MQ sd33 rebuild

[shorty.mqute]

g'day, im rebuildin me sd33, got new pistons and rings in, but amin the shit now. when i tighten the con rod bolts to finger tight the crank can still rotate, but when i apply the right torque to the bolts, i can no longer turn the crank. could this be a bearing prob????

[Area54]

Ah, yes, I would think so.

[shorty.mqute]

Ah, yes, I would think so.

are there any way i can check this to see if it is the prob?.....

[ShortyMQ]

Sounds like you got the wrong size bearings.You may have to measure the journals on the crank to get the right size.

[Hoonz]

u can't do it with vernia calipers ... i'd take it to a proper crank grinding place and get it reground to suit the new bearings


if u try and do one the others will flog out 5000km later
u have to get the whole crank done

[ShortyMQ]

u can't do it with vernia calipers ... i'd take it to a proper crank grinding place and get it reground to suit the new bearings


if u try and do one the others will flog out 5000km later
u have to get the whole crank done

But if the crank is ok it would be easier to get the correct bearings than regrind it.

[Hoonz]

or that too

[V8Patrol]

Take the crank to a engine specialist and get them to measure it and supply the correct bearings. It should cost less than $100.00 to get a crank ground and polished, a small price to pay compared to redoing the work all over again !!!!!
do it once...........do it right

[shorty.mqute]

Sounds like you got the wrong size bearings.You may have to measure the journals on the crank to get the right size.

na, i didnt get new bearings, only pistons and rings and sleeves, had bottom end rebuild last year under warranty. i think maybe wrong bottom end caps on wrong con rod causing them to stick, thanks for all ya suggestions everone though..

[ChevyMQ]

Just make sure you have the big end caps around the right way as that will cause it to jam as well

["CANADA"]

hate to bring up a old thread
but did you ever sort out your problem?
it sounds like you have your bearings mixed up either the knotch is on the wrong side or somthing...

[V8Patrol]

I ended up buying the rig and I use it as my "Work Hack" so its driven on a daily basis.
The motor has been changed over to one I knew that was healthy after I managed to fire the original one up..... it wasnt good at all, smoke everywhere !, I havent stripped it down at all but its still here for that "one day" job.
It may never happen as I have 2 other spare SD33's for the old girl when this one lets go.

As for the excessive smoke comming from the original donk ..... I can only say is of an amount that would suggest that there were no rings left at all......its that bad !. Vehicles following behind would have to sit around 400 metres back to have any chance of visiability



Kingy

["CANADA"]

ive had a bluebird like that even got a letter from the EPA about it