Re: Overheating... another thread. (first one bounced)

["Brad Sayer" <vwrocco85@hotmail.com>]

Having much the same situation, I tend to agree. Having done all the same 
work, it still runs a little hotter than it should. Its the only thing left. 
  I plan on doing a complete tune up in the next coouple of weeks:
Plugs, wires, O2 sensor, fuel filter, timing, idle, mixture, injector ) 
rings, etc.  I will let you know if that has any effect on my temps.

Brad

87 16V


>From: "Allyn" <amalventano1@home.com>
>To: "Brian McGarvey" <brianm@zbt62.eastnet.gatech.edu>, 
><scirocco-l@scirocco.org>
>Subject: Re: Overheating... another thread. (first one bounced)
>Date: Thu, 7 Jun 2001 14:35:19 -0400
>
>brian + list,
>     same is happening to mine. same exact symptoms on the temps, 110 on 
>hwy,
>120 when on it. i havent let it hit that 135 mark, highest i've seen it is
>120 at an idle. i refuse to let it go much higher as that was the end cause
>of rings going on my 88 16v back in 94 (in the middle of a road trip, arg).
>i've done the same as brian, even more i think. water pump, thermostat 
>(also
>did holes), radiator flush, 60/40 antifreeze/h2o, etc. the flush did drop 
>it
>some but not alot, and it will still climb up there at an extended idle,
>given the chance.
>     whats funny is that my other 16v (the one i yanked the motor from 
>before
>it went to the yard), ran extremely cool, just like my original 88 16v did.
>it would run at 90-100 oil temp driving, go to 110 at idle. water temp 
>would
>go up 3/4 and down to 1/2 when the fan kicked on. also it wouldnt break 1/2
>temp at idle with the a/c on (low speed fan could keep it there easily). on
>top of all of this, both of those cars were driven in tampa, FL in the
>summer!
>     i believe in the end that our problem lies in tuning. not necessarily
>just timing, but mixture and o2 sensor. i have a feeling that either our
>mixture drifts over time (to explain hot while driving), and possibly our 
>o2
>sensor drifts in a certain direction over its lifetime, adding to the hot
>idle. a well tuned engine should run damn cool, and i think slight drifts,
>combined with our crazy compression ratios, all adds up to cause us pain.
>lemme know what you guys think
>al
>
>Allyn Malventano, ET1(SS), USN
>87 rocco 16v (rieger gto - green - 'der rocco' - restoration in progress)
>87 jetta 8v wolfsburg 2dr (260k, still tight :)
>
>
>----- Original Message -----
>From: "Brian McGarvey" <brianm@zbt62.eastnet.gatech.edu>
>To: <scirocco-l@scirocco.org>
>Sent: Thursday, June 07, 2001 11:45 AM
>Subject: Overheating... another thread. (first one bounced)
>
>
> > Hey Ya'll.
> >
> > I got stuck in traffic today and my rocc (87 16v) nearly overheated. It
> > would have If I hadnt cranked the heat on full blast (3 resistor is
> > hosed).
> >
> > symptoms.
> > at idle it jumps from normal op temp to the dot just below the overheat
> > line (not the led) oil temp got to about 135C noramlly 110C when driving
> > faster. If I hot rod the car even at hwy speeds the temp jumps to 120C+
> > and the water temp rises.
> >
> > Things done to date.
> > R&R water pump
> > R&R thermostat (drilled 2 little holes)
> > R&R all belts.
> >
> > drainded old std green anti-freeze
> > put new anti freeze in (upper rad hose) std green stuff.
> >
> > system burped once. dropped temp a little the other day a cincy ( had a
> > great time)
> >
> > Things on the todo list.
> > change out fan switch w/ 160 degree 3 pole swtch
> > pn 8.170.03 fan switch 3 pole.
> >
> > change out antifreeze w/ water wetter.
> >
> > If none of these things work I'm left with the following options.
> > #1 radiator is stopped up. and needs flushing.
> > #2 the motor is stopped up and needs flushing.
> > #3 new thermostat is foobar. not unheard of but unlikely.
> >
> > any suggestions of flushing the system?
> >
> > brian
> > 87 16v all the cool mods gotta wait till it runs good.
> >
> >
> >
> > --
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> >
>
>
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