My daughter has a 2005 645 Ci. There is a coolant leak on the passenger side of the car. I can see it on the plate on the bottom of the motor but I can't see where it's coming from. Any ideas? Thanks.
Hi,
Check the lower radiator hose, it has a temperature sensor with an O-ring that can shrink over time and allow coolant to escape.
I decided to just buy another sensor as opposed to the seal alone, as it wasn't too expensive.
Sensor housing will have wet greenish coolant residue around it.
20min fix.
I had 2 leaks, this one was an easy fix, the other was the coolant transfer chest which involved stripping the engine, so went to an indy garage to fix that issue.
As far as back oof the engine your have the valley pan, the coolant plate that is on the block under neath the flywheel. Plastic expansion tank is on the passenger side and they crack all the time
Last edited by jclausen; 01-22-2017 at 12:21 PM.
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