ive a 2011 doblo 1.3 multijet it has blown two radiators and seams to be over pressurising the cooling system when I leave cap off expansion tank the are some bubbles . no oil in water or water in oil . the engine sounds ok and has not lost power is this a head gasket thanks Andy
Technical pressure in cooling system
- Thread starter ajtandy
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Technical pressure in cooling system
Hi Andy
My suspicion would 1st fall on the filler cap.. it is supposed to be the 'weak link'
If you are getting overpressure then that should let coolant out 'safely'
Are you sure the waterpump is operating correctly ?
My suspicion would 1st fall on the filler cap.. it is supposed to be the 'weak link'
If you are getting overpressure then that should let coolant out 'safely'
Are you sure the waterpump is operating correctly ?
Hi Andy, this happened to me, except the pipes went instead of the radiator. first one from the thermostat then a couple of days later the top pipe, half way down the A9 (exciting to say the least) my reservoir cap sounded like it wanted to pop when the RAC man arrived and filled the system again. I had vapor or fumes and bubbles in the reservoir the RAC guy recond it was 99% sure to be the cylinder head gasket.
Mjsroofing
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Egr coolers can give the same symptoms
Should still blow by the cap though
Blowing hoses just sounds wrong..
Most times they are weak from spilt oil contamination
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your head gasket has gone, so pistons are pressurising cooling system through the gap. a sniff test will confirm this.
you wont get oil water mix when gasket goes between water way and cylinder
you wont get oil water mix when gasket goes between water way and cylinder
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Mjsroofing
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Always worth checking egr cooler before you strip the head down as they will give exactly the same symptoms
With all this 'fizzing' ..
Did the hose ( hoses..) blow.. ?
From the way this reads it didnt
If you bypass the coolers coolant tails.. you will soon know
no need to strip a head to do a sniff test
Mjsroofing
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Sniff test cant tell you where the exhuast fumes are coming from. It only tells you that there is fumes there.
