Well folks, put Daisy in garage to take a look at torque tube to see if we could fix it, so took that off and back axle then dropped the sump, to find out why it started leaking oil. Boy am i pissed off the back main bearing is chewed and the crank now needs regrinding (the engine has done less than 200 miles) Would the vibration from the torque do this much damage?? or is there something i'm missing????? Daisyduke
I agree with Unk lan,***embly (too tight) or not enough lube to it on intial start up. In 200 miles the vibration would have to been too severe to drive it to cause your problem.
Yep motor was rebuilt. Primed oil filter before starting up and crank was moving freely and had good oil pressure. She was fine for the first 100 or so miles. Daisyduke
Just had a look at the crank and the bit were the main bearing was is only worn (very badly there is about 1/2mm lip in the middle) on one side only??? Why would it do this i thought that it would be marked all the way round. Appreciate any help Daisyduke
Sounds like something might have been done wrong in the engine rebuild, OR its was just one of those things. Since the transmission was tight up to the back of the engine I would think that the transmission would have suffered more from the vibration than the rear main.
I seem to remember something about this guys warranty? What were we discussing? It had to do with engine oiling or something.
A stab in the dark w/o seeing the damage or looking at anything else - could the seal have been installed inorrectly or somehow been pinched in with the bearing? Just seems odd to be constrained to only the rear main & my only reason for guessing along those lines and it's only a guess... Got pics? Sorry to hear about it... But now's a good time to put a purple big block chevy in it!!!
I wouldn't want to be seen going around wearing nothing but pink and purple either! I'd be pretty pissed if a fresh motor did that...somebody somewhere screwed something up. Good luck fixing it!
how long did the crank sit out of the motor after being machined and balanced? How was it supported? Do you think maybe the crank got slightly bent? I know it can happen with flattys if the aren't properly supported. It's the only thing I can think of that would cause a lip on a bearing journal only on 180 degrees of the rotation. Also might explain some of that vibration?
long shot but i had a engine do the same thing before . the rear main got pretty bad it was cause the flywheel worked loose .but i doubt tht happened just putting my happings in to the mix
Are you sure you have the right main bearings? They had a design change in '56. I can't remember the exact details. Maybe 56+ had an oil channel in the middle or something like that.
It's a long shot, but could the crank have been machined incorrectly? If that last journal had been turned ever so slightly off centre, you could run into this problem. Since the crank will have to come out for a regrind - might be worth taking to a different machine shop for independent look.
Or maybe they got the wrong main bearing shell,in the wrong place..........like the one with the oil supply hole,installed in the cap,instead of the block. OR maybe they put TWO shells with oil holes in ONE bearing location,and shells with NO oil holes in that rear main. Have someone you KNOW and TRUST do the teardown.
I think it looks like me who F@*$ed up. Not 100% sure but I could have had the shells fitted wrong the one with the hole in the cap instead of the block. When i took the cap off the two shells fell out so can't be sure, but its looking that way Just hoping the crank can be ground cause the scoring is pretty deep and I am already at +20
TD - you weren't under any pressure from Daisy to finish in a hurry were you? Well, you could turn it to whatever the max bearing you can find is & see where that gets you...
Hey Flat Ernie you know he LIKES being whipped. Anyway engine was finished months ago it was just the paint work that i had to whip him for. Looks like it's at least 70 thou out. Appartently the only bearing shell without a hole and HE manages to put it in the wrong way!!!!!!!!!!!!!!!!!!!! So Does anyone have a crank for a 228 GMC straght 6 Daisyduke
Well This really ****s don't it Have it welded up and re-turned. That should run less than shipping on even a free one. ($40-$100 USD) Check for it being bent first though.
[ QUOTE ] So Does anyone have a crank for a 228 GMC straght 6 [/ QUOTE ] Yes I do! Shipping would ****...but you can have it... sounds like you need it. Last resort maybe?? I dunno... maybe someone has a container heading your way???
Damn,I wish I could perform the laying on of hands & eyes.I would have to think if both shells fell out at once the bearings were definitely stacked which is not a good sign. Might indicate that vibration not related to d-line at all.Probably bent or mis-machined crank. Cranks should always be stored standing on flywheel flange.
Daisy/Tail : talk to Geordie Paul, he will ship stuff at cost if you get it to his shippers in ( I think ) LA... Real shame, saw the truck at thorney and she was lookin' good.
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