Quote:
Originally Posted by Stu J  During building the rv8 up from scratch today I put in the main bearings, then the crank and then started the con rods with new rings on the pistons too.
After putting in all the pistons and tightening all caps to spec torque I couldn't help but think the crank was a little hard to turn. The front pulley was put on temp just to help but it showed some tight resistance with that... is this normal?
I removed all the pistons just to see if there was any dirt etc but all seemed normal, the crank and big ends are all standard size and oiled accordingly.
I am aware resistance should be there, but this much? without heads on too. | The only real answer is to remove the crank, thoroughly clean it and using a quality micrometer, check the journal sizes to make sure that they are in tolerance.
I speak from bitter experience, having once rebuilt a 1275 mini engine that the engineering company machined the journals too big for the bearings by a few thou. The engine wouldn't turn over by hand and being 16, and being stupid, I thought that was normal. The car wouldn't start on the starter and we should have suspected somthing then. We ended up tow starting it and it lasted 300 miles before it blew up!!!!!!!!!!!! You have been warned.
__________________
1985 DAX 427, Black, no scoop, no brightwork, no paint, 15" Revolution split rims, BFG boots, 3.5SP6RV8 with modified 4.2 heads, modified SU's with K&N, Kent 180 over Rhodes lifters, SD1 chain cover / P6 water pump, SS headers & side pipes, Jag/Jag with uprated lowered springs, AVO shocks, Red Dot spiro discs & fast road pads, Toyota Supra CR high 5th box & special clutch.
Looks like a dogs dinner, drives like it's taken 20 years to develop! |