My 05 XJ8L seems to gurgle (sounds like a coffee maker) from time to time in the cabin/dash area. Anyone heard this or??? everything works fine but this will make you wonder. Plus I spoke w/Arnott and they are working on a coilover for us!!!

 

not sure of your gurgling, but when you find more info on the shock replacement, definitely start a new thread to fill us all in, ok?

 

The gurgle is very likely air in the coolant system. The air makes its way into the cabin heater coil and when you accelerate the extra pump pressure pushes the air around making the sound. The system should be bled properly to expell the air.

The sound will then go away. It it not good to have these air pockets in the cooling system as they create high turbulence when passing through flaps, doors, impellers, and sensors.

 

What is the proper procedure to bleed the coolant system?? I just replaced the therm. hsg. and most likely need to do this!!!

 

Make sure the coolant is at the correct level first. Take the car for a drive to bring the engine up to operating temp, have the climate control temps set to HIGH heat (this opens up the cabin heater cores for circulation).

Leave the engine running, use a large flatblade screwdriver and S L O W L Y crack open the large plastic bleed screw just after the overfill hose on the header tank. You should begin hearing a sizzling sound, when you do, stop opening the bleed screw. Leave it in this opened position until you see liquid coolant coming out, then tighten the screw - BE CAREFUL!! not to over tighten or you can strip the screw. It only needs to be tightened until the sizzling or coolant stops. Stop the engine, give it about 5/10 minutes, crack open the bleed screw again, se if anymore air is expelled.

Based on how much air you have in the heater cores, you might need to do this a couple of times. Eventually, if not on the first time, you'll expell all the air.

BTW - this is not exactly "book procedure" but a modification because is sounds like you have air all the way into the cabin heater cores which wouldn't happen under a normal drain/flush or other simple coolant work.

 

I have had a re-occuring leak overtime because of therm. hsg. fault!! Have added coolant several times so the idea of air thru-out is valid!! Have since replaced therm hsg. (bad design but found a shortcut) and will bleed system as recomended and post results.

Air & water cause wierd symtoms!

Thanks