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Thread: S14a overheating!!! Just can't figure this out

  1. #1
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    S14a overheating!!! Just can't figure this out

    So my s14a seems to overheat after a few minutes driving around normal. Expantion tank overfill and coolant comes out. I've changed thermostat to mishimoto one, inspected watwrpump and it's fine, Rad flows, I bled the system about 6 times now using the bleed bolt and burping. And still nothing. No signs of headgasket leak. It's doing my head in. I can't even drive it to have a leak test as it won't make it. Any help

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  2. #2
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    Have you changed the rad cap?

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  3. #3
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    No not yet. I did notice the Rad cap is soft under the sticker so I don't know if its supposed to have a bit of give. But hisses. I've just done a compression test and it's 135psi on all 4 cylinder these are readings bare in mind its a high milage sr20det and a little video of what I mean about Rad cap. And noticed my spark plug tips are yellow. I've bled the system again for the 7th time no air. And also water pump is absolutely fine. http://cloud.tapatalk.com/s/607b1b33...417-WA0001.mp4

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  4. #4
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    If the rad cap is releasing pressure (aka f*cked), it'll allow the water to boil and over heat. For such a small expensive I'd get an uprated rad cap to rule it out.

  5. #5
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    Where can I get an uprated one to fit oem Rad. As don't wanna order something that won't fit. Cheers

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  6. #6
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    Mishimoto is a good brand. I'd avoid "JDM" type brands unless you know its from a reputable source and not a Chinese copy. Conceptua Tuning on ebay are legit so they would most likely be able to sort you out with what you need

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  7. #7
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    Cheers I'll have a look at mishimoto and the other company

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  8. #8
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    Just had a look at jdm garage and found the blitz 1.3 blue cap there 22 will this be OK? As conceptua hasn't got any and neither has mishimoto on their sites.

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  9. #9
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    I recently got an HKS one from Conceptua, seemed to have plenty in stock, seems ok so far although didnt have any overheating issues before, just looks nicer than the stock one!

  10. #10
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    Ordered a blitz type 2 Rad cap at 1.3 I'll keep everyone update.

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  11. #11
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    I was thinking could it be maybe radiator not keeping up? Maybe need an upgrade from standard old shitty one

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