GTA header tank pressure cap

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Postby blueg33 » Wed Apr 17, 2013 7:16 am

Well, new cap fitted and drive to Silverstone and back, no recurerence of the problem of fluid bubbling out, but temp still not getting right up to 90 degrees when moving, it gets there when idling so maybe the rad is just being efficient?
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Postby jon_viola » Wed Apr 17, 2013 8:42 am

Normal behaviour unless your absolutely ragging it....
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Postby JohnC » Wed Apr 17, 2013 9:01 am

blueg33 wrote: but temp still not getting right up to 90 degrees when moving,

Remember the GTA`s stat is rated at 88 degrees, so during normal running the needle should be below the 90 mark on the gauge. Mine runs about 1 to 1.5mm to the left of the 90 mark.
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Postby blueg33 » Wed Apr 17, 2013 12:04 pm

Thanks guys, mine sits about 2 to 3 mm left of the 90 mark, so is probably about right.

(Before the rad was replaced it was always at 90 unless turbo was on boost in which case it gradually climbed.)
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Postby BIG_MVS » Wed Apr 17, 2013 12:09 pm

Looks like your new rad has fixed your alp.

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Postby si21 » Wed Apr 17, 2013 1:24 pm

blueg33 wrote:Well, new cap fitted and drive to Silverstone and back, no recurerence of the problem of fluid bubbling out, but temp still not getting right up to 90 degrees when moving, it gets there when idling so maybe the rad is just being efficient?


Do you have a proper GTA/Renault thermostat fitted as the cheap alternatives are wrongly designed for the application. The sealing washer on the bottom of the cheaper alternatives are too small and constantly allow water around the whole system and don't control the temp/water flow properly.

That said it was a very cool day and my Atmo has a 3 core rad and a genuine thermostat fitted it sat at 86-87 degrees on an aftermarket temp gauge so I would not think that was too out of the ordinary.

Previously with a cheap thermostat fitted the engine took ages to warm up and burnt huge amounts of fuel, now it comes up to temperature withing 2-3 miles approx.

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Postby blueg33 » Wed Apr 17, 2013 1:35 pm

si21 wrote:
blueg33 wrote:Well, new cap fitted and drive to Silverstone and back, no recurerence of the problem of fluid bubbling out, but temp still not getting right up to 90 degrees when moving, it gets there when idling so maybe the rad is just being efficient?


Do you have a proper GTA/Renault thermostat fitted as the cheap alternatives are wrongly designed for the application. The sealing washer on the bottom of the cheaper alternatives are too small and constantly allow water around the whole system and don't control the temp/water flow properly.

That said it was a very cool day and my Atmo has a 3 core rad and a genuine thermostat fitted it sat at 86-87 degrees on an aftermarket temp gauge so I would not think that was too out of the ordinary.

Previously with a cheap thermostat fitted the engine took ages to warm up and burnt huge amounts of fuel, now it comes up to temperature withing 2-3 miles approx.

Si21


Thats a question for CLee as he rebuilt the engine. I would imagine he fitted a genuine one.
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