f4i motor rebuild

Old Mar 9, 2011 | 01:28 AM
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f4i motor rebuild

first n foremost, this thread is about the same ******* CURSED motor:
https://www.stuntlife.com/forums/444...ld-seized.html
...yes, it below AGAIN...for the 3rd or 4th time. ive lost count

motor seized
i split the case
piston #1 rod bearings were smashed, crank was still good
bought 2 new yellow bearings and popped em in
also bought 4 new new piston rings and popped em in
bought a new automatic/stock cam-chain tensioner and popped it in (i hate manually timing with the APE)
put everything back together
no FI codes
motor idle fines, no knocking, no ticking...sounds strong

problems:
1. as soon as i rev it and let go, the motor dies. (unless i stay on the throttle in which case the rpms heavily fluctuate)
2. if i let the motor sit and idle, until it reaches 230 farenheit, kill it, and try to start it again...it HARDLY cranks, sounds like the crank is struggling to spin
3. at idle, when i pull in the clutch, the revs go up 400-500rpms...but i'm thinking this is normal and from the extra load from the tranny/clutch mechanism

i'm scared to ride it, cause i think i'll blow/seize the motor again

i think the problem could be fuel pump, intake valves, exhaust valves, tranny, plugs, coils along with a thousand other things, and idk where to start.


any of this sound familiar to anyone?

i'll ship a 12pack of brew (budlight) to whoever can help me fix this

Last edited by DirtyToes; Mar 9, 2011 at 01:50 AM.
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