turbo 5sfe crankshaft - Toyota Nation Forum : Toyota Car and Truck Forums

MR-355-5sfTe · 01-18-2005, 08:29 PM

I've got a pretty simple question: Are there any crankshafts out there that would be able to hold up to the stress of a boosted 5sfe? I'm kind of worried about using a stock 5sfe crank with all of my other drop forged and hardened components.... I just thought it might become the weak point in my engine after all is said and done.
any input is appreciated,
thanks

91MR2quickNA · 01-19-2005, 04:37 AM

The stock crank is definitely not a weak point. You've covered the weak points if you've got forged pistons, rods, and a metal head gasket from 1997+ Camrys. Now if you have bad bearings in your crankshaft, then you'll eventually spin a bearing or experience crank knock.

The stock crank is used in 5S-GTE motors, some of which have produced more than 500rwhp. And also on 5S-FTE motors that have produced more than 400rwhp. Most of them have built bottom ends that are fully balanced and blueprinted, but still the crank is still a 5S crank.

Good info: http://www.mr2oc.com/showthread.php?t=4296

Pineapple · 01-19-2005, 09:13 AM

The 5S crank got bigger bearing then the 3S. Another reason why it can't rev high but able to give great torque.

MR-355-5sfTe · 01-19-2005, 08:34 PM

amazing! thanks for your help..... one last question though: I have an extra crank that apparently had bad bearings, because there is some wear from the crank contacting the piston... now the question is... am I still able to use this crank? should I get it ground smooth? or would I be better off just getting a new one? I'm thinking I should buy a new one... just because I know it's not had the best life.... I've found new cranks for around $250.... I just want everything to be assured when I get this thing together...
thanks again

Pineapple · 01-20-2005, 10:58 AM

Depends how much you have to grind down the bearing and how much it'll cost. If you have to grind too much, you can't find a bearing for the crank. If the damage is not on bearing surface, it should be fine, just sommth it out little bit. Too much and the crank lose balance.

MR-355-5sfTe · 01-20-2005, 09:31 PM

I will take some pictures of the damaged crank in the next couple of days, I will post them to see what everyone thinks..... but from what pineapple is saying, I think I might be able to simply smooth out the rought spots... but I'll wait to see what the experts diagnose from the pictures.....