Who does higher than 18psi header Caps for std fitment?
17-12-2005, 12:41 PM
#1
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Who does higher than 18psi header Caps for std fitment?
as i've just been done a local private road between 2 roundabouts (long enuff to hit about 105-110 mph)
was goin for it for about 5-10 minutes, and even tho my coolant temp was 91oC the header was seepin coolant (i've tried a few std caps and still does the same)
it only happens on that sort of abuse, normal top speed runs and its fine.
Can anyone advice me.
cheers Danny
was goin for it for about 5-10 minutes, and even tho my coolant temp was 91oC the header was seepin coolant (i've tried a few std caps and still does the same)
it only happens on that sort of abuse, normal top speed runs and its fine.
Can anyone advice me.
cheers Danny
17-12-2005, 12:53 PM
#2
have you got a standard header tank?
i have, and i find that the header tankl splits before the cap lets water out any way lol. im running with a split tank at mo (well not running , waiting for a new to arrive
)
if your got a split tank it will lose pressure and force water out when it heats up.
i would like to upgrade to a high pressure tank and cap my self.
i have, and i find that the header tankl splits before the cap lets water out any way lol. im running with a split tank at mo (well not running , waiting for a new to arrive
)if your got a split tank it will lose pressure and force water out when it heats up.
i would like to upgrade to a high pressure tank and cap my self.
17-12-2005, 01:29 PM
#6
just finding my feet
whats strange is the people running standard header tanks with no issues 
try putting less water in so the air has more room to presurise and compress as the water wont allow it too
try putting less water in so the air has more room to presurise and compress as the water wont allow it too
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17-12-2005, 02:56 PM
#8
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on my heap , my alloy header tank was distorted and the cap didnt seat properly. had loads of caps and didnt fix my leaking problem. sent the the crappy tank to a local firm that machined the cap neck and it was ok after that.
, my alloy header tank was distorted and the cap didnt seat properly. had loads of caps and didnt fix my leaking problem. sent the the crappy tank to a local firm that machined the cap neck and it was ok after that.
17-12-2005, 08:15 PM
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-I had the same on my old spec-r tank..
it was the rubber seal on mine i just took the cap to halfords and opened up a lot of boxes till i found one to fit 22psi was what i found
it was the rubber seal on mine i just took the cap to halfords and opened up a lot of boxes till i found one to fit 22psi was what i found
18-12-2005, 12:16 AM
#16
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Sorted it.
for all the help.
i got a old header tank, and made it into a pressure testin Rig, usin a air compressor and a regular.
I tested the one i had on the car and my spare ones i tried, and all of them started leakin at 8-12psi,
Then tested one off my Xr2, and a new pattern part one i brought today, and they both started leakin at 17-9 psi.
I'll let you know tomorrow if it cures it, if not i'll take the header tank off the car, and test the cap's on it, and pressure test that.
for all the help.i got a old header tank, and made it into a pressure testin Rig, usin a air compressor and a regular.
I tested the one i had on the car and my spare ones i tried, and all of them started leakin at 8-12psi,
Then tested one off my Xr2, and a new pattern part one i brought today, and they both started leakin at 17-9 psi.
I'll let you know tomorrow if it cures it, if not i'll take the header tank off the car, and test the cap's on it, and pressure test that.
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