Sr20 cam sprocket removal. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

idamaster · 11-12-2009, 09:01 PM

Been following that manual on sr20's up to this point. It says to use a socket on the sprocket and an open end wrench on the hexagon shaped thing on the cam. I dont see where this thing is. How do I remove the sprockets ?
http://i288.photobucket.com/albums/l...x/100_1254.jpg
http://i288.photobucket.com/albums/l...x/100_1255.jpg
http://i288.photobucket.com/albums/l...x/100_1256.jpg

Sileighty_85 · 11-12-2009, 09:10 PM

its DIRECTLY in front of the #1 cylinder cam lobe

you can do that or throw a breaker bar on the crank and hold it that way also.

idamaster · 11-12-2009, 09:21 PM

Quote:

Originally Posted by Sileighty_85

its DIRECTLY in front of the #1 cylinder cam lobe

you can do that or throw a breaker bar on the crank and hold it that way also.

Thanks, I thought that it was supposed to stick out like the lobe does. I cant fit my open end wrench in there because its too thick. About the whole breaker bar on the crank can I do that without the belt being tensioned?

Sileighty_85 · 11-12-2009, 09:30 PM

Quote:

Originally Posted by idamaster

Thanks, About the whole breaker bar on the crank can I do that without the belt being tensioned?

youp.......................

idamaster · 11-12-2009, 09:35 PM

Well that didnt work. The chain ended up jumping like 5 links.

jspaeth · 11-12-2009, 09:41 PM

Quote:

Originally Posted by Sileighty_85

its DIRECTLY in front of the #1 cylinder cam lobe

you can do that or throw a breaker bar on the crank and hold it that way also.

Ew.......doesn't that put an awful lot of stress on the timing chain?

I wouldn't do that, but then again I am paranoid.

*garagelu* · 11-12-2009, 09:52 PM

put a screwdriver through one of the holes of the sprocket to keep it from moving when you loosen the bolt.

Use your head people!!

Sileighty_85 · 11-12-2009, 10:37 PM

Quote:

Originally Posted by idamaster

Well that didnt work. The chain ended up jumping like 5 links.

lol i guess put the tensioner back in.

works for me ive done it 4 times already

idamaster · 11-12-2009, 10:52 PM

Ill try to see if an adjustable wrench will fit onto the cam tomorrow

fcdrifter20 · 11-12-2009, 11:07 PM

Quote:

Originally Posted by garagelu

put a screwdriver through one of the holes of the sprocket to keep it from moving when you loosen the bolt.

Use your head people!!

owww.

all u have to do is hold the hex realy realy good and dont let it move if ur using the breaker bar technique. so u gota put some real huevos into it,if u let it slip, it could mess things up. i have done this a couple times with out problems. but i usualy use an impact to pull it off wich is the easiest.

Sileighty_85 · 11-12-2009, 11:10 PM

Quote:

Originally Posted by idamaster

Ill try to see if an adjustable wrench will fit onto the cam tomorrow

a normal wrench wont fit it, You'll have to grind the wrench to fit unless you can find a Thin wrench to fit it

idamaster · 11-12-2009, 11:12 PM

Ill go buy an impact wrench. Ive always needed one anyways.

jspaeth · 11-13-2009, 08:43 AM

I took the sprockets off with the cams OUT of the car.

Wrap whole cam in towels, put it on workbench.

Adjustable box end wrench over hex portion (had one that BARELY squeezed in there)....make sure it is ON and fits snugly.

Breaker bar on the bolt.

You can do it with 1 person....rotate the cam so that the wrench wedges down against the workbench.

Helps to have a second person to hold the cam down and hold the wrench tho.

slow92 · 11-13-2009, 12:10 PM

impact wrench all the way with the transmission in gear so the crank won't move

jspaeth · 11-13-2009, 02:43 PM

Quote:

Originally Posted by slow92

impact wrench all the way with the transmission in gear so the crank won't move

You guys are crazy, or I am just a little bitch.

All of that torque is being put through the timing chain....and it is an impact tq, not a smooth tq.

I just don't like the idea of doing that, doesn't sit right with me.

*garagelu* · 11-13-2009, 08:10 PM

Quote:

Originally Posted by jspaeth

You guys are crazy, or I am just a little bitch.

All of that torque is being put through the timing chain....and it is an impact tq, not a smooth tq.

I just don't like the idea of doing that, doesn't sit right with me.

Yea I totally agree that you are being a bitch about it.

COME ON, you arn't going to be sitting there for an hour with the impact hammering away at it. It should take more than a second or two to break it loose with the impact.

I can't believe there is a thread about how to break a bolt loose.

Throw a screwdriver in the sprocket hole to keep it from moving and break it loose.

OR

if you have an impact, put it in 5th gear and break it loose.

I really hope you have the bolt out by now....if not, thats sad.

*Ceepo* · 11-14-2009, 01:27 AM

wow, this is retarded, take your wrench grind it down so its not as thick and break that bitch loose, not hard at all dude!!!

aNskY · 11-15-2009, 07:08 PM

i have always used a impact... even with no trans/ nothing holding crank pulley.. a quick zip breaks 'em free...

idamaster · 11-15-2009, 09:21 PM

Quote:

Originally Posted by aNskY

i have always used a impact... even with no trans/ nothing holding crank pulley.. a quick zip breaks 'em free...

Exactly what I did. I held the breaker bar on the crank tight but the impact wrench didnt move it.

*garagelu* · 11-15-2009, 09:24 PM

Quote:

Originally Posted by idamaster

Exactly what I did. I held the breaker bar on the crank tight but the impact wrench didnt move it.

What kind of impact gun are you using? Turn up the air pressure or get a impact that can handle more torque.

There should be no reason why an impact can't get that off.

idamaster · 11-15-2009, 09:45 PM

Quote:

Originally Posted by garagelu

What kind of impact gun are you using? Turn up the air pressure or get a impact that can handle more torque.

There should be no reason why an impact can't get that off.

I meant the impact gun didnt make the crank move. The sprocket was taken off in a millisecond haha

djcobra · 11-15-2009, 09:51 PM

WTF! take off the rocker arm stoppers and you should be able to place the hexagon wrench on the camshaft nicely (I think its either 25mm or 26mm I forget), and use a break-bar on the front of the sprocket (26mm or 27mm I believe, don't quote me on it). Never use the chain for tension, geez!

Steve.

Sileighty_85 · 11-15-2009, 10:09 PM

Quote:

Originally Posted by djcobra

WTF! take off the rocker arm stoppers and you should be able to place the hexagon wrench on the camshaft nicely (I think its either 25mm or 26mm I forget), and use a break-bar on the front of the sprocket (26mm or 27mm I believe, don't quote me on it). Never use the chain for tension, geez!

Steve.

Normal wrenches are too fat

You need to either get find a thin made one or grind one to fit

jspaeth · 11-16-2009, 08:06 AM

I had an adjustable wrench that I used and it BARELY fit on there.....

Then, I used on my HKS cams to put the sprockets back on, and it fit on those no problem.

11-12-2009, 09:10 PM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Wishing Back in Okinawa -_- Posts: 2,508 Trader Rating: (0)	its DIRECTLY in front of the #1 cylinder cam lobe you can do that or throw a breaker bar on the crank and hold it that way also. __________________ 後輪駆動車１番 1991 Built SR GT2871R -363whp 1998 S14 W/RB25- Rebuild in Progress

11-13-2009, 08:43 AM	#13
jspaeth Zilvia FREAK! Join Date: Mar 2006 Location: South Jersey Age: 25 Posts: 1,586 Trader Rating: (0) Rides Gallery: jspaeth	I took the sprockets off with the cams OUT of the car. Wrap whole cam in towels, put it on workbench. Adjustable box end wrench over hex portion (had one that BARELY squeezed in there)....make sure it is ON and fits snugly. Breaker bar on the bolt. You can do it with 1 person....rotate the cam so that the wrench wedges down against the workbench. Helps to have a second person to hold the cam down and hold the wrench tho. __________________ WTB: Clean, uncracked black S14 dashboard

11-13-2009, 12:10 PM	#14
slow92 Leaky Injector Join Date: Jun 2008 Location: SAVANNAH Posts: 70 Trader Rating: (0)	impact wrench all the way with the transmission in gear so the crank won't move __________________ S13 Coupe SR20 400whp

11-14-2009, 01:27 AM	#17
Ceepo Premium Member Join Date: Jan 2008 Location: Cedar City, Utah Posts: 1,662 Trader Rating: (6) Rides Gallery: Ceepo	wow, this is retarded, take your wrench grind it down so its not as thick and break that bitch loose, not hard at all dude!!! __________________ 1995 240sx SE (current)

11-15-2009, 07:08 PM	#18
aNskY Zilvia FREAK! Join Date: Apr 2005 Location: NY Age: 25 Posts: 1,504 Trader Rating: (8)	i have always used a impact... even with no trans/ nothing holding crank pulley.. a quick zip breaks 'em free... __________________ 2010 Nissan Frontier 4x4 V6 King Cab 1990 Nissan 240sx 50 Trim SR20DET

11-12-2009, 09:01 PM	#1
idamaster Leaky Injector Join Date: Oct 2009 Location: LA Posts: 93 Trader Rating: (1)	Sr20 cam sprocket removal. Been following that manual on sr20's up to this point. It says to use a socket on the sprocket and an open end wrench on the hexagon shaped thing on the cam. I dont see where this thing is. How do I remove the sprockets ? http://i288.photobucket.com/albums/l...x/100_1254.jpg http://i288.photobucket.com/albums/l...x/100_1255.jpg http://i288.photobucket.com/albums/l...x/100_1256.jpg

11-12-2009, 09:35 PM	#5
idamaster Leaky Injector Join Date: Oct 2009 Location: LA Posts: 93 Trader Rating: (1)	Well that didnt work. The chain ended up jumping like 5 links.

11-12-2009, 09:52 PM	#7
garagelu Premium Member Join Date: Aug 2005 Location: Birmingham, AL Age: 24 Posts: 1,101 Trader Rating: (23)	put a screwdriver through one of the holes of the sprocket to keep it from moving when you loosen the bolt. Use your head people!!

11-12-2009, 10:52 PM	#9
idamaster Leaky Injector Join Date: Oct 2009 Location: LA Posts: 93 Trader Rating: (1)	Ill try to see if an adjustable wrench will fit onto the cam tomorrow

11-12-2009, 11:12 PM	#12
idamaster Leaky Injector Join Date: Oct 2009 Location: LA Posts: 93 Trader Rating: (1)	Ill go buy an impact wrench. Ive always needed one anyways.

11-15-2009, 09:51 PM	#22
djcobra Zilvia Member Join Date: Aug 2006 Location: Calgary Age: 31 Posts: 261 Trader Rating: (1)	WTF! take off the rocker arm stoppers and you should be able to place the hexagon wrench on the camshaft nicely (I think its either 25mm or 26mm I forget), and use a break-bar on the front of the sprocket (26mm or 27mm I believe, don't quote me on it). Never use the chain for tension, geez! Steve. __________________ S14 326 whp, 311 tq @ 15 psi HKS F-CON V-PRO

11-16-2009, 08:06 AM	#24
jspaeth Zilvia FREAK! Join Date: Mar 2006 Location: South Jersey Age: 25 Posts: 1,586 Trader Rating: (0) Rides Gallery: jspaeth	I had an adjustable wrench that I used and it BARELY fit on there..... Then, I used on my HKS cams to put the sprockets back on, and it fit on those no problem. __________________ WTB: Clean, uncracked black S14 dashboard

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