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 Defender M57 engine cooling issue
Doby92

Post3rd Jan 2025 8:53am 		Forum: Maintenance & Modifications · Replies: 38 · Views: 2250 · Subject: Defender M57 engine cooling issue
what is the bypass waterway, the Thermostat only has a simple spring loaded valve, either open or closed, no other valve in it.
 Defender M57 engine cooling issue
Doby92

Post3rd Jan 2025 4:36am 		Forum: Maintenance & Modifications · Replies: 38 · Views: 2250 · Subject: Defender M57 engine cooling issue
Took it up the hill that caused it to get to 110 deg c at lunchtime today, temp a bit cooler at 29c.

No Thermostat
Electric fan on
Start temp at bottom of steep section 92c
Temp got up to 101c a ...
 Defender M57 engine cooling issue
Doby92

Post2nd Jan 2025 4:07am 		Forum: Maintenance & Modifications · Replies: 38 · Views: 2250 · Subject: Defender M57 engine cooling issue
So I took the thermostat housing off and removed the thermostat from the housing and refitted the housing to the engine. Filled with coolant, ran it at high idle to get the air out with the heater on. ...
 Defender M57 engine cooling issue
Doby92

Post1st Jan 2025 1:59am 		Forum: Maintenance & Modifications · Replies: 38 · Views: 2250 · Subject: Defender M57 engine cooling issue
Following your issue as I have similar, just completed a M57n with zf6 install. Runs on the flat around 92-95c at 100km/h on a 30c day. If i push it a bit it goes up to 100c.

I took it up a big 15% ...
 
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