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06-07-2002, 12:57 AM
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#1 |
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Livin' it up.
 
Join Date: Nov 2001
Location: Richland, MI
Posts: 2,212
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Main caps
Can you buy main caps from aftermarket sources or is it basically the ones that came with the engine stay with the engine? i wonder cuz i just tossed out a set of main caps earlier and am wondering if that was dumb or what.
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-Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires. 
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06-07-2002, 01:00 AM
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#2 |
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Recovering 67-72 Addict
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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If you put main caps on an engine other than the original then you need to line bore the block again. People do this though to convert 2 bolt blocks to 4 bolt. If you have a junk 2 bolt block then I would personally junk the main caps also.
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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06-07-2002, 01:03 AM
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#3 |
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Livin' it up.
Join Date: Nov 2001
Location: Richland, MI
Posts: 2,212
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it was a stock 4 bolt main, should i go dig the caps outa the can?
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-Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.
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06-07-2002, 01:09 AM
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#4 |
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Recovering 67-72 Addict
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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I don't really know about small block caps but I know that big block 4 bolt caps usually fetch about $50.00 on E-bay.
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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06-07-2002, 07:15 AM
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#5 |
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Used to have a truck
Join Date: May 2002
Location: port orchard WA
Posts: 1,552
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You screwed up. Go fish them out of the can . Replacement main caps run $100 ( china )-$200 (milidon) and lineboring a block is in the $125-$200+ range. Makes for a nice block but spendy plus you'll need a different timing set to compensate for the shorter overal deck height.
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No truck :-( |
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06-07-2002, 09:49 AM
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#6 |
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Senior Moment
Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,185
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Make sure those caps are in the right order also or your still in trouble
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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06-07-2002, 10:02 AM
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#7 |
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Registered User
Join Date: Mar 2001
Location: Moore, Ok
Posts: 1,149
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Once you dig them out of the can look and see if they are marked anywhere. As 1970 CST Short Wide stated it's important to put them back in the same position they came from. If they are not marked, all is not lost but you should have it linebored or linehoned. Your machinist should be able to check it and determine which you will need. If you are planning to reuse the rods mark the rods and caps also, you dont want to mix them.
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72 SWB parts and pieces Oklahoma |
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06-07-2002, 12:12 PM
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#8 |
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Account Suspended
Join Date: May 2000
Location: IL
Posts: 0
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i hope those caps were marked...... or big uh oh..
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06-07-2002, 09:14 PM
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#9 |
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Livin' it up.
Join Date: Nov 2001
Location: Richland, MI
Posts: 2,212
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trash men got em so i'm gonna hafta go with new milodon caps if i ever build this motor
__________________
-Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.
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06-08-2002, 10:10 PM
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#10 |
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Registered User
Join Date: May 2000
Location: trenton texas usa
Posts: 232
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in that case you will be better off in buying the gm crate motor for 1200 bucks like i did......
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06-09-2002, 03:32 PM
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#11 |
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Livin' it up.
Join Date: Nov 2001
Location: Richland, MI
Posts: 2,212
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what crate did you find and what is it rated at might i ask?
__________________
-Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.
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06-09-2002, 11:15 PM
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#12 |
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Registered User
Join Date: Mar 2001
Location: Moore, Ok
Posts: 1,149
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The GM crate engine that sell for around $1200 is basicly a stock spec 350 made in Mexico with all new GM parts. It does come with a GM warranty.They usually make about 200HP with a stock 4bbl intake, qjet and duel exhaust. Adding headers and a performer intake bump it to 240-250HP. If you decide to build or have a different engine built I think you would be money ahead just to find a different block unless you're planning on a 500+HP engine, in which case a aftermarket block might make more sense. Upgrading the main caps is fairly pricey and not really required even for a very hot street engine....Stroker
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72 SWB parts and pieces Oklahoma |
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