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Unread 07-28-2010, 01:39 PM   #1
Puinsai
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1987 YJ Wrangler 
 
Join Date: Oct 2008
Location: Alaska
Posts: 144
Cam swap?

Hey, So I'm thinking about swaping out cams in a the next couple weeks since It looks like I need a new timing chain, so i figured I can swap cams at the same time. So I have a few questions of course,

1. How long does it take or should it take?
2. Any special tools reqiered?
3. Recomendations on a good low torque high HP cam?
4. Special fluids (Beer) how much and what brand is best for this job?
5. Can it be done alone or will I need a friend to help?
6. Any good write-ups I should read before starting this job?
7. Is this a do able job for your average Joe who can turn a wrench?

So the cam I was looking at was the clifford performance cam, the reason why is it comes with just about everything...ie, new high lift sprins, retainers, hardend pushrods, cam and hydraulic lifters. And the cam itself sounds like what I'm looking for. Recently, like 6 moths ago I did the 4.0l head swap so I know my top end/valve train is good and while I was doing that I checked out the pistons and cylinder walls and they look good as well.

For those who have recomendations this is what I'm working with....
4.2l w/4.0 head swap
mc2100
nuttered
HEI
4:56 gearing running 33's but stepping up to 35's after the cam swap

Im thinking I should have enough power to turn 35's with that gearing and those engine mods to include the new cam. Ohhh btw, if anybody was wondering about drivability with 33's running 4:56 gearing I have to say that bottom end torque is good, very short gears, crappy highway drivability and MPG not so good. I hope this changes with the bigger tires and new cam (except the low end torque of course). Longer gears and better highway drivability/lower rpm's for better MPG would be nice without loosing that low end power. As always looking for suggestions and insight....

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87 YJ []IIIII[]
3.5in BDS, 1" daystar MM, Posi Lock, D-30 w/Tru-track, Stock D-35, 33x12.5x15's, 4:56, 4.0l head swap, AX15 Swap, HEI, Howell TBI. AA SYE, Tom Woods DS.
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Unread 07-28-2010, 01:51 PM   #2
pasinbuy
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1994 YJ Wrangler 
 
Join Date: Feb 2007
Location: florida
Posts: 3,843
1. How long does it take or should it take? ...............A day should do it.

2. Any special tools reqiered? .........................A gear puller for the timing gears, Advanced Auto will loan you the tool

3. Recomendations on a good low torque high HP cam? .......................Sorry

4. Special fluids (Beer) how much and what brand is best for this job? ..............When doing a job like this I never drink, I hate to make mistakes and drinking makes me so strong that I break things or make stupid mistakes and/or I mislay things.

5. Can it be done alone or will I need a friend to help? ............Do it yourself job.

6. Any good write-ups I should read before starting this job? ............... A manual is all that you need. Although before removing the timing chain match up the timing gear marks, then before installing match up your new timing gears to the old gears to be sure that the marks match.

7. Is this a do able job for your average Joe who can turn a wrench?.......... Yes

Have fun, I always lay out my parts as I remove them so that the install goes in the same order. Some people just throw them in a box, I don't.
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Unread 07-28-2010, 02:21 PM   #3
Puinsai
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1987 YJ Wrangler 
 
Join Date: Oct 2008
Location: Alaska
Posts: 144
Wow, hey thanks for the response. I'm assuming i have to remove the front grill and radiator, but will I have to pull the harmonic dampener and pully from the crankshaft? Or is there enough room to get the timing gear cover off? Also, I know I have to drop the oil pan since I'm almost possative I cant remove the lifters out through the head and the block using a magnet, I think on most 4.2l their mushroomed, correct me if i'm wrong.
Anyway, I have all the gaskets needed for the job and I am going to have to pull off my head while I'm at it, I know I have some coolant leakage from my head swap last year that needs to be looked at, I'm thinking through one or more of the water jackets that were JB welded. I'm going to talk to the guy at clifford performance and make sure I get the right length pushrods and cam for the job, 4.2l block with a 4.0l head. Also I need to ask him about cam bearings, I didnt see them listed with the kit.
Probably a good call on the no additional human fluid consumption....i'll wait till its done.

Does anybody have anything else though? I know I havnt addressed everything.

Hopefully when this is said and done I will be pleased with the results......I plan on taking a lot of pictures and possibly doing a write-up on it since I didnt see one in the FAQ.
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87 YJ []IIIII[]
3.5in BDS, 1" daystar MM, Posi Lock, D-30 w/Tru-track, Stock D-35, 33x12.5x15's, 4:56, 4.0l head swap, AX15 Swap, HEI, Howell TBI. AA SYE, Tom Woods DS.
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Unread 07-28-2010, 02:40 PM   #4
MLJeeper
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Join Date: Nov 2004
Location: Birmingham, Al.
Posts: 5,029
I would either buy new stamped steel rockers (factory) or roller rockers for it as well. You would be amazed how worn out the stock arms are and the wear will affect your performance.
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Your limited slip differential sucks.

Quote:
Originally Posted by Anticanman View Post
Any video of the sound?
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Unread 07-29-2010, 01:30 AM   #5
Puinsai
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1987 YJ Wrangler 
 
Join Date: Oct 2008
Location: Alaska
Posts: 144
I put in new rockers when I did the head swap about six months ago, I hope their not worn out already...
__________________
87 YJ []IIIII[]
3.5in BDS, 1" daystar MM, Posi Lock, D-30 w/Tru-track, Stock D-35, 33x12.5x15's, 4:56, 4.0l head swap, AX15 Swap, HEI, Howell TBI. AA SYE, Tom Woods DS.
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Unread 07-29-2010, 10:00 AM   #6
MJMPC
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If you are going to run 35s you should go to a better rearend like a 8.8.
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Unread 07-29-2010, 11:55 AM   #7
jsawduste
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2006 YJ Wrangler 
 
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The balancer needs to come off. As does the head.

Get a new timing chain set also.

Hesco is a sure bet for a cam and all the parts you need. Call and talk to Bennie. He will give you the straight scoop on which cam to run. My opinion is the RVOB model.
Hesco Inc. - High Performance Engine Service

Hesco knows more about the Jeep engine family then any other company. There products are not cheap but they are the best.
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Unread 07-29-2010, 01:35 PM   #8
MLJeeper
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Join Date: Nov 2004
Location: Birmingham, Al.
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Quote:
Originally Posted by Puinsai View Post
I put in new rockers when I did the head swap about six months ago, I hope their not worn out already...
What do the top of the valve stems look like. If there mangles then your new rockers are too. if nto you should be good to go with those.
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Your limited slip differential sucks.

Quote:
Originally Posted by Anticanman View Post
Any video of the sound?
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Unread 07-30-2010, 01:17 AM   #9
Puinsai
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1987 YJ Wrangler 
 
Join Date: Oct 2008
Location: Alaska
Posts: 144
Quote:
Originally Posted by MJMPC View Post
If you are going to run 35s you should go to a better rearend like a 8.8.
Yep...thats part of my summer makeover...=)
__________________
87 YJ []IIIII[]
3.5in BDS, 1" daystar MM, Posi Lock, D-30 w/Tru-track, Stock D-35, 33x12.5x15's, 4:56, 4.0l head swap, AX15 Swap, HEI, Howell TBI. AA SYE, Tom Woods DS.
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Unread 07-30-2010, 01:23 AM   #10
Puinsai
Registered User
1987 YJ Wrangler 
 
Join Date: Oct 2008
Location: Alaska
Posts: 144
Quote:
Originally Posted by jsawduste View Post
The balancer needs to come off. As does the head.

Get a new timing chain set also.

Hesco is a sure bet for a cam and all the parts you need. Call and talk to Bennie. He will give you the straight scoop on which cam to run. My opinion is the RVOB model.
Hesco Inc. - High Performance Engine Service

Hesco knows more about the Jeep engine family then any other company. There products are not cheap but they are the best.
Thanks, I'll check them out, I am going to get a new timing chain, thats the whole reason I'm getting into this to beging with. Figured it would be a perfect time to get a new cam, fix my head gasket leak, and oil pan/rear main all at the same time. Also putting in a rebuilt AX-15 and np231 t/c with an AA sye/ cv drive shaft and an 8.8 rear end. Dropping some serious $$ into it before winter hits, winter in Alaska is brutal.
__________________
87 YJ []IIIII[]
3.5in BDS, 1" daystar MM, Posi Lock, D-30 w/Tru-track, Stock D-35, 33x12.5x15's, 4:56, 4.0l head swap, AX15 Swap, HEI, Howell TBI. AA SYE, Tom Woods DS.
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