This one is a bit baffling.

Came in next door with a broken cambelt.  New belt, tensioners and pushrods fitted.  Started, a bit noisy, but otherwise Ok.

Came straight back in with a broken pushrod on #4 inlet.  Head off; all the inlet valves are hitting the pistons - big time.

Cam timing re-checked - all perfect; cam/crank keyways fine.  Timing pin in correct hole in flywheel.

Apart from the new pushrods looking different and being 0.4mm longer overall than the old ones, nothing seems out of place.  [All valve clearances are correct.]

I'm working on the premise that the cam is too advanced - but how?

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As you suggested, you would expect the valve timing to be wrong for the valves to hit.

Were they all still hitting, or were the scars from when the belt failed originally?

I could give up Stella, but I'm no quitter.  

All still hitting; there was one broken new pushrod, the rest of the inlets were bent.

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Oval big ends? Maybe check deck heights?

Just an auto electrician throwing something into the mix (please be gentle with the abuse!) so probably well wide of the mark.

Regards, Ian.

_______________________________________________________________

Experience is something you don't get until just after you need it!

To actually bend the valves, I'd put my last pound on the valve timing being out.

Had a Discovery ages ago which we had the head skimmed on, the valves hit. We ended up using a headsaver on it. Even so, it didn't bend the valves.

Dave, How do you mean cam lobes moved?

I could give up Stella, but I'm no quitter.  

Any possibilty that the lobes have "Moved" on the  camshaft !!

Regards

DaveH

   

     Back to basic's, confirm position of TDC with DTI (or bubble on injector port )  Then confirm cam timing with DTI if data avaliable or at least check valves on the rock.

    Cheers Aidan

Definition of Experience :- `Something you get, when looking for something else.’  I think I'm getting to much experience nowadays

from memory there are two cambelts for these..............................................

Angus,

          the pushrods, followers and rockers were revised during August 1998. I only have the later pushrod in stock, so I cannot compare. I assume tensioner (s) was a Freudian Slip - only one tensioner, and no idler pulleys on these.  I wonder if the later pushrods have been supplied for a '99 registered vehicle that was built prior to August 1998. PM me the VIN, I can check.

I stand, to be corrected.

I had a look at the pistons with the head off and they all seem the same deck-height - it's a thought though....

Chris

I saw the van when it first came in [it's right by my back door] and the head wasn't removed - up to that point it was a routine broken cam-belt job.

Dave

I did consider a composite camshaft; but as Ford say no - and you have to turn the van upside down to remove it - that one will have to wait.  I'm right in thinking that to hit inlets, it's too advanced?

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