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The risk to the oil pump with the sump on is that by forcing the timing case (which holds the pump) back on is that when lining up on the dowel pegs the case can crack or the pump inner gear can crack on the crankshaft. New timing cases are around £300! Also you risk tearing the sump gasket and having a leak, the sump gasket also seals the oil pick up pipe to the pump!
It is just poor practice to replace the chain by cutting it and pulling the new one around with the old one as you can not change the guide rails which wear, the sprockets and the tensioner which also wears out. All these parts come in the kit so why wouldn't you replace them??
 

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Discussion Starter · #42 ·
The risk to the oil pump with the sump on is that by forcing the timing case (which holds the pump) back on is that when lining up on the dowel pegs the case can crack or the pump inner gear can crack on the crankshaft. New timing cases are around £300! Also you risk tearing the sump gasket and having a leak, the sump gasket also seals the oil pick up pipe to the pump!
It is just poor practice to replace the chain by cutting it and pulling the new one around with the old one as you can not change the guide rails which wear, the sprockets and the tensioner which also wears out. All these parts come in the kit so why wouldn't you replace them??
Understood, I've ordered the required bits and will drop the sump. I would never consider just slinging a chain in without doing tensioners and guides
 
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