Blown head gasket ?

[Shaun90]

Blown head gasket ?

Hey guys n gals, so I've just purchased my first non holden car at the ripe age of 27...got a r33 turbo has a few decent mods ..exhaust, coilovers turbo timer, fmic few other bits n peices, ran perfectly fine but noticed the oil is milky so it's time to remove the head n replace the gasket n timing belt... any tips n tricks that can be thrown my way would be muchly appreciated I've done many head gaskets before jus never worked on a skyline before, only Rv motor I've touched was my old vl Calais turbo I had about 6 yrs ago...cheers 

[Shaun90]

I meant Rb motor....also have noticed it has arp head studs in it those are re-usable to my knowledge can anyone elaborate? Is this correct or do I need to buy new ones? 

Cheers 

[admS15]

Yes ARP studs are reusable. Rb's have a water/oil heat exchanger located bellow the oil filter. Sometimes these can fail and allow water into the oil system. Just thinking out loud and something you could check before you go ripping the head off.

[Shaun90]

Thank you for the reply mate I didn't kno that......any idea on a price to replace that? The radiator had pressure aswell wasn't bubbling jus popped when removing the cap not sure if it's normal for this motor and or turbo motors..

 

cheers 

[Scott Black]

Was the motor warm, as the radiator will pressurise normally. Idealy I'd do a compression test. Tk test, and if there both ok then I'd just pull the water lines off the heat exchanger, loop them together and get the rb30 oil filter stud and remove the heat exchanger all together

[Shaun90]

Yes the motor was warm....tk test? As in the gases in radiator?...thanx for the advise guys it's muchly appreciated

[admS15]

Yep what Scott black said

[Shaun90]

Wat do u mean by a tk test? 

[Scott Black]

http://wbtools.com.au/products/automotive-equipment/tee-kay-head-check-combustion-leak-detector/ is a tk test, basically you use the pump on it to Pump some air off the top of the radiator and if the fluid the air goes threw changes colour it means there's combustion gases in the cooling system, with the most likley cause being a blown head gasket. However if you have oil and water mixing with a negative tk test and even compression it's most likly not from a blown head gasket

[Shaun90]

Ahk lol yea I get what u mean I've done it to a few cars before jus never heard of it being called a tk test lol in saying that I've been away from cars for a fair few yrs due to loss of license ..only got it back like a month ago...thanx for the help mate..pretty sure I have one of those test kits laying around my shed somewhere..lent my compression tester out n never saw it again so I'll invest in a new one of those aswell, I'm doubting it being blown head gasket only bcoz of how good the car ran most seem to struggle under load etc that I've dealt with anyhow..hoping it's that heat exchanger thing I've got the timing belt off but I'll put it back together n get rid of the heat exchanger n c how it goes after tests.

 

so I'll need to run a rb30 oil filter with this adaptor once I remove the heat exchange? 

[Scott Black]

When you unbolt the heat exchanger you will see a metal fitting in the block. If you unscrew it a rb30 stud screws in, can be bought from Nissan for like $10 then a oil filter will screw straight to.the block. However it's best to use a z418 with an internal bypass valve after that as the z145 doesn't have the internal bypass as it's built into the heat exchanger

[Shaun90]

K so i put it all back together today filled radiator with jus water it started perfectly fine and nothing out of the ordonary drove it out the back yard n reversed it back to the carport area... opened up the radiator cap and it had heaps of pressure in t and really frothy.... turned it straight off n dropped a few F bombs lol head gasket is deffs gone the exhaust had shit coming out clear fluid no smoke that i could see... already priced head gasket n gates racing belt kit through kudos motorsport ill jus have to bite the bullet n do it 

[Scott Black]

Yeah if it's getting stupid amounts of pressure from one minute running when dead cold then it's f**ked. Sorry to hear

[Shaun90]

Yea owell shit happens lol it wasnt very hot had the thermos running from the moment i started it as they run of a toggle switch...and it pushed out a heap of frothy water when i took the cap off n was a decent amount of pressure behind it...its a shame but at leaste i kno what the issue is and i can fix it all myself...

thanx a bunch for the input guys look forward to being part of the skyline community ??