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Line Bore Mains? #598016
01/30/10 12:43 AM
01/30/10 12:43 AM
Joined: Apr 2009
Posts: 228
northeast texas
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strokin73cuda Offline OP
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I dropped off my block at chubby place one month ago and picked it up late this evening. He didn't know anything about aluminum main caps on a mopar (they where used off my old combo) butt I talked him into doing it anyway. Now I get home with it and the base of all the main caps still have the factory machine marks they had when I dropped them off along with the same signs of cap walk they had at that time. I also had the block bored .040 with plates (studs) and deck corrected to zero. This cost me $700 today and I have no way to check his machine work. What are the chances you can install used main caps on a Mopar and not do anything to the mating surface?


496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
Re: Line Bore Mains? [Re: strokin73cuda] #598017
01/30/10 12:51 AM
01/30/10 12:51 AM
Joined: Nov 2006
Posts: 419
huron,ohio
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b1headman Offline
mopar
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huron,ohio
It is not likely that the caps would work with out line boring first then line honing.Most of the blocks we have reclamed the al caps on require cutting the caps quite alot so the main bore will be round.You also need to make sure the #3 thrust surfaces are square.

Re: Line Bore Mains? [Re: b1headman] #598018
01/30/10 01:13 AM
01/30/10 01:13 AM
Joined: Jan 2009
Posts: 294
Minnesota
RockChip Offline
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Minnesota
I think you should take the block back to that shop!!! thares no way that you can just bolt used caps on another block, its a verry slim chance it would work
I install all sorts of main cap stuff on brand X blocks and you usually atleast have to hone the mains back to spec, but if he never cut them then he must be trying to cut corners on you

I would make them atleast double check while you watch and look for your self on that bore gauge to make shure its in spec

I hope thay didnt cut anny more corners on you, I would double check everything thay did.

Re: Line Bore Mains? [Re: strokin73cuda] #598019
01/30/10 01:20 AM
01/30/10 01:20 AM
Joined: Jan 2003
Posts: 31,078
Oregon
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AndyF Offline
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Oregon
I think you are saying that the block still shows signs of cap walk? I believe that is just the way it is going to be. I don't know of anyone who remachines the block when installing new caps. That area on the block would be very difficult to remachine.

I think the process is to cut down the main caps a small amount and then line bore and then line hone. The main cap surface in the block isn't usually cut.

Re: Line Bore Mains? [Re: RockChip] #598020
01/30/10 01:22 AM
01/30/10 01:22 AM
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4 Offline
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You got billed for it right? I would take the block back, ask if it was done and have them check it while your standing there. Explain why you think it's not correct. If it was not done ask for your money back and load it up. Aluminum caps are done all the time.


it's ok to butt heads, just don't do it with a butthead
Re: Line Bore Mains? [Re: AndyF] #598021
01/30/10 01:40 AM
01/30/10 01:40 AM
Joined: Apr 2009
Posts: 228
northeast texas
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strokin73cuda Offline OP
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No not the block it is a different block I am saying the main caps still have the same machine marks they had when I dropped them off along with the signs of cap walk that was original to the caps. YES I WAS BILLED AND YES IM PISSED I will get pics tomorrow of the main caps and the block. I don't know whay else to say I'm just pissed!!


496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
Re: Line Bore Mains? [Re: strokin73cuda] #598022
01/30/10 11:23 AM
01/30/10 11:23 AM
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Columbia, CT
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moper Offline
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id you talk to the shop about it yet or you just got PO'd? I'd talk to "the horse" before you get all heated.


Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
Re: Line Bore Mains? [Re: moper] #598023
01/30/10 11:56 AM
01/30/10 11:56 AM
Joined: Apr 2009
Posts: 228
northeast texas
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strokin73cuda Offline OP
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O.K. Ive cooled alittle scince last night, is there a way I can check the straightness at home? The shops not open today and I would like to have my guns loaded when I show back up at the shop.


496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
Re: Line Bore Mains? [Re: strokin73cuda] #598024
01/30/10 12:15 PM
01/30/10 12:15 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Quote:

O.K. Ive cooled alittle scince last night, is there a way I can check the straightness at home? The shops not open today and I would like to have my guns loaded when I show back up at the shop.




If you dont have the equipment to check it with the
most you could do is see if the cap and block have a
fresh cut mark on it... if it doesnt, they most likely
didnt do it.... at least a few of the mains would have
signs of a cut marks( no way would they all be perfect
again on a different block)..... if you have a bore
gauge at home you can check the bores but still
wouldnt know if its straight unless you try the crank
in it..... JMO

Re: Line Bore Mains? [Re: strokin73cuda] #598025
01/30/10 12:39 PM
01/30/10 12:39 PM
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Posts: 1,072
The Sunny Shuswap
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dodgefarmer Offline
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Staight is only 1 of the issues here. The others are alignment and size. Torque the caps in place and feel the parting lines for any misalignment. Your fingernail should not be able to "catch" anything in either direction at the parting line. Then with the caps still torqued measure each bore in 6 spots with an inside mic. The spots that I measure are top-bottom, 1" above,and 1" below parting line on the front edge of the bore, repeat on the back edge of the bore. Most bearing catalogues list the housing bore size with the bearing listing. P.S. always double check an inside mic reading with an (known good) outside mic. Also don't even bother to try any of this with a very near caliper (you need mic's) as they do not have the accuracy for this operation.

Randy

Re: Line Bore Mains? [Re: dodgefarmer] #598026
01/30/10 11:57 PM
01/30/10 11:57 PM
Joined: Apr 2009
Posts: 228
northeast texas
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strokin73cuda Offline OP
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My fingernail catches on two of the mains on one side heres some pics if I can get them to load this time.

5770965-maincap.jpg (38 downloads)
Last edited by strokin73cuda; 01/30/10 11:57 PM.

496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
Re: Line Bore Mains? [Re: strokin73cuda] #598027
01/31/10 12:00 AM
01/31/10 12:00 AM
Joined: Apr 2009
Posts: 228
northeast texas
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strokin73cuda Offline OP
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Another.


496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'
Re: Line Bore Mains? [Re: strokin73cuda] #598028
01/31/10 12:10 PM
01/31/10 12:10 PM
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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moper Offline
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Columbia, CT
It doesn look like anything was done in them from those pics. If the caps were re-used the mating surface should have fresh cutting marks and that doesnt. Catching a nail isnt always a valid test... I deburr the edges of the cap and block very slightly so the parting line "feels" uneven and will catch a nail. Measure it properly and see what the dimensions look like.


Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.






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