G60 cam belt slipped ...

[LJ 0]

Numpty Alert!

 

Hi

My G60 cam belt has jumped a "few" teeth at idle, after I revived it from a *very* long slumber.

Lesson learned about aged cam belts! :(

 

Will the valves have hit? It's running a Newmann 268/276 cam if that makes a difference.

What damage can I expect from this worst case :(

 

 

Chris

[RW1 0]

Have you taken out the plugs and looked into the cylinders with a torch to see if there are any bright spots ( valve / piston kissing ) on the top of the pistons? I think you may see that there are. :(

 

You wont be able to see all the crown areas of the pistons though.

 

.

[Supercharged 2]

As you are close it maybe worth getting it over to Dg Autotech as they have a Snap-On bore camera that can be use to inspect as above,

[RW1 0]

I hope no ones thinking of starting the engine nor turning on the starter. Tow/trailer job where ever it's going.

 

.

[pummer67 0]

dont forget to change your bottom pulley bolt for a new one when you have the belt off as they are prone to shearing.

[bcstudent 0]

I thought that the G60 WASN'T an interference engine, i.e. in a standard engine the pistons and valves can not touch. Fit a new cam belt and turn the engine over by hand. If it seems ok then try and start it. You have very little to lose.

 

You'll definitely want to be changing that bottom-pulley bolt though, as already suggested.

[wormy 0]

I thought that the G60 WASN'T an interference engine, i.e. in a standard engine the pistons and valves can not touch.

True, but an aftermarket cam might change that, depending on lift/duration.. :?

[pagurus 0]

Numpty Alert!

Hi

My G60 cam belt has jumped a "few" teeth at idle, after I revived it from a *very* long slumber.

Lesson learned about aged cam belts! :(

Will the valves have hit? It's running a Newmann 268/276 cam if that makes a difference.

What damage can I expect from this worst case :(

Chris

 

Jeez fella - the cam belt change aint that bad!

 

Tools

http://www.halfords.com/webapp/wcs/stor ... yId_165572

http://www.lasertools.co.uk/item.aspx?item=1686&cat=535

http://www.amazon.co.uk/Sealey-AK224-Mi ... B000RA0XZK

http://www.amazon.co.uk/Draper-24640-19 ... B0001K9RBM

 

Belts

http://www.vwspares.co.uk/corrado_belts.php

 

Cam Belt Change

viewtopic.php?f=1&t=93517

 

Crank shaft bolt replacement

viewtopic.php?f=25&t=94367

 

I tipexed the crank shaft and intermediate pulleys.

Counted the teeth on the fitted cam belt and used tippex on the new belt to set the same fix points.

Re-fit the new belt, checking all marked points were in line.

Voila :D

Works perfik.

A jumped belt probably means setting everything by the book tho :eek:

 

My posts need - needs an update tho for the tooth count numbers !

viewtopic.php?f=1&t=93517

 

Gud luck buddie :D

Can get the full method together if you are wantin it!, assuming you get a new cam belt, tensioner, and crank shaft bolt (advised). :lol:

[LJ 0]

I thought that the G60 WASN'T an interference engine, i.e. in a standard engine the pistons and valves can not touch.

True, but an aftermarket cam might change that, depending on lift/duration.. :?

 

I can never remember if the PG is interference fit or not :( My fear is it became interference fit after the cam ...

 

My kids are in bed now, so now I can visit the garage and remove the plugs and take a peek at the pistons!!

[LJ 0]

My kids are in bed now, so now I can visit the garage and remove the plugs and take a peek at the pistons!!

 

Can see bugger all through the spark plug holes! :(

From what I can see, there's no obvious damage to the piston.

 

Outer pistons are at/near the bottom of their stroke.

Inner pistons at/near top of their stroke ... piston 2 I can see a valve seat protruding down, whereas cannot on piston 3...?

 

I'll remove the old belt and see what happens when turning it by hand, and go from there.

 

Thanks for the links on the timing setting!