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OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 120

2015 Defender 90 Puma 2.2 XS CSW Corris Grey

Incorrect Water Temp Guage reading 300tdi

Temp Sender 300 TDi engine swap from 200Tdi

This was a project Defender i took on which was not finished correctly by the previous owner, among a host of other things when the engine was eventually running I had a problem with a higher than expected reading on the engine water temperature gauge, initially i thought it may be a faulty thermostat or a blown cylinder head gasket, however, it seemed to be running reasonably well, the thermostat was removed and tested, the engine temperature was checked using a digital laser thermometer which confirmed the engine was not overheating.

Turns out there are two types of sender for the 300tdi, one has a Green band and one has a Black band, the correct sender in my case was the one with the Black band.

I fitted a new sender with the Black band (purchased from Steve Parker 4x4) and its working correctly now, In my case a Green band sender had been fitted which makes the temperature gauge read incorrectly high.

I’ve removed the viscose fan and in the process of converting to an electric fan, i will post up how this goes.

Cheers
Old Jock

28th Nov 2018 6:43pm

Grouse

Member Since: 16 Apr 2012
Location: on the hill
Posts: 512

There are also differences in the gauges - on a 300tdi, anything other than the correct gauge shows it as running hot

28th Nov 2018 8:21pm

OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 120

Cheers Grouse, The Defender was originally a 200Tdi now with a 300Tdi engine transplant, temp gauge readout seems to be ok now and about what i would expect

28th Nov 2018 8:29pm

OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 120

Got a fan, themostatic switch and fused relay all for just over £60, made up some brackets to fit the fan to the radiator, all sorted, result.

Cool

30th Nov 2018 6:43pm

Norton

Member Since: 10 Sep 2018
Location: Buckinghamshire
Posts: 28

1990 Defender 90 2.5 n/a Diesel ST Nato Green

I found 6 different sender options when I did an engine swap.

6th Dec 2018 9:29pm

OJ

Member Since: 23 Nov 2018
Location: North of Edinburgh
Posts: 120

6 different types, Amazing, if i was doing it again i think i would try to match the guage and sender, but that wouldn’t be as interesting

Cheers
OJ

6th Dec 2018 9:58pm

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