Cam Seals & Intake Cam Gear (rb25)

[moobaque]

Hey all,

Currently halfway through doing a 100,000k service on my r33 gtst and in my kit from kudos was cam seals. Now i can only assume that these are seals that would be behind the cam gears but situated between the rocker cover and the head? If so i would think thats kind of an epic thing to do but anyway some help on that matter would be great as i can find zero information about people who have actually fitted these seals when i search.

My next query is realted to the intake cam gear. obviously there must be some moving parts to make its vvt side work but should the centre be filled with oil? started taking the little centre cover off to see how hard it was to remove the gear and oil started to leak out.

Any help would be much appreciated

Cheers

Camden

[Craved]

yes, that 4 bolt cover will contain oil

pretty sure that cam seal you get goes under the front retainer - see attachement

[maximajim]

As said it goes under the first cam bracket. Lube up the seal when you install it.

[moobaque]

Thanks for the replies Think i might leave the cam seals for now as i have no leaks.

Just out of curiosity can anyone explain how exactly this gear achieves its vvt. I'm assuming its just a set physical change somehow..maybe at a certain rpm but nothing electronically triggered?

Cheers

Camden

[maximajim]

Thanks for the replies Think i might leave the cam seals for now as i have no leaks.

Just out of curiosity can anyone explain how exactly this gear achieves its vvt. I'm assuming its just a set physical change somehow..maybe at a certain rpm but nothing electronically triggered?

Cheers

Camden

I'm not 100% but I beleive this is how it works:

At a given RPM the ecu commands the VTC solenoid open (electrical) allowing oil pressure to the cam gear and advancing the cam. The ECU commands the solenoid close at a higher rpm to cut off oil pressure and the gear returns to its original position with the aid of the spring.

Edited January 16, 2009 by maximajim