Member Since: 12 Aug 2018
Location: Henley in arden
Posts: 515
Coolant bleed screw
Hi, anyone had the the bleed screw on the expansion tank come loose? Ours was showing low coolant the other day so I had a look under the bonnet gave it slight tweak and it blew off, the engine was hot by the way. It wouldn’t thread back in properly, I wound some ptfe tape round and all was good, until today when it blew off just as my wife pulled onto the drive. Is this a common fault?
25th Mar 2019 8:34 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4669
Not come across it as an issue before, might be someone previously damaged the threads yµ (idµ - eAµ) ψ=mψ
25th Mar 2019 9:05 pm
Lee Trinder
Member Since: 12 Aug 2018
Location: Henley in arden
Posts: 515
Hi, seems to be a very short thread on bleed screw.
25th Mar 2019 9:11 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10373
New tanks are £25
25th Mar 2019 9:26 pm
Lee Trinder
Member Since: 12 Aug 2018
Location: Henley in arden
Posts: 515
One on order, cheers
25th Mar 2019 9:57 pm
cobby
Member Since: 05 Aug 2018
Location: Oxfordshire
Posts: 226
I run mine with the radiator cap loose and it causes no issues as I do with my other vehicles.
I think 15psi in the cooling system puts too much stress on seals hoses etc.
I know it's designed for it and the idea behind pressurising the system is to raise the boiling point and allow the use of smaller radiators.
As I said I've run my D3 like it for 8 years not even having to top it up.
Jim.
26th Mar 2019 10:34 am
L319
Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2080
I had my bleed screw leaking and as the ambient air temp. was 39C, I decided not to tighten as I was concerned as its plastic it would strip or shear off. Very early ones didn't have a seal so it was changed to the later version with one.
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