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Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 7th, 2015, 6:54 am
by Burnsmacdonald
Hey guys
Need some quick help here.
I am in the middle of a swap of the original 2.5L 4 cyl engine in a 98 TJ, replacing it with a 4.6 stroker engine.
I had assumed that because the 4.0L was an option that year that it would be a straight bolt-in. But now that the 4 cyl is out, it appears that the mounts are in a different location on the frame.

Has anyone run into this before and, if so, what is the easy standard fix?

Everything is at a standstill until I can figure out the best way to resolve this, short of buying a donor TJ and cutting the mounts off it and welding them on mine.

Suggestions/solution?

Thanks

Burns

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 7th, 2015, 7:59 am
by jeepman
You need to cut off the 2.5L frame mounts from the frame and weld on the 6Cyl Frame mounts or build them if you do not have the replacement frame mounts for the 6Cyl Engine...

That's as simple as it can get...

I have done this many times for YJ's but Not TJ's but its basically the same procedure...

Good Luck

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 7th, 2015, 9:10 am
by jeepxj3
No one tells you about the motor mounts when they say, 'just pull the 2.5L and replace it with a 4.0L' or 4.6L in your case.

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 13th, 2015, 1:08 pm
by Burnsmacdonald
Thanks Guys
Just moved mounts. Need a bit of fab as there is a slight difference in protrusion length from frame. Engine is now in. Doing final hook ups and sending driveshafts out for length mods.
Hope to fire up today (fingers crossed)

Burns

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 13th, 2015, 2:32 pm
by jsawduste
We expect a detailed report of first life.

Yes this the same SOB from PBB.

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 13th, 2015, 6:58 pm
by Burnsmacdonald
LOL

Thanks, will do.
Didn't get fired up today. We'll see what tomorrow brings :roll:

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 16th, 2015, 12:49 pm
by Burnsmacdonald
Ran right away on start!!
Smooth idle, snappy response. No bad noises.
I am a very happy (and relieved) camper.

Need to install new driveshafts - road test on Saturday - results to follow. :banana: :D

Thanks to all for their advice

Re: Need Motor Mount advice for 2.5 - 4.6 stroker swap

Posted: July 16th, 2015, 6:25 pm
by jsawduste
:cheers: :worship: