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Cooling Pro (just Jap) Oil Cooler Kit Keeps Leaking Oil

Guilt-Toy

By Guilt-Toy,
in Engines & Forced Induction

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

I got one of the light weight 19 row blue oil cooler kits, and oil keeps leaking from it.

I have tried to replace the o rings with some good quality wurth ones which made no difference.

I then got hold of some locktight paste stuff (hydrolic thread sealant) which is suppossed to hold 1000psi once cured AND IT STILL LEAKS.

Does anyone have any ideas on how i can stop this from leaking? should i just use thread tape?

Its leaking on the fittings that screw onto the sandwitch plate on the block.

Has anyone had this issue before? how did you fix it.

I hate oil leaks more then anything else, leaking 300v chrono is driving me INSANE!!!!

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SECURITY Grand Master

SECURITY

Posted
Posted

even if you ask justjap themselves, they'll tell you to use thread tape on pretty much all of their parts that are meant to hold oil pressure.

ive tried the justjap oil pressure gauge which leaked until i used thread tape on it, same with the oil cooler kit i had.

Beer Baron Grand Master

Beer Baron

Posted
Posted

yes, chinese oil cooler kits leaking is nothing new. about the only ways out are to try and seal it with thread tape (not a very nice solution), or just chuck it out and buy a nicer kit like one of the japanese ones. i have 2 trust kits at the moment on 2 of my cars and neither has leaked so much as a drop. ever. and no thread tape, or goo, or o-rings needed. just bolt it on and away you go.

if you use thread tape be careful not to let it get into the lines etc.

swanny180 Proficient

swanny180

Posted
Posted

Ive basically also heard whats already been said in the thread.

That the Just Jap oil cooler kits are well known to require thread tape in most cases to get a good seal, or else you can have problems with leakage.

Hope you get it sorted soon mate!!

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

go return it, money back gurantee I think?

but most of JustJap parts are chinese crappy knock offs...

Save yourself the headache and go get a Permacool relocation kit & thermostat & and quality B&M core. Same price-"ish" but 300% the quality!

GeeTR Grand Master

GeeTR

Posted
Posted (edited)

Lol @ another leaking china kit :laugh:

GT - apart from the poorly made / designed block adapter, how do you find the cooler core itself? Does it look reasonable?

Outa interest, what type (standard) of fitting is leaking? Theres not a simple 370 AN / 450 SAE / JIC mix up??

Edited by GeeTR
frozenwaffles Mentor

frozenwaffles

Posted
Posted

the fittings are all fine. mine leaked when i first installed it in the exact same place. just make sure you do everything up super tight! my kit is perfect and its all looking very mickey mouse! i think they are great... its not like they are actually that cheap anyway...

Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted
Lol @ another leaking china kit :laugh:

GT - apart from the poorly made / designed block adapter, how do you find the cooler core itself? Does it look reasonable?

Outa interest, what type (standard) of fitting is leaking? Theres not a simple 370 AN / 450 SAE / JIC mix up??

LOL.. english please??? :D

the fittings are all fine. mine leaked when i first installed it in the exact same place. just make sure you do everything up super tight! my kit is perfect and its all looking very mickey mouse! i think they are great... its not like they are actually that cheap anyway...

I took it to my mate at Turbotechnics and he is going to machine the fittings flat where the O ring goes and replace it with copper washers.

Appart from that the rest of the kit looks OK except for the really long long oil lines.

GeeTR Grand Master

GeeTR

Posted
Posted (edited)
Lol @ another leaking china kit :laugh:

GT - apart from the poorly made / designed block adapter, how do you find the cooler core itself? Does it look reasonable?

Outa interest, what type (standard) of fitting is leaking? Theres not a simple 370 AN / 450 SAE / JIC mix up??

LOL.. english please??? :P

I lol'd at you using a "china kit"

I asked you about the construction quality of the core.

I then suggested, that the fitting "standards" might have been mixed up, if you've swapped some of the couplers with your own; AN and JIC for example... its quiet a common mistake :D

Edited by GeeTR
Finchy33 Enthusiast

Finchy33

Posted
Posted (edited)
I then got hold of some locktight paste stuff (hydrolic thread sealant) which is suppossed to hold 1000psi once cured AND IT STILL LEAKS.

577? 542?

Use them everyday, if that didn't seal it there must be some inherent problem with the fittings!! (Which GeeTR is getting at)

Edited by Finchy33
Guilt-Toy Grand Master

Guilt-Toy

Posted
  • Author
Posted

the problem was that the o rings were not sealing properly.

Turbotechnics took the fittings off, got them machined flat so there is no groove where the O rings used to go and then used copper washers and a decent thread sealant.

took it for a 250km drive last night and it did not leak a drop!

Very happy about that now!

urtwhistle Proficient

urtwhistle

Posted
Posted

hmmm I used Loctite hydraulic thread sealer 569. but i never used the stock hoses as they were all too long and i didn't fit the cooler core. just don't do what i did and get new lines made up out of Dufield hydraulic hose. its just way to hard and not flexible enough. for in a engine bay.

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