Timing Belt Failure

[VXorado]

[voyeur]

Cheers.... looks like 3/4".... or perhaps 20mm...

thanks for this... i will get back when I get around to having a go at drilling it out...!!!

[voyeur]

needed a puller to get crankshaft pulley off...

[voyeur]

Fractured cam belt tensioner pivot pin. Remnants still in Block.

[Greasemonkey]

hi its not very long about 17mm - and its been over tightened !!!! no other reason - lets take into account it doesn't hold the tensioner on lol its just a bolt which the tensioner rotates around - so its not a tensioner problem -
you will find the bolt section should just turn out - as its not a tightened bolt like i said - use a reverse drill bit or a nice branded punch the tuen it out no need to drill - i have some drill bits from snap on which would be perfect to snag it and turn it out
regards
Steve

[johnnyapollo]

Drill and use an easy-out. Be careful not to mar the threads in the block when you drill your pilot hole. It shouldn't be too bad - the bolt is large enough. I'm not sure how hard the steel is in the tensioner but from the way it sheared it's probably not case-hardened. Just take things slow.

For the plastic covers - you should be able to find those in a junk yard from any of the other 3.2 or 3.5 motors in Isuzu/Holden/Etc vehicles (also Honda Pilot/Acura MDX).

-- John

[voyeur]

back from break with family so getting back under the hood....

thanks for the tips guys... I drilled and used easy-out....



as it had snapped it wasn't very tight and came out relatively easy (as Greasemonkey suggested)... put cam belt on last night... (kit from Rock Auto... dead impressed with price and quality)... then took it off again... then put it on again... feels like good compression over 2 revolutions so hoping valves are OK.... will try to get some timing covers before the weekend..

cheers again

david

[blacksambo]

Remember for the 3.5L the factory mannual for cam timing is off. You must go by the later issued service bulletin data sheet to get the cam timing right...for 3.5L. I don't know about the 3.2L, though.

[voyeur]

Only managed to source the lower timing cover which had been the most badly damaged... repaired the upper Left and Right with superglue for a trial and it fired up first time using the standard timing set up:
Crank - notch to mark on oil pump RHS line on belt LHS
Odd bank - spring to 12 O'clock index on cam cover then leave
Even bank - spring to 9 o'clock then rotate 90 degrees to 12 O'clock index on cam cover

and gotta give another plug for Rock Auto who got parts to the UK the week before Christmas when all UK deliveries were stuck in the snow. QUALITY


I guess we might also conclude that as my tensioner "fell off" while in the fast lane of the M27 the 3.2 JDM is non-interference...