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Rootes75
Joined: 30 Apr 2013 Posts: 3805 Location: The Somerset Levels
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Posted: Tue Feb 26, 2019 2:22 pm Post subject: Thermostats |
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After taking my Commer lorry out for a run up of the engine she boiled up. I want to replace the thermostat but this far I am having trouble.
The Commer 5/7 ton Parts list give the thermostat as 'BGA.5551', I have phoned around my usual helpful contacts and they haven't heard of the number!?!
Does anyone on the forum know of someone to recommend for help finding one? _________________ Various Rootes Vehicles. |
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MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
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Posted: Tue Feb 26, 2019 3:14 pm Post subject: |
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I think that's what I'd call a 'universal' 'stat. It should be readily available in 175 185 or 195 degree versions.
Does it look like this? https://www.amazon.co.uk/BGA-CT5551-Thermostat/dp/B00AN5WUH8 _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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Rootes75
Joined: 30 Apr 2013 Posts: 3805 Location: The Somerset Levels
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Posted: Tue Feb 26, 2019 3:39 pm Post subject: |
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No it doesn't look like that, look at he picture below its item 197.
_________________ Various Rootes Vehicles. |
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MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
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Posted: Tue Feb 26, 2019 4:17 pm Post subject: |
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Oh!
That's the bellows style - boat engines often used them.
I suspect the later wax-stat style will fit.
(W-S-M at Easter, do you think?) _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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roverdriver
Joined: 18 Oct 2008 Posts: 1210 Location: 100 miles from Melbourne, Victoria, Australia
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Posted: Wed Feb 27, 2019 7:15 am Post subject: |
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I agree that a standard bellows one will probably fit, however a word of caution- while the older units could fail, they would fail 'open' but I do believe that some modern ones can fail 'closed' and that could be disastrous to ones engine. _________________ Dane- roverdriver but not a Viking. |
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lowdrag
Joined: 10 Apr 2009 Posts: 1585 Location: Le Mans
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Posted: Wed Feb 27, 2019 7:22 am Post subject: |
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That sir, is very true. I had a stock of old bellows stats but stupidly let friends have some over the years and am now down to my last spare which I am guarding preciously. It was all very well stuffing cardboard in front of the radiator to keep the water warm, but if the new ones fail then you're in trouble. |
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Rootes75
Joined: 30 Apr 2013 Posts: 3805 Location: The Somerset Levels
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Posted: Wed Feb 27, 2019 10:40 am Post subject: |
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Do I take it that like normal thermostats it cannot be repaired but has to be replaced? _________________ Various Rootes Vehicles. |
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badhuis
Joined: 20 Aug 2008 Posts: 1390 Location: Netherlands
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Posted: Thu Feb 28, 2019 1:26 pm Post subject: |
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Would be pretty difficult to repair. The bellows type is still available new - but at a cost. I bought one for my TR4 two years ago because at that engine, the bellows type opens up (or closes down) a water port which would not happen with a normal type of thermostat.
I would try a normal thermostat first to see what happens. _________________ a car stops being fun when it becomes an investment |
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Rootes75
Joined: 30 Apr 2013 Posts: 3805 Location: The Somerset Levels
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Posted: Fri Mar 01, 2019 11:56 am Post subject: |
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Will a normal AC type thermostat do the same job?
With the bellows type as long as the outer diameter where it seats is the same could I just get any replacement bellows type, I have seen a few on ebay? _________________ Various Rootes Vehicles. |
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MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
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Posted: Fri Mar 01, 2019 12:12 pm Post subject: |
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Yes, I believe so.
I imagine the Commer does not have a pressurized system. _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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Rootes75
Joined: 30 Apr 2013 Posts: 3805 Location: The Somerset Levels
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Posted: Sun Mar 03, 2019 4:28 pm Post subject: |
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After a fight got the thermostat housing off, its very awkward. The thermostat is well seized so obviosly needs replacing.
The problem though is the retaining ring, item 199 in the diagram, is a push fit and hold the thermostat in position. It is rusted solid and seized in place. Plenty of ease it oil applied and will try some heat on it next weekend. _________________ Various Rootes Vehicles. |
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