Technical Engine issue

[Macaulay]

After some advise on a Citroen nemo 1.3 hdi
Have carried out a timing chain and rocker replacement following a timing chain tensioner fail . All turns over nice timing marks line up once turned over twice again however as soon as I fit the timing cover and oil pump then fit the drive through to the crank and torque the engine becomes incredibly tight to turn over to the point the starter won’t turn it over . It’s already got a new oil pump as was damaged due to the chain is there something I’m missing I can’t see why it should go so tight as soon as the oil drive goes in
If I then take the pump of this turns over easily with your fingers and then just put the drive on the crank with the pump of it all turns over well again including on the starter
Any advise appreciated
Regards

 

[bugsymike]

After some advise on a Citroen nemo 1.3 hdi
Have carried out a timing chain and rocker replacement following a timing chain tensioner fail . All turns over nice timing marks line up once turned over twice again however as soon as I fit the timing cover and oil pump then fit the drive through to the crank and torque the engine becomes incredibly tight to turn over to the point the starter won’t turn it over . It’s already got a new oil pump as was damaged due to the chain is there something I’m missing I can’t see why it should go so tight as soon as the oil drive goes in
If I then take the pump of this turns over easily with your fingers and then just put the drive on the crank with the pump of it all turns over well again including on the starter
Any advise appreciated
Regards

Have you compared the new pump with the original one in case it is a poorly manufactured copy?
Apart from that have you checked to see if any fouling marks on inside of chain cover?
I have done this job on the 06 Fiat Grande Punto 1.3MJ, I am assuming similar engine with free wheeling crank pulley until torqued up fully with new reverse thread bolt.