F4R crankshaft

[Stanneman]

Small question.

My engine mad some bad sound so I have taken it apart.

I found some bad things in my carter pan.
So i looked further and found not a good thing.

My crankshaft is dead, can I replace it with any F4R crankshaft, are they all the same?
Are manual and automatic crankshafts the same?

I can buy a complete engine but it is an automatic from a scenic F4R.

Put some photos to the story.

Thanks for your help

Greetz Stan

 

[bloke]

cranks are all interchangeable. was it no2 big end and no3 main bearing?

 

[bozothenutter]

@Radugns ....maybe use tanged bearings?

 

[Radugns]

You can buy any crankshaft for f4r, the 172 is lighter, the 197 in heavier, but is the only one from factory that goes to 7500rpm.

 

[Radugns]

@Radugns ....maybe use tanged bearings?

But who will modified my rods and engine block to accept them?

 

[bozothenutter]

looked at notches...a lot of notches!
what you need is one of these: http://mindworks.shoutwiki.com/wiki/File:Narrow-wth_key_seat_cutter.jpg

use an old bearing as protection for the conrod, and feed the cutter into the bearing untill cutting into the metal of the conrod or cap.
not really that difficult...if you have the stuff.
could be done on a collumn drill with the height fixed and a stop for the vice you hold the part in......but i'm slightly mad anyway

Or maybe use something as simple as a file?
the notch is tiny, just don't slip

 

[Stanneman]

cranks are all interchangeable. was it no2 big end and no3 main bearing?

only the second connection rod, main bearing are ok.

 

[bloke]

pretty much always no.2

 

[Stanneman]

Do you know why?

 

[bloke]

not worked it out yet, oprv sticking open is common on them but not actually looked at the way the oil feed runs through the block yet.