LS4 / F40 swap - fieroguru (Page 101/216) fieroguru SEP 15, 08:46 PM Its Paul. bmwguru is Dave. The blue is a Ford/New Holland blue. fierogtlt1 SEP 15, 09:05 PM Thanks....sorry for the mix up. katatak SEP 16, 09:57 PM That Ball joint was kind of scary! Nice work on the front end - it looks great. One tip when burning out the bushings - place a bucket with water under the bushing - requires you to hold the torch but all the burning / melting rubber gets captured in the bucket - fire extinguished and is an easy clean up. dobey SEP 17, 11:28 AM quote Originally posted by katatak: That Ball joint was kind of scary! Nice work on the front end - it looks great. One tip when burning out the bushings - place a bucket with water under the bushing - requires you to hold the torch but all the burning / melting rubber gets captured in the bucket - fire extinguished and is an easy clean up. Use a large catch pan for a water heater instead, and you can avoid having to hold the torch too. Jims88 SEP 17, 09:44 PM Front end rebuild turned out NICE! Cool trick; pushing out those front wheel bearings! I will have to remember that one. CTFieroGT87 SEP 27, 01:38 PM Car looks great guru. Awesome to see the F40 cable brackets are ready. Any eta on engine/trans brackets? Also do you have an opinion on the GMPP LS376 harness swap kits (PN 19258267)? Mainly in terms of ease and simplicity. fieroguru SEP 27, 09:13 PM I am working on the LS4/4T65E-HD mounts right now. Once those are done and I do a test fit, I am planning to switch over to the LS4/F40 mounts once I know the auto stuff fits. As for the crate motor harness, if you want to run it on an LS4... You will have to swap timing covers - the LS4 cam sensor is in the wrong location for all other LS(x) setups. You will need to have a 07+ Gen 4 X58 engine. The combo will need tuned. The harness will be setup for the LS7 style MAF and a 6 wire LS3 TB, so to probably want to swap to those parts. Using the stock LS4 parts will require a connector swap and some jumper wires (8 wire TB unless it is an 08+ engine). The harness will have dual O2's and the LS4 only has a provision for 1. So you will have to add an O2 bung so you have one per bank. The TB, MAF, AC, ALT and starter will all be in the wrong location for the harness, so there will have to be quite a bit of rework to the harness. There might be other connector mis-match issues as well. The harness will need to be reworked to tie into the 203 and 500 connectors as well. As you can, it would be a fair amount of work to use that harness, but reworking the stock harness is quite involved as well - especially it you swap lots of parts like I did. ericjon262 SEP 27, 09:54 PM nice thing about modding a swap harness though, everything is new, and nothing is cut by some asshat at the junkyard. dobey SEP 30, 03:53 PM quote Originally posted by fieroguru: As for the crate motor harness, if you want to run it on an LS4... You will have to swap timing covers - the LS4 cam sensor is in the wrong location for all other LS(x) setups. You will need to have a 07+ Gen 4 X58 engine. The combo will need tuned. If you have a 24x engine, you can swap a few parts to get it to work with 58x. You can swap the whole crank, or the just the reluctor, and the sensor. You'll also need to change to a 4x cam gear and sensor, as the 24x engine has a 1x cam gear/sensor. It might be possible to use the LS4 timing cover, by just flashing the LS4 timing tables to the ECM, or reprogramming by adjusting the values for the different position. But if you're going to do an LS4 swap, I would just start with an LS4 harness that you get with the dropout, if possible. Will NOV 11, 11:21 PM Did you ever get the DoD/AFM to work correctly?