4d56 mits experts help please. I need accurate advice as to why an 3989 4d56 non turbo in a delica van would break the rocker sh

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roadkillcafe, Apr 22, 12:43am
Thanks but i dont think so (if it didnt do it with old head then it wouldnt be logical for it to do so now with brand new head with it's clean valves, combustion chambers etc)

P.s all internal areas of head/combustion chambers, etc were measured and were the same as the head that came off (while looked to be the original)
jmma, Apr 22, 3:33am
Pump timing!
roadkillcafe, Apr 22, 3:47am
The injector pump timing was set correctly as per the cambelt mark/pointer.
jmma, Apr 22, 3:51am
Its just that mine was a tooth out and it sounded like the tappets were coming out the tappet cover (o:
ladatrouble, Apr 22, 4:53am
There were also 2 different belts for the early engines - same length and tooth count, but different pitch. Wrap the belt completely around the cam sprocket and make sure theymatch.
gizmsme, Apr 22, 4:57am
Square tooth and round tooth if my memory is correct.
dozerman, Apr 23, 3:07am
Is the gasket the same thickness!grade 1 1.45 mm
rlr29, Apr 23, 5:13am
Where did the valves come from!If this is an after market head make sure the valves rockers etc. are all correct and not mixed or offset and or sticking.
rlr29, Apr 23, 5:18am
I was thinking something like this.Check the guide angle too.
dozerman, Apr 26, 2:50am
tell us what was the cause!
peter, Nov 9, 1:08am
Did you find out what it was? I have the same problem...