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Old 08-16-2018, 06:02 PM   #1
SIRPAULGERMAN
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Default Surge tank is problematic

Well I just replaced the original surge tank because it was leaking when the car get hot, it was leaking trough the cap, so i replaced the cap and it did not help.
Anyway I got another surge tank from Rock auto (ULTRA-POWER 603121 ) and I am having the same problem, is leaking trough the cap. this cap is different you cant tied all they way in.

Any particular idea how to fix this problem ?

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Old 08-16-2018, 07:59 PM   #2
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Default Re: Surge tank is problematic

Other than the possibility of finding poorly made aftermarket surge tanks and pressure caps, unless you can determine what the operating pressures are in your cooling system (overheating leading to higher pressures), guessing can be expensive. If you can, try borrowing a cooling system pressure tester from Autozone or Advance Auto (if they have one to borrow). Adapters for radiators, surge tanks and pressure caps complete these kits to test cooling systems and caps separately. A hand held sir pump pressurizes the cooling system or cap to factory specified pressures for the vehicle to find weaknesses in hoses, clamps, fittings, radiator, thermostat gaskets and heater cores. Pressure caps are tested for rated pressures.

System operating pressures for '01 SL1/SL2/SW are 15 psi.
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Old 08-16-2018, 08:09 PM   #3
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Default Re: Surge tank is problematic

Take a spare radiator cap, shove a tire valve stem in it and use any tire pressure gauge to check pressure. DIY pressure tester for under $5; though I don't have a clue what a 'proper' pressure tester costs so maybe that $5 isn't much of a savings.

Similar idea for the older style cooling system: https://www.instructables.com/id/Mak...essure-Tester/

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Old 08-16-2018, 08:09 PM   #4
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Default Re: Surge tank is problematic

Quote:
Originally Posted by fdryer View Post
Other than the possibility of finding poorly made aftermarket surge tanks and pressure caps, unless you can determine what the operating pressures are in your cooling system (overheating leading to higher pressures), guessing can be expensive. If you can, try borrowing a cooling system pressure tester from Autozone or Advance Auto (if they have one to borrow). Adapters for radiators, surge tanks and pressure caps complete these kits to test cooling systems and caps separately. A hand held sir pump pressurizes the cooling system or cap to factory specified pressures for the vehicle to find weaknesses in hoses, clamps, fittings, radiator, thermostat gaskets and heater cores. Pressure caps are tested for rated pressures.

System operating pressures for '01 SL1/SL2/SW are 15 psi.
I was able to fix it by tying the cap when the car was hot, it stop the leaking however I dont feel confident that it is going to last

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Old 08-17-2018, 06:35 PM   #5
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Default Re: Surge tank is problematic

Quote:
Originally Posted by fetchitfido View Post
Take a spare radiator cap, shove a tire valve stem in it and use any tire pressure gauge to check pressure. DIY pressure tester for under $5; though I don't have a clue what a 'proper' pressure tester costs so maybe that $5 isn't much of a savings.

Similar idea for the older style cooling system: https://www.instructables.com/id/Mak...essure-Tester/
I reviewed that link. It describes older radiator caps. The idea may or may not be applicable to surge tanks with plastic pressure/vacuum caps. Did you adapt a surge tank cap with a tire valve? I don't know if our pressure caps lends itself to inserting a tire valve among the pressure and vacuum valve unless they're removed...........

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