Anyone with a v6 diesel engine need some input please help! Thermostat issue

[niketpatel71]

Hey guys after consulting with a good source of mine I just wanted to check if this is normal. After starting my car from cold it takes the thermostat 3 miles or 13 mins to warm up to 85C in fairly average traffic conditions. If there is heavy traffic and the car is hardly moving the thermostat will take longer to warm up ie 15 mins. And if i turn the heater on straight away once the thermostat reaches 85c it will drop to 80 for a minute or so before rising up to 85c again. Do I need a new thermostat is this normal?

 

[Deleted member 11979]

Pretty normal I would say, the more economical the engine the longer it takes to warm up.

Our Golf actually raises the revs if on idle and the heater on full as the heater takes more heat out than the engine is "wasting"

 

[gIzzE]

Sounds quick.

But should be getting to just over 90ºc.

How old is it? Stats last around 5 years before starting to play up.

 

[niketpatel71]

58 plate so just about to turn 5 now. Its so hard to read the gauge on the electric dials basically on my stat there is one white bar and one black bar above the 80c mark.

 

[gIzzE]

At 5 years old I would consider swapping it anyway, if it has not gone it is probably on its way.
I did mine myself, cost me £38 from Mercedes. Followed a guide on one of the forums and took me around 40 minutes. I am not mechanically minded btw.

 

[Merc Owner 2B]

Can you post a pic of the guage when at normal running temp? We can then better advise.

I wouldn't change it unless you have to. If you do then use only a genuine one.

 

[niketpatel71]

this is where the stat normally sits

 

[niketpatel71]

once warmed up after 3 miles

 

[GordonTarling]

Quite normal.

 

[gIzzE]

That is sitting at 90°c, no problem at all.

 

[Vlad]

I've just returned from a very cold part of Northern Europe and it took 17km's before the engine got upto temp...diesel Astra. Yours is completely normal.

 

[bpsorrel]

That sounds normal, mine isn't too different to that.

 

[Merc Owner 2B]

this is where the stat normally sits

I think you may have mis-read the gauge. The little mark between 80 and 120 is in fact 100 degrees. Since the reading is just over halfway between 80 and the 100 degree marks you are reading just over 90 degrees. As others have said,this is spot on the 92 degree spec.

 

[Deleted member 11979]

I've just returned from a very cold part of Northern Europe .

Was that Exeter?