Hi all,

So, I've had my 1998 GP GT for 3 weeks now. It has about 143k miles on it. The issue I am having is the temp will spike high, near the red zone but, the temp warning light never comes on, on every three or four drives if it doesn't sit for a few hours. It doesn't matter the time of day, I've had it happen in the morning at 60, mid-day at 95+ or evening in the low 80's, also the style of driving doesn't seem to effect it, it has happened in stop and go as well as on the highway. This past weekend I replaced the tstat with 195 tstat and the radiator cap, bled the system and filled up the coolant, there are no visible leaks. From Sunday through Wednesday the issue seemed to be solved and has been running 10 to 15 degrees cooler.

So, on my way to work this morning the car never went about 195. Went home on my lunch break to pick up something for work, the temp went to 205. I was at home for 1/2 hour and left to go back to work. About ten minutes into my 15 minute trip to work, the gauge climbs to just outside of the redzone. I turn on the heat and the temp falls back into the 210 range in a couple of minutes. When I get to work I pop the hood and I see both fans running (Air off), while the gauge reads 195-200 range.

This one has me scratching my head as I can't find a pattern that causes it.

Thank you,
Scott

i thinks its about time to flush that dexcool out of your system if it hasnt been done yet. Ive got about the same mileage on my 04, and my car runs about 3 lines cooler with yellow coolant versus the dexcool

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DIY intake-HV3-3" catless dp-180 tsat-DIY shift kit-murphy custom tune

I plan to do one soon. I was going to take it to a repair shop for the flush.


Thank you,
Scott

-- Thu Aug 25, 2011 5:04 pm --

Well, drove home after the car sat three hours and fifteen minutes. The gauge peak at 210, was average of 195 to 200. Stop and go traffic, 90+ degrees outside.

Thank you,
scott

Is the heat in the car, from the heater core still as hot as with dexcool when running the prestone yellow?

Holy zombie thread batman.


The thermal capacity isn't different (assuming that the mixture % of both is the same) so there will be no temperature change of the HVAC system when switching coolants.

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"