Series 2A thermostat

 
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Peter49
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PostPosted: Fri Sep 14, 2018 9:35 am    Post subject: Series 2A thermostat Reply with quote
Hi A friend in Australia has a 1965 Series 2a with the top section of the housing has the o-ring inside, or at least a groove in which one should go? But the part he has is from an earlier series 2 so the only thermostat which will fit is the modern flat style one, which makes it overheat as it doesn't allow the radiator to flow properly. Can anyone suggest where to get the correct upper section thermostat housing or correct thermostat? I think the incorrect part he has is 5511956.

Thanks again
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Peter49
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PostPosted: Fri Sep 14, 2018 9:39 am    Post subject: "A thermostat Reply with quote
He adds
mine has a different shape inlet to suit the shallower skirted type thermostat.
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Alan Drover
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PostPosted: Fri Sep 14, 2018 11:01 am    Post subject: Reply with quote
Pete, try Dunsfold Land Rovers.
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BigJohn
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PostPosted: Wed Sep 26, 2018 5:47 pm    Post subject: Reply with quote
The earlier type thermostat has a skirt on it which closes off a bypass line in the thermostat housing. When using a later (thinner) thermostat this bypass line doesn't get closed off when the thermostat lifts once normal engine temperature has been reached. The result of this is that the circuit to the radiator is being short circuited and as most of the cooling water is not passing through the rad, the engine can overheat. The later type doesn't do this. It just relies upon the cooling water leaking past the thermostat when it is closed and then fully flowing when normal working temperature is reached.
You need to match both the thermostat and it's housing to get this right.
Any later thermostat housing from either a Series3 or early 90/110 2.25litre petrol engine should fit (some of the early petrol 110s also used this old type of thermostat, but you may have to adapt the heater pipes)
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Peter49
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PostPosted: Wed Sep 26, 2018 6:02 pm    Post subject: Reply with quote
Thanks I'll pass this on.
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