doing some bottom end work - what fasteners to replace?

[nachoman]

I'm planning on doing some bottom end work on a bone-stock 200. The main purpose is to replace a badly leaking rear main seal, but I think I am also going to have the crankshaft machined (or install a crank kit) to correct slowly declining oil pressure. The engine has about 120k since it's last rebuild. this is a daily driver and I will probably always keep it near stock.

My question: What fasteners do I need to replace? Rod bolts? bearing cap bolts? The oil pump will be replaced, too. Does the pickup tube or oil pump drive shaft need to be replaced?

I plan on doing this while the engine is still in the car. Other than a comfort factor, does anyone see issues with doing this?

thanks,
Kevin

 

[Bort62]

There is probably no reason to turn the crank.

the crank journals are a lot harder than the bearings. You have to do something pretty bad to damage them.

I would just throw new bearings in it and call it good. Should be good for another 120k miles

A lot of guys on here will tell you to get ARP rodbolts or do this or that, but they are all pretty good at spending other peoples money.

For a stock motor, throw some new bearings in it (20$) while you are down there and then button it back up.

 

[rbohm]

8) since this is a second rebuild i recommend replacing the rod bolts with arp bolts. they are cheap insurance against breakage. the main cap bolts you can reuse again if you like, but i also recommend replacing those as well. i do agree with bort though if this were a first rebuild. as for the bearings, check the clearances, with 120k miles on the old ones, you might need to go to a .001 under bearing, assuming the ones in the engine now are stock size, check them to be sure. otherwise i agree that tossing in a set of bearings is about all you need to do to freshen up that area. check the cylinder bores for out of round and taper. if they are in good shape then toss in a fresh set of rings as well. moly rings are the best way to go, and DONT hone the cylinder bores, the moly rings will seat just fine on the smooth bore.