M10 running hot

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goosiegander
Zonegoose
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Location: East Anglia

Post Mon Apr 13, 2015 12:36 pm

HI All,

Perhaps I could have some thoughts on the following,

So far on my M10 316i i have replaced the following, viscous clutch, thermostat & Coolant. Flushed the system through

The car will warm up and hold temp, low revs driving will maintain temp,

High revs driving will stay at halfway temp and go to 3/4 when waiting in traffic,

Sustained high rev driving, ie cruising at 3000rpm on a dual carriageway will get hot and go to 3/4 necessitating reducing speed and switching the blower on full hot, far from ideal now that summer is here...

I Have a new rad cap turning up today, next step after that was going to be drilling a 2mm relief hole in the stat...

Thoughts/advice appreciated

Brgds/Chris
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daimlerman
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Post Mon Apr 13, 2015 1:30 pm

So,all is normal until you are stationary in traffic or giving it a few extra beans?

A avoid stopping in traffic
B drive it like Miss Daisy



I would think that the waterpump is a prime suspect,followed by a partly blocked radiator.
Youth is wasted on the young.
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goosiegander
Zonegoose
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Location: East Anglia

Post Mon Apr 13, 2015 1:58 pm

Sorry also replaced the waterpump with new genuine item...

Wynn's cooling system flush?

:?
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Andyboy
Alpina Colada
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Location: Notts

Post Mon Apr 13, 2015 2:12 pm

The rad is shagged. M10 rads are buggers for silting up - the fact that it cools off when you put the heater on confirms it. You may find on closer inspection that a lot of the cooling fins are missing.
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DanThe
E30 Zone Team Member
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Post Mon Apr 13, 2015 2:12 pm

Drilling the thermostat stops it working properly

As jagman says there is a good chance the radiator is partially blocked, also some M10 cars had a blanked out kidney grill which reduced the airflow to the radiator so thats worth investigating too
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goosiegander
Zonegoose
Posts: 2544
Joined: Sun Nov 19, 2006 11:00 pm
Location: East Anglia

Post Mon Apr 13, 2015 3:23 pm

I'll give the rad a dose of cooling flush then guys,

Perhaps there will be a local firm that can re-core it for me,

Is there a tried and tested method of cleaning the sh*t out of these or should I not bother and just replace the rad?

Kidney grill is standard Dan: https://www.facebook.com/media/set/?set ... d1d60116c5

Cheers
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daimlerman
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Post Mon Apr 13, 2015 4:39 pm

http://www.gsfcarparts.com/parts/coolin ... r-radiator

Better price than either carparts4less or ECP!

:D
Youth is wasted on the young.
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DanThe
E30 Zone Team Member
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Post Mon Apr 13, 2015 7:30 pm

Cant see through the kidney on those pics but it looks like a decent E30 :D

Just buy a new rad, its less faff and more reward
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