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2.7 V6 thermostat housing replacement a DIY job?

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Lofty   
Mon Apr 17 2023, 02:04pm
Joined: Dec 29 2022
Member No: #5159
Location: Bristol
Hi all, I’ve got a slight leak from the thermostat housing on my 2006 2.7 V6. I’m mindful this will eventually fail completely and empty all the coolant. My question - How easy is it to replace, a DIY job?

I’ve replaced hoses and thermostats on other cars but if this is a nightmare I’ll leave it to the experts! Thanks
cit-rotti   
Mon Apr 17 2023, 05:11pm
Joined: Dec 03 2018
Member No: #3753
Location: Bayern
Easy is relative with the C6 2.7 HDI and I don't know your "screwdriver quality".
In my opinion, it is one of the simpler jobs - after the replacement, it must be filled and bled.
You can find the instructions for this here in the forum under
Technical documents
C6 Coolant Circuit Drain, Refill and Bleeding Guide and
C6 Coolant Outlet Housing Removal Guide

Instead of the original refill device, a 1 - 2 litre plastic bottle can also be used.

Greetings Wolfgang
cruiserphil   
Wed Apr 19 2023, 10:45am

Joined: Jan 24 2010
Member No: #38
Location: Celbridge
Hello Lofty,

As per cit-rotti's comments. It is relatively straightforward with a bit of patience. Removing the support bracket for the boost pipe from the intercooler to the butterfly box that sits over the housing is a bit fiddly. Removing the triangular bracket on the adjacent engine mounting makes it easier.

Don't delay in changing it though. If it bursts suddenly while driving you may not be aware of it. Owners have lost engines as a result of it. You should also look at Vaho's tutorial to refit the low coolant alarm system. I fitted it and it saved me when the inlet cooling tank failed.

Best regards,

Phil C.
 

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