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It's fully open around 96c
P38A Alternative Thermostat - V8
- Thread starter Montyjohn
- Start date
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If you new stat doesn't fully open, then it's faulty.
Also remember when fully open the stat only blocks the bypass hose (in the centre at the top), so all the coolant flows via the radiator. The flow from heater back to pump still flows because these two are offset & not blocked.
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Also remember when fully open the stat only blocks the bypass hose (in the centre at the top), so all the coolant flows via the radiator. The flow from heater back to pump still flows because these two are offset & not blocked.
Got my old thermostat off today and I can confirm that the old one does fully open and it fully shuts off the top 18mm inlet.
It also opens quicker than the new one so I'm going to refit the old one and send the new one back.
Despite looking crusty on the outside it was very clean inside so might run it for a couple more years then replace it with a genuine item for peace of mind.
Lesson (which I'm sure most already knew): don't bother with aftermarket thermostats for the P38. If you decide to risk it, fully test it to ensure it not only opens, but also isolates the bypass as it should.
It also opens quicker than the new one so I'm going to refit the old one and send the new one back.
Despite looking crusty on the outside it was very clean inside so might run it for a couple more years then replace it with a genuine item for peace of mind.
Lesson (which I'm sure most already knew): don't bother with aftermarket thermostats for the P38. If you decide to risk it, fully test it to ensure it not only opens, but also isolates the bypass as it should.
Datatek
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Stats are a really dodgy area these days, all made in China I suspect.
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I replaced the one on my Jag as preventative maintenance. No original available so best aftermarket I could find fitted. Utter ****e. Refitted original and just hope to hell it never fails.
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Checked the thermostat on a mattress bikes last night. Stamped 50c and works perfectly!. Looked at a new temp sensor... £42!!! 
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Mattress!? WTAF autocorrect!?Checked the thermostat on a mattress bikes last night. Stamped 50c and works perfectly!. Looked at a new temp sensor... £42!!!
I figured you were trying to say "on the mistresses bike"
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Matchless?Checked the thermostat on a mattress bikes last night. Stamped 50c and works perfectly!. Looked at a new temp sensor... £42!!!
- Posts
- 12,628
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- Sud ouest France !
- Posts
- 33,600
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No.. Maybe i meant mates.. it just tried to autocorrect that to mattress. But now it tried to autocorrect mattress to mates
Datatek
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AI = Artificial Idiocy at workNo.. Maybe i meant mates.. it just tried to autocorrect that to mattress. But now it tried to autocorrect mattress to mates
I turn off autocorrect.
