RB25det adjustable cam gears?? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dakemprb25 · 01-07-2014, 04:22 PM

So what ive come to understand, you can just take another stock exhaust cam form the rb25, use it on the intake side of the head to accommodate for adj. cam gears?

I have it all together on the engine now but im not sure what caps to use???
the exhaust caps or the intake caps...

I don't know if this has been cover but i haven't found anything real direct.

Any advice would be greatly appreciated

Dakemprb25 · 01-07-2014, 08:01 PM

Anyone?????

Dakemprb25 · 01-08-2014, 10:06 PM

so if my information is wrong would some one say so or point me where i would find someone who?

supersayianjim · 01-09-2014, 07:19 AM

ive never heard of this myself. but if you look on gtrcanada you would find someone who knows for sure. but keep me posted on the info you received.

Dakemprb25 · 01-09-2014, 09:32 AM

Will do thanks for the reply I thought I was alone on this boat

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zerodameaon · 01-09-2014, 10:48 PM

Unless anything has changed in the last few years you used to be able to use any RB series cam gear set, both intake and exhaust. The only thing is you lose the variable stuff because you have to buy a non NVCS cam set, which all the aftermarket cams are for the most part. Its kinda pointless to do adjustable timing gears without better cams.

Or track this down.
GReddy 13523306 13523306 Adjustable Camshaft Gear Sprocket RB25DET

Dakemprb25 · 01-10-2014, 11:49 AM

So what caps do I use? Cuz now the cam won't even move so I'm pretty sure I used the wrong ones and fucked it up...

And I'm not looking threw another entire forum for this answer. If it doesn't work I'm selling everything cuz I'm fed up with all the stress

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zerodameaon · 01-10-2014, 12:26 PM

For stock cams you use the stock caps, for aftermarket cams you use whatever they specify. If you are trying to use an exhaust cam in the intake side and running into issues you should just go back to the stock intake cam until you get a aftermarket set. I have yet to see someone do a cam swap like you are trying on the RB25, if you want to continue down that path you may very well be the first to do so.

Dakemprb25 · 01-10-2014, 01:22 PM

Well yes I have another exhaust cam on the intake side .... so what would I use.... the intake caps or the exhaust caps.... Cuz now its on the intake side..... yet its an exhaust cam.. just need some feedback on that...

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zerodameaon · 01-10-2014, 01:37 PM

Soo I just realized you were talking about the caps for the bearings, IDK why but I was thinking you were talking about the lifter caps. Use the caps that go on that head in the exact order you pulled them off. You should not be swapping them around randomly. I would swap back in all the intake stuff and make sure it spins freely, than if it does swap in just the exhaust cam and leave the caps where they should go based on where you pulled them off and tighten per the FSM.

Dakemprb25 · 01-10-2014, 01:47 PM

When I find time I'll try and let you know .... thanks for the replies

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Dakemprb25 · 01-11-2014, 12:33 PM

So I put all the original hardware back on and the cam still won't spin. I'm gonna talk to a shop here in town sometime this week and see if I'm fucked or not.

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*fliprayzin240sx* · 01-11-2014, 01:15 PM

Did you put the engine in TDC before you took anything off? And when you put everything back on, did you line the cams up close to where the timing marks are supposed to be? If you didnt, shit could be off and valves are sitting on your pistons.

Dakemprb25 · 01-11-2014, 01:22 PM

I have a FSM for the engine it was all don't to spec. The only reason I can think its stuck is because they don't have bearings in the caps. The cap serves as the bearing so I think somehow they got warped and now it all needs to be fitted again.... but I'm not sure

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*fliprayzin240sx* · 01-11-2014, 01:31 PM

Did you torque them down per FSM sequence? Double checked to make sure the tranny isnt in gear?

Dakemprb25 · 01-11-2014, 01:40 PM

Yes it was all done to FSM spec. The timing belt isn't on it yet....
What would the tranny have to so with it?

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*fliprayzin240sx* · 01-11-2014, 01:51 PM

Quote:

Originally Posted by Dakemprb25

Yes it was all done to FSM spec. The timing belt isn't on it yet....
What would the tranny have to so with it?

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I assumed you had everything back on and you were trying to turn the engine via the crank to check for binding. That would be the only way I would check to see if the cams are stuck or not. Would hate to spin one cam and have the valve tap the bottom end.

Dakemprb25 · 01-11-2014, 01:57 PM

You can turn the cams with a wench via the hex on #1 cyl. And all you need to check is if it is free...2-3 degrees at most .... it won't move at all... yet the exhaust side moves very easily with the wench... (2° at most ) and there both torqued the same....

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Dakemprb25 · 01-13-2014, 09:46 PM

So i pulled the cam back out and inspected all the journals. #6 & #7 had alum. burrs from g** knows in them, there fine just alitte scuffed. i cleaned it all up (swapped the new exhaust cam in)and re lubed everything and its all working properly.

Darius · 01-17-2014, 02:25 PM

To answer your question, there are 3 ways to go about adjusting the intake cam gear:

1) Degree the intake cam to see how much it needs to be adjusted. Remove the cam gear and you'll see on the back side of it 3 bolts that can be loosened and the gear can rotate independent from the VCT part. There are no markings you're basically guessing at your adjustment.

2) You can eliminate the VCT by blocking off the oil feed on the front of the block and run a standard adjustable cam gear.

3) Greddy makes an adjustable cam gear ring that goes over the top of the VCT part on the intake cam. I can't find it on the internet right now but I know it exists. I degreed my intake cam and found it to be dead on so I didn't need to buy an adjustable gear.

AND DO NOT DO ANYTHING WITH YOUR CAMS WHILE YOUR PISTONS ARE AT TDC! Always back the pistons down into the bores a few degrees, install the cams, line them up with the rear timing cover, THEN rotate the pistons up to TDC. The FSM procedure is risky because it assumes the cams go on at exactly a 15* angle or whatever. Screw that. They never lay just right when you initially set them in the caps.

Dakemprb25 · 01-17-2014, 02:54 PM

EXACTLYYY!! Exactly what I was looking for thanks a million man! I'm glad someone could finally be direct about it!

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dominion69 · 04-15-2015, 10:51 AM

hi so did the exhaust cam work on the intake side????

01-09-2014, 07:19 AM	#4
supersayianjim Nissanaholic! Join Date: Jan 2010 Location: location X Posts: 1,807 Trader Rating: (10) Feedback Score: 10 reviews	ive never heard of this myself. but if you look on gtrcanada you would find someone who knows for sure. but keep me posted on the info you received. __________________ http://www.240sxforums.com/forums/rb...ject-s-rb.html

01-11-2014, 01:15 PM	#13
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Did you put the engine in TDC before you took anything off? And when you put everything back on, did you line the cams up close to where the timing marks are supposed to be? If you didnt, shit could be off and valves are sitting on your pistons. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

01-11-2014, 01:31 PM	#15
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Did you torque them down per FSM sequence? Double checked to make sure the tranny isnt in gear? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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01-07-2014, 04:22 PM	#1
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	RB25det adjustable cam gears?? So what ive come to understand, you can just take another stock exhaust cam form the rb25, use it on the intake side of the head to accommodate for adj. cam gears? I have it all together on the engine now but im not sure what caps to use??? the exhaust caps or the intake caps... I don't know if this has been cover but i haven't found anything real direct. Any advice would be greatly appreciated

01-07-2014, 08:01 PM	#2
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Anyone?????

01-08-2014, 10:06 PM	#3
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	so if my information is wrong would some one say so or point me where i would find someone who?

01-09-2014, 09:32 AM	#5
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Will do thanks for the reply I thought I was alone on this boat Sent from my DROID RAZR using Tapatalk

01-10-2014, 11:49 AM	#7
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	So what caps do I use? Cuz now the cam won't even move so I'm pretty sure I used the wrong ones and fucked it up... And I'm not looking threw another entire forum for this answer. If it doesn't work I'm selling everything cuz I'm fed up with all the stress Sent from my DROID RAZR using Tapatalk

01-10-2014, 01:22 PM	#9
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Well yes I have another exhaust cam on the intake side .... so what would I use.... the intake caps or the exhaust caps.... Cuz now its on the intake side..... yet its an exhaust cam.. just need some feedback on that... Sent from my DROID RAZR using Tapatalk

01-10-2014, 01:47 PM	#11
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	When I find time I'll try and let you know .... thanks for the replies Sent from my DROID RAZR using Tapatalk

01-11-2014, 12:33 PM	#12
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	So I put all the original hardware back on and the cam still won't spin. I'm gonna talk to a shop here in town sometime this week and see if I'm fucked or not. Sent from my DROID RAZR using Tapatalk

01-11-2014, 01:22 PM	#14
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	I have a FSM for the engine it was all don't to spec. The only reason I can think its stuck is because they don't have bearings in the caps. The cap serves as the bearing so I think somehow they got warped and now it all needs to be fitted again.... but I'm not sure Sent from my DROID RAZR using Tapatalk

01-11-2014, 01:40 PM	#16
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Yes it was all done to FSM spec. The timing belt isn't on it yet.... What would the tranny have to so with it? Sent from my DROID RAZR using Tapatalk

01-11-2014, 01:57 PM	#18
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	You can turn the cams with a wench via the hex on #1 cyl. And all you need to check is if it is free...2-3 degrees at most .... it won't move at all... yet the exhaust side moves very easily with the wench... (2° at most ) and there both torqued the same.... Sent from my DROID RAZR using Tapatalk

01-13-2014, 09:46 PM	#19
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	So i pulled the cam back out and inspected all the journals. #6 & #7 had alum. burrs from g** knows in them, there fine just alitte scuffed. i cleaned it all up (swapped the new exhaust cam in)and re lubed everything and its all working properly.

01-17-2014, 02:25 PM	#20
Darius Zilvia Junkie Join Date: Mar 2005 Location: Chicago Posts: 346 Trader Rating: (5) Feedback Score: 5 reviews	To answer your question, there are 3 ways to go about adjusting the intake cam gear: 1) Degree the intake cam to see how much it needs to be adjusted. Remove the cam gear and you'll see on the back side of it 3 bolts that can be loosened and the gear can rotate independent from the VCT part. There are no markings you're basically guessing at your adjustment. 2) You can eliminate the VCT by blocking off the oil feed on the front of the block and run a standard adjustable cam gear. 3) Greddy makes an adjustable cam gear ring that goes over the top of the VCT part on the intake cam. I can't find it on the internet right now but I know it exists. I degreed my intake cam and found it to be dead on so I didn't need to buy an adjustable gear. AND DO NOT DO ANYTHING WITH YOUR CAMS WHILE YOUR PISTONS ARE AT TDC! Always back the pistons down into the bores a few degrees, install the cams, line them up with the rear timing cover, THEN rotate the pistons up to TDC. The FSM procedure is risky because it assumes the cams go on at exactly a 15* angle or whatever. Screw that. They never lay just right when you initially set them in the caps.

01-17-2014, 02:54 PM	#21
Dakemprb25 Join Date: Nov 2013 Location: ABQ. NM Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	EXACTLYYY!! Exactly what I was looking for thanks a million man! I'm glad someone could finally be direct about it! Sent from my DROID RAZR using Tapatalk

04-15-2015, 10:51 AM	#22
dominion69 Join Date: Apr 2015 Location: namibia Age: 31 Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	hi so did the exhaust cam work on the intake side????