trinity5007 Posted August 19, 2020 Share Posted August 19, 2020 Hey so... I ran I to a tough spot it seems. My engine blew.. I picked up a new/used block. It needs a rebuild but everything is in spec minus the a few things. Going with all new internals but I'm having a hard time finding a crank shaft. I'm not sure if it's worth it for me to go stroker or keep it stock. I'll be porting the head to allow for more air flow but otherwise keeping the rest stock. Anyone have lines on crankshaft suppliers? Engine is a 1992. 4.0l Link to comment Share on other sites More sharing options...
eaglescout526 Posted August 19, 2020 Share Posted August 19, 2020 Mopar one for $1500 Link to comment Share on other sites More sharing options...
Pete M Posted August 19, 2020 Share Posted August 19, 2020 28 minutes ago, trinity5007 said: My engine blew.. is there a story to go with that? what failed? Link to comment Share on other sites More sharing options...
trinity5007 Posted August 19, 2020 Author Share Posted August 19, 2020 Just now, Pete M said: is there a story to go with that? what failed? Haha I wish. Basically i rebuilt another block. And put an engine tech oil pump in it. Ran about 5000 km on it then the oil pump failed took out the block while on a trail ride. By the time I realized what happened it was too late and I just said screw it and drove as far as I could. Made it to a budys place it's been there ever since. Engine still starts and runs but noisy and smokey. Oil pressure comes up to about 30 psi and slowly drops as it warms up. I'm not totally sure what happened but she done either way. It's probably salvageble but... the block has over 300 000 km on it it was hydro locked and rebuilt once already didnt see a point in boreing it out and redoing it again. Found another complete engine ax15 and np231 for $400 cad couldnt pass up that deal. I run ax15 in my truck as is. They are hard to find. Figured even if the block was shot the rest was worth it. But I tore the engine down camshaft has weird wear on it timing chain was worn pistons have mild scoring and rod bearing number 1 was damaged and oozing out the side. Guy said it had a slight knock... Haha I'm not surprised. But I measured the block everything checks out. No scoring in the cylinders and they fall into factory spec. So now I'm just tracking down parts. This thing has gone from 2wd to 4x4 6 inches off the ground to 24 inches to my lowest point. Had a renix ecu now its swapped over to a 92 ecm. Btw well worth it but alot of work. Finally got the engine humming alot happily then bam just one bad week. Driving down the trail drove through a water hole nothing out of the ordinary the an hour later lost oil pressure and things got loud. Sorry maybe a longer story then expected. The fall before I was out rock crawling I was going up the steepest sketchfest stuff I have ever done. The thing performed flawlessly... I figured if it was going to go it would have been 3 hours away from home in the middle of no where. But nope it goes 20 minutes away on a trail i hit up regularly. Link to comment Share on other sites More sharing options...
Pete M Posted August 19, 2020 Share Posted August 19, 2020 yup, sounds like a 4.0 to me. been through hell and back... still runs I think we need a new thread about what the 4.0 has survived Link to comment Share on other sites More sharing options...
trinity5007 Posted August 19, 2020 Author Share Posted August 19, 2020 Haha no doubt. She is noisy smokes like crazy but.. stil runs still drives. Idk how far but I will Link to comment Share on other sites More sharing options...
Eagle Posted August 19, 2020 Share Posted August 19, 2020 What's wrong with the crank in the "new" engine you just bought? Why not just use the crank that came in it? Link to comment Share on other sites More sharing options...
trinity5007 Posted August 19, 2020 Author Share Posted August 19, 2020 18 minutes ago, Eagle said: What's wrong with the crank in the "new" engine you just bought? Why not just use the crank that came in it? That one would have to be turned. Con rod number 1 was trying to spot out the bearing. And the crank has major grooving in it. Unfortunately it's a 45min drive to a machine shop and they want 600 cad to do it. I was able to source one through Clegg's for alot less. Then it's a new crank ready to go Link to comment Share on other sites More sharing options...
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