 &’02 Malibu in the family fleet is that it’s time
for gaskets. I’ve done both cars, one at 75k and the other at 95k. Both cars
are still running great as I got on repairing them quickly.
Blackstone Labs does a fine job of oil analysis, Google them.
J rod 2007-06-07 23:40:39
Thanks for the info.
To my understanding, the coolant/antifreeze system in a car is a closed
system – meaning that if that dummy light for low coolant turns on it
is a sign of a pretty significant problem, correct? Meaning there has
to be a leak somewhere, be it a gasket, or hose, etc.
Repairman 2007-06-07 23:40:46
Is the coolant tank empty? Then you know you have a leak.
Get it to qualified mechanic because coolant loss is a serious issue.
J rod 2007-06-07 23:40:50
Nah. There’s coolant in there. Even a little in the overflow tank
last I checked. The dummy light will turn on for a few seconds, then
I’m figuring this repair might be a little over my head and we’ll be
taking it to the shop to get it checked out.
Thanks for the info.
Kjunraven 2007-06-07 23:40:55
in your car it is not a overflow tank. its a surge tank with a very picky
sensor in it. of course the sensor controls your low coolant lamp….IF
your surge tank is up to proper level and warning lamp is ON, replace
sensor. IF your coolant level is actually low consult qualified ..blah,