Harmonic Balancer Keeps Getting Loose......

[ct-gtr32]

Can anyone help me!!

I've got a GTR32 and having problems with the harmonic balancer, I've gotten it tighten twice, but it keeps getting loose after a few days. It's been tighten by hand using a wrench. Is there a special tool needed to tighten it?

Has anyone had this problem before, and how do I fix it??

Chris

[Zilch*]

Mate what size wrench are we talking?

A mechanic friend of mine did mine in front of me, used a foot long breaker bar and then slotted on a 3 foot section of pipe for some extra leverage while I jammed the gearing with a screwdriver, needs to be real bloody tight!!

Other than, it's unlikely but the thread on the bolt might not be the best

[Xmetal]

Try putting some Loctite on the thread before screwing the nut back on that secures the balancer.

[Stinky Rooster]

Dude, I don't want to put the wind up you here, but the problem you are having is the best way to completely destroy the bottom end of an engine I know of.

Firstly, loctite +11ty (although it will be a bolt, not a nut) Keep in mind that the thread you run the bolt into is actually the nose of the crankshaft so be vewy vewy careful of the condition of the thread on the bolt - it is a grade 8.8 high tension jobbie that can mess up the internal thread on the crank nose if you aren't careful.

Secondly, have a really close look at the thick washer behind the head of the bolt as you are running it in and make sure it is locating properly, I have seen this happen before where the washer was sitting up on a ledge and when the bolt felt tight, it was actually deforming the washer.

Lastly, I always use a rattle gun when I am tightening a harmonic balancer, apart from the fact that you don't have to risk chipping cam gears etc when you are trying to stop the engine from turning over, impacting it tight will hep the loctite cure properly.

Oh, and obviously make sure the key and keyway are in good condition and the rubber ring is not showing any sign of wear as this will lead to increased harshness and vibration.

[petrolfix]

i had a similar problem with a comodore. cut a long story short the harmonic balncer had a hit bent the crank a little kept killing the harmonic balncers and threw belts all the time. as the engine runs the bolt should tighten not undo so use the corect socket and a breaker bar(or you could actually look up the correct torque setting and use a tension wrench). as stinky roster said make shure your washer and bolt in good condition as well as the crank and harmonic balancer. under no circumstance whould i be using any loctite. if you use one that stands the heat you will never get it undone.