Engine temp. - Mercedes-Benz Forum
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#1 (permalink) Old 01-04-2009, 01:35 PM
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Engine temp.

Hi owned my 02 110cdi a while now but just noticed that engine temp rarely seems to get above 65 in the cold weather. Im thinking that the thermostat is at fault, but i havn't had a chance to look at it yet to confirm this. However could anyone tell me where its located on the engine? and how easy it is to change as i was going to renew the coolant soon anyway.
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#2 (permalink) Old 05-04-2009, 07:29 AM
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Did you manage to sort this out? Was it the thermostat (and where is it!?)

My engine temp only hits about 65, I'm sure it used to hit 80 so am suspecting my thermostat. I'm due a coolant change too.
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#3 (permalink) Old 05-04-2009, 11:51 AM
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No still hovers around 70 on a run even now its warmed up outside. I bought a thermostat awhile ago, when the gear change cables went. It just over £30 if i remember correctly. The thermostat is located to the left of the engine as you look from the front of the van under the fuel filter. Looks like a pig to get to! I havn't been brave enough to meddle just yet as i read a few horror storys on here when fuel filters are disturbed.
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#4 (permalink) Old 05-04-2009, 11:56 AM
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Oh forgot to say its held in place with multi pointed fixing bolts, but i think a 10mm socket will get them undone if there not to tight ( havn't tried mine so dont know). All in all van runs ok low 30s mpg heater warms up in the end so didnt want to cause further problems. If i fit it one day i will report back.
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#5 (permalink) Old 05-04-2009, 12:19 PM
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The fixings are Torx bolts, the correct sockets can be got from Halfords if there too tight to get off
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#6 (permalink) Old 05-04-2009, 03:10 PM
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I was after doing a fuel filter so could have a crack at the thermostat while I'm in there.

Hopefully it's a DIY job once the fuel filter is out?

GSF list one at £6 odd, europarts at £31! I'll pop to GSF and check it out.
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#7 (permalink) Old 05-06-2009, 08:43 AM
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I've cracked and am sticking mine in the garage tomorrow for a check. They're going to inspect the thermostat while the swap the filter for me.
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#8 (permalink) Old 05-07-2009, 09:29 AM
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Hopefully not talking to myself here!

Anyway, in my case, garage confirmed it's not the thermostat. The 'stat is opening the water getting to the right temp.

So it's the sensor or the actual dash dial.

Anyone know if I can borrow a mate's dash and plug it in? That should let me check if it's the dial!
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#9 (permalink) Old 05-07-2009, 10:36 AM
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I did wonder if it was my sensor and dial playing up as hot air blower warms up quite quick for a diesel. The sensor comes complete with the thermostat and housing case which is why it so expensive. I think the dash has to be coded to the van but temp dial may work regardless im not sure.
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#10 (permalink) Old 05-07-2009, 03:50 PM
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If the sensor is faulty, would it just mess with the dial on the dash or affect the fueling as well?

If it's just reporting wrong, it can stay wrong but if it's running wrong, I would like to fix it!
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