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boy ho

New Member

• Jan 12, 2007

• #1

This doesn't happen constantly, but sometimes when driving along, usually under acceleration, there is a "gurgling" noise that seems to come from behind the centre of the dashboard of our '95 3.9 V8.

The heater is working fine, but, my only thought as to what it can be is air in the coolant pipes??? If it is this, is there any way of easily bleeding the air out?? Or any other idea of what it could be???

Many Thanks

 

S

slob

Well-Known Member

• Jan 12, 2007

• #2

it may be low pressure in yer A/C if its fitted

 

B

boy ho

New Member

• Jan 12, 2007

• #3

Nope - no air con fitted

 

ormus

New Member

• Jan 12, 2007

• #4

air lock in the heater matrix then.

 

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boy ho

New Member

• Jan 18, 2007

• #5

That's what I thought it was. My next question is how to bleed the air out? Are there any bleed points anywhere?

 

ormus

New Member

• Jan 18, 2007

• #6

make sure the heater is on the hot setting, then let the engine tick over till very hot, with no rad cap on.
(say 10 minutes or so)
then replace the cap. any airlock should be then gone.

 

B

boy ho

New Member

• Jan 19, 2007

• #7

Many Thanks . . .

will give that a go over the weekend

 

Northern Irelander

Well-Known Member

• Jan 19, 2007

• #8

I would bleed ASAP. Air locks in other petrol engines can indicate loss of coolant, leak, faulty cap even due to head gasket failure.

If bled properly and air lock comes back then time to look at pressure checks etc

 

B

boy ho

New Member

• Jan 20, 2007

• #9

Makes sense as just had to replace expansion tank cap as that was faulty - suspect that has what has caused air lock