pattheriault Posted May 8, 2017 Report Share Posted May 8, 2017 Ok so My crank was trued and welded on my last rebuild. 4 mil hot rod crank. My piston melted down and while doing the top end I decided to inspect the bottom end. Glad I did. The bearing on the stator side was shot and the weld on my crank has cracked and it splitted out about 2mm. Can this crank be trued and re-welded or would i be better off getting a new Crank? Quote Link to comment Share on other sites More sharing options...
spurdy Posted May 8, 2017 Report Share Posted May 8, 2017 Ok so My crank was trued and welded on my last rebuild. 4 mil hot rod crank. My piston melted down and while doing the top end I decided to inspect the bottom end. Glad I did. The bearing on the stator side was shot and the weld on my crank has cracked and it splitted out about 2mm. Can this crank be trued and re-welded or would i be better off getting a new Crank? Any crank can be fixed. But I'd say if it is in that bad of shape, damaged bearing and broken weld, it has likely seen heavy detonation. So I would want the entire thing gone through. At that point, you're most economical solution would be to replace it. A 4m crank isn't that expensive. Sent from my iPhone using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
pattheriault Posted May 8, 2017 Author Report Share Posted May 8, 2017 every thing else looks to be in great shape.. then again Im no crank expert either.. But you are right being canadian by the time I ship a crank out (probably to the US) to get fixed and then back to me It might just cost as much as a new crank unless someone know of a reputable shop in Canada Quote Link to comment Share on other sites More sharing options...
pattheriault Posted May 8, 2017 Author Report Share Posted May 8, 2017 Yeah I'm leaning toward Jeff at fast right now. he's the one who originally built my engine and I had great service. i might send him my crank and let him judge if im better off with a new one or not. Quote Link to comment Share on other sites More sharing options...
nmrichardson Posted May 8, 2017 Report Share Posted May 8, 2017 what compression ratio were you running? Quote Link to comment Share on other sites More sharing options...
pattheriault Posted May 9, 2017 Author Report Share Posted May 9, 2017 was running 24cc dome on a 4mil with 795 pistons. 91 octane at 32:1 not sure what compression this setup adds up to Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted May 10, 2017 Report Share Posted May 10, 2017 Helical cut gears or straight cuts? I've seen many cranks destroy bearings from side loads, I would recommend good bearings that can handle side load and crank can def be pressed back n fixed but it needs to put on a jig and checked for runout on the centers Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted May 10, 2017 Report Share Posted May 10, 2017 Helical cut gears or straight cuts? I've seen many cranks destroy bearings from side loads, I would recommend good bearings that can handle side load and crank can def be pressed back n fixed but it needs to put on a jig and checked for runout on the centersOne Day, when I will stop being lazy, I will do the math about bearings to clear that up. Envoyé de mon SM-G935W8 en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted May 10, 2017 Report Share Posted May 10, 2017 Il y a plusieurs shop aux Québec qui sont capable de faire des crank. Envoyé de mon SM-G935W8 en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
pattheriault Posted May 13, 2017 Author Report Share Posted May 13, 2017 Il y a plusieurs shop aux Québec qui sont capable de faire des crank. Envoyé de mon SM-G935W8 en utilisant Tapatalk Can you Pm me a couple reputable shop? Quote Link to comment Share on other sites More sharing options...
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