[urq] Water temp

Phil Payne quattro at isham-research.com
Fri Jan 9 12:38:47 EST 2004

> I've posted a couple times regarding water temps, but I still have
questions/concerns...Here's the deal:  Motor is a 3B with a VDO 250F (120C) max water temp
gauge, signal comes from MFTS (rated at 118C per ETKA).  The engine seems to run too cold
_assuming_ the gauge is giving a correct reading.  It reads about 170F (77C) in most
conditions.  This summer it would get to about 180-185F (85C) in hot hot traffic.  I put a
factory "blocker" behind the grill, in front of the Aux Rad with little effect.

I have this problem on two cars at present - one MB engine and my own MC-2.

On both, the main radiator starts to get hot MUCH sooner than it should.  I've changed the
thermostat (7C) so it's not that.

All three of these engines (including yours) have the alternate water path for the turbo
bearing afterrun pump - and it looks to me like that path bypasses the thermostat.

I've been wondering of late if the pump is running when it shouldn't be.

  Phil Payne
  +44 7785 302 803

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