How To Clean And Reuse Connecting Rods
Thread: Reuse stock connecting rods from failed engine??
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11-21-2019,12:26 AM #1
Reuse stock connecting rods from failed engine??
I picked upward a really dainty 2006 4 tec cake from a GTI 130 with very few hours on it. Its and so clean looking that y'all can swallow off it.. Machinist will make up one's mind to bore, if and then, how much oversized..
From my failed engine which I rebuild, it was fitted with Molar connecting rods and .5mm Oversized CP pistons.When the failed engine was disassembled, #two piston was found to be the trouble, information technology melted at the peak edges. #two connecting rod showed blueish/black discoloration at the big end. Discoloration was on the large end, sparse, flat, circular side surface near the beginning of the rod's H formation on both sides. The big terminate bearing showed farthermost rut but didn't damage the crankshaft journal and all chief bearing where practiced.
#1 and #iii connecting rods showed no discoloration or signs of rut, aforementioned with their large end bearings, look similar new.
My question is.. Would information technology be okay to reuse #one and #iii Connecting rods for the 2d engine build?
Information technology won't be for a turbo awarding merely maybe upwardly to 15 psi @ 8600 may be in the works for it.
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xi-21-2019,02:58 PM #2
Others may have a different opinion, but on past engines I accept built using parts from catastrophically failed engines, my view is that connecting rods tin can exist reused from cylinders that have no drama. For example, on an engine that drops a valve in #1, I would reuse connecting rods from the other two cylinders as long as at that place is no visible damage to those pistons. I would non reuse a connecting rod from a cylinder with any damage at all on the piston. The one exception is from engines that failed from hydrolocking. I won't reuse any rods from the cylinders that look practiced, because when i cylinder fails from hydrolocking, impairment can exist in the other cylinders that isn't visible. The rods may await OK but will notice their way out into sunshine when reused.Originally Posted by tiderider
I picked up a really nice 2006 4 tec block from a GTI 130 with very few hours on it. Its so clean looking that you can eat off it.. Machinist will determine to bore, if so, how much oversized..
From my failed engine which I rebuild, it was fitted with Molar connecting rods and .5mm Oversized CP pistons.When the failed engine was disassembled, #2 piston was found to be the problem, it melted at the top edges. #2 connecting rod showed blue/blackness discoloration at the large end. Discoloration was on the large terminate, thin, apartment, round side surface almost the beginning of the rod's H formation on both sides. The big stop bearing showed farthermost heat but didn't harm the crankshaft journal and all main bearing where good.
#ane and #three connecting rods showed no discoloration or signs of estrus, same with their large end bearings, expect like new.
My question is.. Would information technology be okay to reuse #1 and #three Connecting rods for the 2d engine build?
It won't exist for a turbo application but perhaps up to 15 psi @ 8600 may be in the works for it.
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11-22-2019,07:53 PM #3
Thanks for this Nifty advice!Others may take a unlike opinion, simply on by engines I take built using parts from catastrophically failed engines, my view is that connecting rods tin can exist reused from cylinders that have no drama. For example, on an engine that drops a valve in #1, I would reuse connecting rods from the other two cylinders equally long every bit in that location is no visible damage to those pistons. I would not reuse a connecting rod from a cylinder with any damage at all on the piston. The one exception is from engines that failed from hydrolocking. I won't reuse whatsoever rods from the cylinders that look good, considering when one cylinder fails from hydrolocking, damage can exist in the other cylinders that isn't visible. The rods may look OK but will find their way out into sunshine when reused.
I just purchased a New set of Molnar Connecting rods for $300.. Early Black Friday!!
I installed a fix in the outset rebuild and honestly, they are VERY Squeamish.
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eleven-22-2019,10:55 PM #4
Where did you get em?Thank you for this GREAT communication!
I just purchased a New fix of Molnar Connecting rods for $300.. Early Blackness Friday!!
I installed a set in the first rebuild and honestly, they are VERY NICE.
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11-23-2019,05:36 PM #v
It was an online seller who had 1 last set in stock.. Good timing!! $lx is connecting rod bolts solitary if I would have replaced merely 1 OEM con rod.. Molnar con rods come with ARP2000 reusable bolts. Honestly the stretch bolt method isn't that time consuming or difficult at all..Where did yous get em?
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11-25-2019,09:27 PM #6
This is how I run a jetski shop in the desert
Thank you for this GREAT communication!
I just purchased a New prepare of Molnar Connecting rods for $300.. Early on Black Friday!!
I installed a fix in the first rebuild and honestly, they are VERY Prissy.
a very wise move going with new con rods. good luck on your build
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