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Re: [T3] thermostat & air cooling flaps


On 11 Apr 2002, at 12:51, Y and C Everhart wrote:

> I was wondering about that.  My Squareback runs at about 170-180 with normal
> driving, but takes awhile to warm up.  I have all warm up pieces intact and the
> car is all stock '66 1600.  I bought a 6v VDO temp gauge on ebay and  it seems
> to work well.  My beetle, on the other hand, has a 1641 in it and has run at
> about 220-240 degrees (with freeway driving) since the engine was built two
> years ago.  I drive it daily and have driven it across country twice (two round
> trips).  That temp. used to make me worry when I first built it, but hasn't had
> a bad effect on the engine so far.  My guess that the gauge is not accurate, but
> it is a brand new VDO (made in Mexico) gauge. Is that temp too high?  Would I
> notice decreased performance if that really is the temp?  Squareback runs much
> cooler, although everyone talks about type threes having cooling problems.  I
> don't see how with their larger fan and the amount of cfm's they put out.

Berg measured a lot of samples of a lot of new gauges and found that you 
couldn't depend on any brand to read accurately. His dipstick warning sensor 
are made to trip at 100C/212F so that you can calibrate it in boiling water 
any time you want. This is a test you could do also.

I think that Berg found that a temp below this, measured at the dipstick 
point, was safe, and that a higher temp was usually cause for worry. If your 
gauge is uncalibrated, or taking its measurement at a different point, then all 
bets are off.

In general, I believe that 220-240 is higher than we'd like to see, but I don't 
have any first hand data on this.

My personal take on type 3 cooling is that most of it comes from people who 
don't know, like, or understand, type 3s. I've never seen a problem, unless 
there are cooling system parts disabled or something else has been done to 
conpromise the engine or cooling system.

-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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