 Rebuilding the 2056, To tight? |
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| 72914S |
 May 28 2007, 07:56 AM
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love this shot  Group: Members Posts: 1,290 Joined: 10-July 03 From: Pensacola,Fl. Member No.: 900 Region Association: South East States  |
Well I finally got all the pieces for the rebuild.Yesterday Joe(Redneck Racer) came over,we planed to check the deck height.We put the crank in(those bearing pins are hard to line up).The rear main seemed real tight,finally got the dowel pin right and the crank turns freely.For the mock up I put the other case half on and tighted it up,now the crank won`t turn at all.Joe thinks I need line boreing.Let me say that this engine spun the rear main and cooked # 3 piston.Anyone out there have any thoughts. Am I doing something wrong.
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| Jake Raby |
May 28 2007, 07:38 PM
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
This case MUST have the main bores measured both with and without the main bearings in place as it sounds suspect for a case of main saddle collapse.. This can happen when a single bearing gets very hot and stays that way for a long while before failure. You can send us the case for eval and align bore if you want.
The big rule of thumb is that the engine must turn absolutely free when the shortblock is assembled.. It should take absolutely no more than 8 inch pounds of torque to rotate the engine with the shortblock totally torqued! Some people think that engines that are new should be tighter at assembly time and that they'll free up as the engine gets some time on it...WRONG!!! If anything they'll have high oil temps and SEIZE in extreme cases! It sounds to me like you may have "missed a pin" when you installed the crank.. IF you had my video I would have shown you the easy way to keep from doing this.... The video makes the assembly much faster and takes a lot of guesswork away. |
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Posts in this topic
72914S Rebuilding the 2056 May 28 2007, 07:56 AM
Bleyseng Check the clearances in each bearing with some pla... May 28 2007, 10:16 AM kwales Bearing bores don't usually get smaller. My g... May 28 2007, 11:30 AM McMark Pull it apart and inspect the main bearings. Prob... May 28 2007, 04:27 PM r_towle I agree, and obviously you need to take it apart.
... May 28 2007, 05:26 PM McMark Aren't the main bearings designed with a certa... May 28 2007, 05:29 PM r_towle Not that I know of, but Jake will know.
If that wa... May 28 2007, 05:33 PM McMark I'm definitely not talking about 0.125" o... May 28 2007, 05:37 PM r_towle never bothered me..
But, I dont do as many as Jake... May 28 2007, 05:57 PM 72914S The crank has been pro ground(20 over)& balanc... May 28 2007, 07:37 PM shaggy
It sounds to me like you may have "missed a ... May 28 2007, 07:48 PM
ptravnic
jake's video does help even though it dosent ... May 28 2007, 08:06 PM 72914S I have Jakes video quess I`ll watch it again. May 29 2007, 06:20 AM Joe Ricard We pulled the pin and tried it that way, no differ... May 29 2007, 06:48 AM |
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