COuld i do this?????
Thread Starter
Junior Member
Joined: Jun 2000
Posts: 40
Likes: 0
From: Cary,IL,US
COuld i do this?????
could i just rebuild a 350 with new rods and pistons, rings, and bearings without boring and honing the block? could i just put standard size pistons back in it or have they worn the cylinders too much.
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86 IROC LG4,DUAL SNORKEL,AMERICAN THUNDER,3.27 GEARS
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86 IROC LG4,DUAL SNORKEL,AMERICAN THUNDER,3.27 GEARS
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
That depends on the condition of the block. There's no way to make a general statement that it's OK to do that; I'd place the odds at far less than 10% that you could get a satisfactory result out of just sticking a bunch of new parts in a random unprepped used block.
If it has no taper in the cylinders, and less the .003" of ring ridge at the top, then you can hone it and run it. If it has more than that, you should probably get it bored. If the cross-hatch pattern from the last time it was honed is still there, then you can squeak by without honing it. I don't beieve I've ever seen a block with more than about 5000 miles on it that I would consider acceptable to install new rings into; and even then, the quality of the ring job would be compromised by the lack of a newly freshened surface to break the rings in properly.
On the other hand, lat me ask the flip side of the question. You're about to spend... how much on rods, pistons, rings, bearings, and everything else?? And you're going to do... how much labor? And you're going to take the risk of putting something together that is that much expense and effort and time, and you're going to take the risk of it being a pile of crap because you're trying to avoid spending... how much on proper basic prep? Do you really care about the outcome of this project or are you merely doing a Krylon rebuild so you can sell it?
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"So many Mustangs, so little time..."
If it has no taper in the cylinders, and less the .003" of ring ridge at the top, then you can hone it and run it. If it has more than that, you should probably get it bored. If the cross-hatch pattern from the last time it was honed is still there, then you can squeak by without honing it. I don't beieve I've ever seen a block with more than about 5000 miles on it that I would consider acceptable to install new rings into; and even then, the quality of the ring job would be compromised by the lack of a newly freshened surface to break the rings in properly.
On the other hand, lat me ask the flip side of the question. You're about to spend... how much on rods, pistons, rings, bearings, and everything else?? And you're going to do... how much labor? And you're going to take the risk of putting something together that is that much expense and effort and time, and you're going to take the risk of it being a pile of crap because you're trying to avoid spending... how much on proper basic prep? Do you really care about the outcome of this project or are you merely doing a Krylon rebuild so you can sell it?
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"So many Mustangs, so little time..."
Member
Joined: Jul 1999
Posts: 496
Likes: 0
From: Chicago, IL
Car: 89 IROC-Z
Engine: LB9
Transmission: 700-R4
If you're buying new pistons why not just bore it?? I thought the only reason to try to squeak by with a hone job is to save by not having to buy pistons....
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89 Iroc-Z LB9 TPI auto 2.73 posi:
3" Dynomax muffler, K&N filters, TB bypass, 3" pipe in place of cat, cleaned and flow-matched injectors, accel 300+ wires, cap&rotor, synthetic oil, flexlite transmission cooler, afpr, !air pump&diverter valve, kicker sound system, soon to attempt engine swap...
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89 Iroc-Z LB9 TPI auto 2.73 posi:
3" Dynomax muffler, K&N filters, TB bypass, 3" pipe in place of cat, cleaned and flow-matched injectors, accel 300+ wires, cap&rotor, synthetic oil, flexlite transmission cooler, afpr, !air pump&diverter valve, kicker sound system, soon to attempt engine swap...