Anyone put a 4.0 in a 3.9/3.5 disco?

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Author Message   Ron Posted on Wednesday, March 13, 2002 - 01:08 am:    Got a line on a new disco II 4.0 LONG block. want to swap into my rangie. What is the list of stuff I need? Cam mod is my main concern. Ron   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 01:28 am:    Ron- Will the new engine be serpentine or are you staying with the v-belts? -4.2L camshaft -3.9L disco front cover(for dizzy drive) -You'll need to manufacture a spacer for the crank, so the lower timing gear will line up. -Give it a little more fuel. ie.. 4.2L coldstart eprom and 4.2L fuel rail. -Two new style motor mounts These are the very basics, depends on your defenition of 'long-block'. any ancillaries on it? or is it just bottom end and heads? Are you planning on using the 'THOR' components? etc... Craig   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 01:30 am:    Oh yeah- When installing the new cam, you'll need to do new lifters as well. Craig   Ron Posted on Wednesday, March 13, 2002 - 01:31 am:    The land rover long block. I would like to keep the V-belts. Can I reuse the 3.5 front cover, fuel rail etc? Ron   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 01:36 am:    Due to the difference in crank lengths from a 3.5 to 4.0, you'll need the later front cover- Don't see a problem with the 3.5 fuel rail, although not the best option. The only real pain in the whole job, is spacing the lower timing gear. Craig   Paul T. Schram (Paulschram) Posted on Wednesday, March 13, 2002 - 10:00 am:    If one swaps out the wiring harness and ECU, could you put the 4.0 in as is? Paul   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 08:37 pm:    No Paul- Craig   Paul T. Schram (Paulschram) Posted on Wednesday, March 13, 2002 - 09:06 pm:    OK, what's it take to put a 4.0 GEMS engine into an earlier body? Paul   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 09:07 pm:    $$$$$$ Craig   Craig M. Highland (Shortbus) Posted on Wednesday, March 13, 2002 - 09:13 pm:    Seriously though Paul- I wouldn't want all that GEMS crap on a trail rig. Keep It Simple Stupid- Craig   Norm Posted on Wednesday, March 13, 2002 - 10:18 pm:    Check the RPi website -- their whole business is built around making these conversions. You may need a chip from them to make it run right. You'll probably need to use your old oil pan and pickup tube and "relieve" the inside of the sump to make room for the larger crank journals of the 4.0. ---Norm   Ron Posted on Wednesday, March 13, 2002 - 10:39 pm:    At this point I am looking at maybe just doing the little work the 3.5 needs Too much effort for a truck that won't support the investment. I think I will just send the heads out, pop in some new rings and main bearings and put it back together. Ron   ERIC Posted on Thursday, March 14, 2002 - 08:30 pm:    I NEED HELP HERE GUYS/GIRLS I HAVE A 4.0 WITH 85K ON THE CLOCK AND I NEED A VALVE JOB DONE AND SINCE THIS NEED ATTENTION I WANT TO PULL THE ENTIRE MOTOR OUT AND HAVE IT REBULD PROBLEM IS I CAN NOT FIND A GOOD SHOP THAT DOES THIS I AM IN THE PHILDELPHIA PA. AREA AND NEED ANY HELP AND RON IF YOU DONT DO THE SWITCH LET ME KNOW OF THE 4.0 IF ITS FOR SALE.. MAYBE JUST SWAP IT OUT.. THANKS AGAIN ERIC   Ron Posted on Thursday, March 14, 2002 - 09:33 pm:    Eric, I can help I am in your area. I have tons of experiece with the dreaded valve job. Email me. evilfij (at) yahoo.com Ron   Alex Posted on Wednesday, March 20, 2002 - 11:55 am:    Hey Eric Just tell the shop that you have a 63 buick 215 V8 thats bored out. They will have the parts! Including the valves and guides. Probably just need to be cut and lapped anyway if at all! Key is a "GOOD" machine shop. For what most of those guys are capable of, they charge way too little.