200tdi over heating

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doh91

doh91

New Member
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Location
Birmingham
I have just bought my 1st land rover it is a defender 90 and it has had a 200tdi engine conversion and the gauge says that it is red hot but non of the pipes are hot they are just warm does anyone have any ideas.:confused:
 
About half.

My 90 currently ought to be off the red and beyond on a nice motorway drive. You can put a resistor in series to knock the resistance up and hold the guage back, get the engine warmed up a bit till the guage sits halfway. Then measure the resistance between the tip of the sensor and the main body of it. For easy counting lets say it reads 300Ohms, you then therefore want the sensor to read 300ohms at normal operating temperature. So get the engine up to temp, with the heater blowing nice warm air and measure it again, say it reads 40ohms now, so you need a 260ohm resistor, with the sensor "held back" that should sort your guage.

OR get a matched sensor, mine used to be a 2.5NA, so I am going to screw the NA sensor into the top of the block where the glow plug sensor sits (I have a manual glow plug button).

Or pay £45 and buy the right guage.
 
discomania said:
About half.

My 90 currently ought to be off the red and beyond on a nice motorway drive. You can put a resistor in series to knock the resistance up and hold the guage back, get the engine warmed up a bit till the guage sits halfway. Then measure the resistance between the tip of the sensor and the main body of it. For easy counting lets say it reads 300Ohms, you then therefore want the sensor to read 300ohms at normal operating temperature. So get the engine up to temp, with the heater blowing nice warm air and measure it again, say it reads 40ohms now, so you need a 260ohm resistor, with the sensor "held back" that should sort your guage.

OR get a matched sensor, mine used to be a 2.5NA, so I am going to screw the NA sensor into the top of the block where the glow plug sensor sits (I have a manual glow plug button).

Or pay £45 and buy the right guage.
Click to expand...

i've never paid more than a fiver for 200Tdi guage - the 200 and TD/NA sender has a different thread hence why you can't use the orginal sender

keep your eyes open on ebay and get the right sender rather than messing about with resistors
 
Sean said:
i've never paid more than a fiver for 200Tdi guage - the 200 and TD/NA sender has a different thread hence why you can't use the orginal sender

keep your eyes open on ebay and get the right sender rather than messing about with resistors
Click to expand...

I looked a month ago and I could only see ones for £50 odd. I will look again then.

Its a 300tdi one I need.
 
discomania said:
So get the engine up to temp, with the heater blowing nice warm air and measure it again, say it reads 40ohms now, so you need a 260ohm resistor, with the sensor "held back" that should sort your guage.
Click to expand...

do a search on here to see how many people moan about how long it takes for their heater to get anything close to warm - you might then see how daft your method is
 
Sean said:
do a search on here to see how many people moan about how long it takes for their heater to get anything close to warm - you might then see how daft your method is
Click to expand...

Haha well, fine then - touch the stat housing and when its too hot to hold your hand there measure again.

The resistor idea works perfectly well; and it costs about 5p to do... excellent...
 
discomania said:
Haha well, fine then - touch the stat housing and when its too hot to hold your hand there measure again.

The resistor idea works perfectly well; and it costs about 5p to do... excellent...
Click to expand...

all the resistor does is to trick the guage into reading whatever you want for any single given temp - a downside of this is that the guage will only be accurate at that temp (not that they are much more than an indicator anyway) - it's just not a elegant way of doing it

dont be daft by spending £50 on a new guage - buy something like this instead, you get a free patina on the guage as well so it wont look silly on yer dusty old dash


http://cgi.ebay.co.uk/defender-90-1...ts_Vehicles_CarParts_SM?hash=item300281398786
 
i bought my 300TDi gauge for £10 - the dial at the back differs, which is one way of telling what gauge is what.

Oh, if you have a disco engine, what colour is the plastic surround for the sender? If its green, then you need to buy a black sender for your Defender gauge.
 
boydy1989 said:
i bought my 300TDi gauge for £10 - the dial at the back differs, which is one way of telling what gauge is what.

Oh, if you have a disco engine, what colour is the plastic surround for the sender? If its green, then you need to buy a black sender for your Defender gauge.
Click to expand...
Or some black paint.

Sorry. Been drinking.
 
Don't mess about with resistors unless you are confident with sufficient elecronic knowledge to work out what you need. Take your sender out and identify if it is the fine thread or the coarse (most likley the fine thread like mine was) Then visit Steve Parker for a tenner posted you will sort out your problem its very common to mismatch the sender when the conversion is done its easily overlooked.


Steve Parker Land Rover Servicing, Land Rover Spares and Repairs
 
hi
i used steve parker bits when i put a disco 200 in my 110, i used the sender he gave me but my temp gauge sits right at the end of the white when at running temp but the pipes aren't really warm enough to suggest that its running as hot as the gauge says, i did 2000 mile round trip to scotland and back last year on my hols and the needle never budged, would you suggest i changed my temp gauge aswell. the engine before was 2.5n/a

cheers all
levy

:)hope you all had a merry xmas:)
 
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