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Tips While Installing Cams + Valve Springs

Tomei_33

By Tomei_33,
in Engines & Forced Induction

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Tomei_33 Rising Star

Tomei_33

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Hey guys,

I'm gonna be getting new HKS cams put in soon along with HKS valve springs and retainers. Is there anything that i should do while the head is off? maybe solid lifters? or changing gaskets? Im aiming for around 350 awkw.. any help is appreciated. Thanks

btw this is on a 1990 R32 gtr thanks~!

PM-R33 Grand Master

PM-R33

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If the head is off its probably worth getting it chemically cleaned in a bath just to get rid of all the carbon build up, its pretty cheap anyway. Depends how far you wanna go with modifying the head and the specs of the cams your putting in i suppose. Obviously a new head gasket is needed.

I'm kind of in a similar boat to you at the moment, changing my cams in a couple of weeks.

tacker Mentor

tacker

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yer matie gtr's are a solid system, cam directly on to bucket, onto shim onto valve stem.

You could look at an oil restrictor which is put into the block to reduct the amount of oil pushed up into the head its a 5 minute job.

I have seen 3 different head in the past few weeks and all the valve guides were worn. If the valve are out you could do some porting but dont ask me how as i stuffed a head by taking to much out :-) well documented but did get the second one right

Tomei_33 Rising Star

Tomei_33

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exhaust valve guides are probably flogged out and will need replacing.

solid lifters...GTR...lol

Thanks for the info, but could u elaborate on the "solid lifter...GTR ... lol"

Im not sure what thats meant to mean lol - I read that gtrs should only change lifters if the lift is 10.25mm or above? the cams are 10.2 lift, so i wouldnt need to change the lifters would i?

Also are there other gaskets that i should change? a workshop recommended that i change rocker cover gaskets too..

tacker Mentor

tacker

Posted
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gtrs are a solid lifter type system mate so dont worry about them.

10.2 mm lift will be an issue though i believe you will need to machine the head where the cam lobes rotate i think that 10.2 will touch.

Also i you may need valve springs to match the 10.2mm lift again not sure if the standard springs will cope with that lift.

think you better talk to a workshop who has done this before as you will need to check valve clearence and this can be a difficult job at the best of times.

Tomei_33 Rising Star

Tomei_33

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gtrs are a solid lifter type system mate so dont worry about them.

10.2 mm lift will be an issue though i believe you will need to machine the head where the cam lobes rotate i think that 10.2 will touch.

Also i you may need valve springs to match the 10.2mm lift again not sure if the standard springs will cope with that lift.

think you better talk to a workshop who has done this before as you will need to check valve clearence and this can be a difficult job at the best of times.

The person i got the cams off told me that they are straight fit cams, no modification required. I think i mentioned that i got valve springs, not sure if i did, but yea i got sum :P and i spoke to a workshop about it, they said a few shims will have to be swapped around and some bought, but that wont be too much trouble.. Just wanna make sure that i dont have to take the head off again.. So what gaskets should be changed will the head is off? obviously the head gasket, but any others?

rb26s13 Mentor

rb26s13

Posted
Posted (edited)
The person i got the cams off told me that they are straight fit cams, no modification required. I think i mentioned that i got valve springs, not sure if i did, but yea i got sum >_< and i spoke to a workshop about it, they said a few shims will have to be swapped around and some bought, but that wont be too much trouble.. Just wanna make sure that i dont have to take the head off again.. So what gaskets should be changed will the head is off? obviously the head gasket, but any others?

you got had.

the only bolt in cams i can think of that require nothing else to be done is pon cams

Edited by rb26s13
Tomei_33 Rising Star

Tomei_33

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hrm... does anyone know how much the standard nissan valve guides should cost? i gave them a call and they quoted me $47.45 EACH... times 24, thats $1138.80... which is ridiculous when tomei valve guides on ebay are only $525 + postage..

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