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Changing Cam Gears On A Gtr

sinistaGTR

By sinistaGTR,
in Engines & Forced Induction

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smithy85 Community Regular

smithy85

Posted
Posted

You will need to remove:

radiator

fan and belts

cam angle sensor

top timing cover

crank pulley and then

lower timing cover

timing belt

Its best to get the timing marks all lined up before you take the timing belt off, so then you can just 'one for one' each cam gear without changing any of the marks. Then its just a reverse process to put it all back together.

There should already be a bit of info on this, just search. Also the manual sets it out fairly straight forward.

sinistaGTR Grand Master

sinistaGTR

Posted
  • Author
Posted

You will need to remove:

radiator

fan and belts

cam angle sensor

top timing cover

crank pulley and then

lower timing cover

timing belt

Its best to get the timing marks all lined up before you take the timing belt off, so then you can just 'one for one' each cam gear without changing any of the marks. Then its just a reverse process to put it all back together.

There should already be a bit of info on this, just search. Also the manual sets it out fairly straight forward.

cheers for that,

yeh searching cam gears or timing belt etc etc in here and trying to find exactly what your after, is like searching for a needle in a haystack

djr81 Grand Master

djr81

Posted
Posted

You will need to remove:

radiator

fan and belts

cam angle sensor

top timing cover

crank pulley and then

lower timing cover

timing belt

Its best to get the timing marks all lined up before you take the timing belt off, so then you can just 'one for one' each cam gear without changing any of the marks. Then its just a reverse process to put it all back together.

There should already be a bit of info on this, just search. Also the manual sets it out fairly straight forward.

Yeah all of that except the fan and radiator.

GTRsean Grand Master

GTRsean

Posted
Posted

That's what I was going to say!

Do the water pump, belt, idler and tensioner bearings, front seal, cam seals and the bolt and stud....unless you just did a major service less than 20,000km ago!

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted (edited)

you might get away with the radiator in but fan definately has to come out. and if your balancer hasnt been off in a while and you need to use a puller than the radiator will probs have to come out.

Edited by JonnoHR31
smithy85 Community Regular

smithy85

Posted
Posted

you might get away with the radiator in but fan definately has to come out. and if your balancer hasnt been off in a while and you need to use a puller than the radiator will probs have to come out.

Mine was uber tight and ended up needing a massive claw puller to get it off, but because the puller was so long, I had to remove the A/C condenser as well HAHA!

blue_vl_t Rising Star

blue_vl_t

Posted
Posted

You can just swap the gears over with the front cover off, without removing the timing belt completely. Have the engine at tdc and swap one at a time, they are a bit tight to get on and off, but definatly heaps less stuffing about.

If your worried about the balancer tdc mark being correct, only a matter of checking no1 piston tdc through the spark plug hole.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Yeh I think the cam gears can wait for another 30000kms or so (My car only has 55000kms on it)

Are you sure they are legit? :D

Cam gears for their price as one of the best mods you can do really.

Certainly no harm in doing a big service like that early, lots of people do it around 80,000 - some just do it soon as it comes off the boat :)

djr81 Grand Master

djr81

Posted
Posted (edited)

if u can remove a harmonic balancer without removing fan and radiator i really want to know how :D :D

Why do you want to remove the harmonic balancer to replace the cam gears?

He said gears and that was all he asked about. Other stuff is a different story and yes fan & radiator out but if he only wants the cam gears done he doesnt need to dismantle half the engine.

Edited by djr81
KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

You can just swap the gears over with the front cover off, without removing the timing belt completely. Have the engine at tdc and swap one at a time, they are a bit tight to get on and off, but definatly heaps less stuffing about.

If your worried about the balancer tdc mark being correct, only a matter of checking no1 piston tdc through the spark plug hole.

I've done it that way on an RB25DET - not too hard.

If you want to go the whole hog here is a tutorial:

http://www.skylinesaustralia.com/forums/topic/73824-adj-camshaft-pulley-new-cam-belt/

endless Proficient

endless

Posted
Posted (edited)

You can just swap the gears over with the front cover off, without removing the timing belt completely. Have the engine at tdc and swap one at a time, they are a bit tight to get on and off, but definatly heaps less stuffing about.

If your worried about the balancer tdc mark being correct, only a matter of checking no1 piston tdc through the spark plug hole.

I am very surprised to find this method is possible, i've been delaying doing the job as have recently done a 100k service but didn't think to put cam gears in (doh!)

Also I agree with the comment above about the belt tension.. off tension the belt is still a biarch to get on.. hmm

Edited by endless
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Yeh they are met I have the full history of the car, the previous owner used it as a weekend only car racking up about 7000kms in 5 years with full service history

Ok ye cool - fair enough to wait, although depends how many km's you do in a year, you might be waiting a while :D

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