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Crank Timing Belt Plate Question..

Paulusc44

By Paulusc44,
in Engines & Forced Induction

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Paulusc44 Enthusiast

Paulusc44

Posted
Posted

Heya guys,

Ive just completed HG, slipping my timing belt on.. Last time I did a timing belt on an RB I could hear a very faint noise coming from the harmonic balancer area, on closer inspection I can see that the very final timing belt plate actually gets pushed from back and loose the key-way at its most rear-ward position (where it wants to sit with timing belt on) this means it is free to rotate? Although it has a key-way hole cut into it? Why? it doesent naturally want to sit in the key-way?

My only guess is perhaps I needed to put a little more torque on the crank bolt?

Help haha

Cheers again

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Shoota_77 Veteran

Shoota_77

Posted
Posted

The "woodruff key" hasn't sheared off has it? Wouldn't be the first time. There are two, one for the cam pulley one for the balancer. Obviously the engine still runs so it's not entirely sheared off. But then again the belt gear can weld itself to the shaft sometimes so will still turn the belt/cam without the key.

Definitely make sure the balancer is correctly torqued up. Number one way to destroy your oil pump if it's not.

jiffo Mentor

jiffo

Posted
Posted

The slot in the rear belt guide plate is there so you can easily fit the plate without having to remove the woodruff keys.

Once in position it's way behind any key.

But it's not going to slip/rotate or whatever on the crank.

The balancer bolt pulls up the whole show against a shoulder on the crank.

That's balancer, front belt guide, crank gear, rear belt guide, oil pump gear……..all hard up against the crank shoulder.

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Paulusc44 Enthusiast

Paulusc44

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Posted

The slot in the rear belt guide plate is there so you can easily fit the plate without having to remove the woodruff keys.

Once in position it's way behind any key.

But it's not going to slip/rotate or whatever on the crank.

The balancer bolt pulls up the whole show against a shoulder on the crank.

That's balancer, front belt guide, crank gear, rear belt guide, oil pump gear……..all hard up against the crank shoulder.

Cheers for the excellent description mate, thats what I suspected.. Just needed a bit more torque on the crank bolt.. :)

Ben C34 Grand Master

Ben C34

Posted
Posted

If that plate is rattling cos you didn't do the bolt up tight enough hand in your spanners and sit in the corner untill you figure shit out.

No. Spanners. For. You.

You don't deserve them.

They deserve better.

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