Dacia Duster coolant leak

[jamesson]

The initial message was deleted from this topic on 14 November 2025 at 09:14

[paul_c123]

Worth testing for head gasket failure, its a simple test after all. Did the mechanic just give an opinion without actually looking at the car??

https://www.ebay.co.uk/itm/405402775430

I'm sure there are lots of other/better kits out there. In a pro garage you'd just wave the gas sniffer over the coolant bottle.

Edited by paul_c123 on Thursday 2nd October 17:04

[paul_c123]

May I ask, politely, what kind of answer would you like from the Pistonheads Forum?

You have taken the car to a mechanic, who has eyes on the car, and has the opportunity to do diagnostic tests etc and gain a much clearer overall picture of what's going on, where do answers from the internet fit in with this?

[E-bmw]

jamesson said:

He did that, which was what led to the coolant bubbling.

My understanding is that it's not a foolproof test - but it certainly indicates a problem somewhere!

The test is actually pretty foolproof, if there are combustion gases getting into the coolant then you have either a blown head gasket, cracked block or cracked cylinder head.