5.2 Harmonic Balancer doesn't fully seat - I'm about a belt rib off?? - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > 5.2 Harmonic Balancer doesn't fully seat - I'm about a belt rib off??

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Unread 07-31-2014, 11:07 PM   #1
MikeyM
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5.2 Harmonic Balancer doesn't fully seat - I'm about a belt rib off??

I swear this is frustrating. Like the title says I'm about 1 belt rib off on the serpentine. When installing the replacment balancer I got a couple grade 8 bolts, threaded them into the balancer and wedged my pry bar in between, cranked the balancer all the way down (or so I thought) and torqued to 135 lbs, installed the belt and lined it up on all pullies, started the engine and noticed the belt jumped a rib off at the crank pulley. So pulled the lower pulley, repeated the above and was able to get it to seat a tad more.. the problem is I really torqued on it to get it to move (past the 135 ft lbs.) until I started to get scared I was going to strip the threads in the crankshaft or break something. Plus the bolt was super hard to continue to turn, I didn't feel safe pulling on it further. I swear I need maybe less than 1/16" to get the serpentine belt to run true.

Any ideas on what I can do or did wrong? I checked a couple different places and they both showed the same PN for the balancer I got - Dayco PB1004N.

Thanks alot,
Mikey

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Unread 07-31-2014, 11:42 PM   #2
jm8881
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Quote:
Originally Posted by MikeyM View Post
Any ideas on what I can do or did wrong?
My guess is you're using the wrong tool. You need a harmonic balancer installer to seat the balancer correctly without stripping the threads or beating on it like a cave man. They can be rented from any auto parts place and returned for a full refund.
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Unread 08-01-2014, 04:41 AM   #3
firsttimeZJ13
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I just used the bolt to install mine twice lately. Didn't have any issues with them lining up at all.
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Unread 08-01-2014, 06:05 AM   #4
newfieZJ
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Do a side by side comparison to the old one . Never used a special tool for these yet . They are a tight fit , but not a press on , the crank bolt should pull it all the way in w/o issue . I did find the 5.2 tighter than the 5.9 , not sure why .
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Unread 08-01-2014, 07:28 AM   #5
KJK
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Quote:
Originally Posted by jm8881 View Post
My guess is you're using the wrong tool. You need a harmonic balancer installer to seat the balancer correctly without stripping the threads or beating on it like a cave man. They can be rented from any auto parts place and returned for a full refund.
This.

You need a harmonic balancer installer. It won't strip the crank threads.
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Unread 08-01-2014, 07:36 AM   #6
HighLonesome
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Originally Posted by firsttimeZJ13 View Post
I just used the bolt to install mine
x2
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Unread 08-01-2014, 07:55 AM   #7
McCloudsZJ
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Quote:
Originally Posted by firsttimeZJ13 View Post
I just used the bolt to install mine twice lately. Didn't have any issues with them lining up at all.
X3. I did have to use McCloud's patented "redneck enginuity cranky stabilitizer" to get it torqued properly without turning the crank.

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Unread 08-01-2014, 07:59 AM   #8
firsttimeZJ13
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Quote:
Originally Posted by McCloudsZJ

X3. I did have to use McCloud's patented "redneck enginuity cranky stabilitizer" to get it torqued properly without turning the crank.
I put the torque bar on and had it pried against the sway bar, pull the coil wire and turn the key a few times until the torque bar clicked. Sometimes you have to make the jeep work for you since you work for it so much! Haha!
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Unread 08-01-2014, 08:50 AM   #9
MikeyM
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Thanks for the replies, guys. Using the regular crank bolt I was able to pull it all the way down.. well almost. I suppose the resistance I am feeling with the stock bolt is because the installer would not be pulling on the crank threads as I am, rather on the rod threaded into the crank.
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Unread 08-01-2014, 05:29 PM   #10
MikeyM
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Update below.
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Unread 08-01-2014, 05:37 PM   #11
MikeyM
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Update: You were entirely correct. This job is finished and I feel slightly retarded. Especially after I watched this video:
. I should have known to use the right tool for the job especially after what I preach to everyone. At least I wasn't considering beating on it; I figured the thrust bearings would take a beating. It was hard enough getting the bolt back off since I almost destroyed it by using it as a press. The installer tool really is the way to go. One thing I did not remember from days past (looong past) is the acutal piece of the installer that sits against the balancer and bears the load is a bearinged unit so when you torque down on the nut to press the balancer on there's very little to no friction.. had it done in 10 mins. with very little effort. Didnt even need to block the engine until it came time for final torque.

So.. word of unsolicited advice even if you have used the bolt or different bolts - using the installer is the way to go; makes it MUCH easier.

Thanks for the help fellas.

Mikey.
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'98 ZJ 5.2L V8, full intake, exhaust, & ignition mods, Rusty's 4" coils with front TB conversion, rear ORGS TB, OME long travels & SS, Tera QDs, Yakima rack w/goodies, BFG 31" MT/KMs, full skids, front and rear diffy guards, Donavee rear swing-out tire carrier. 213k, 18-19 hwy.
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Unread 08-01-2014, 06:19 PM   #12
jm8881
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Glad you got it sorted out. The correct tool makes life that much easier.

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