Weird Motor Mount - JeepForum.com
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post #1 of 27 Old 03-19-2017, 07:32 PM Thread Starter
iisswift
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Weird Motor Mount

I'm in the midst of replacing my 2.5 motor (250,000 miles!!) with a fresher, rebuilt 2.5. While bolting up the new motor I took a closer look at the passenger side motor mount and made an interesting discovery. Under the mount is what looks like an engine riser. It is rusted and broken and cannot go back in. Now, the issue I've got is that the other side does not have the riser. The body and suspension is stock height so I'm not sure why there would be any risers put in by the PO and really have no idea why it would have been on only one side. Is this a normal thing for the 2.5 motor that I just haven't read about? I want to make sure that if I take the riser out I won't have an issue lining up the new motor later. Any thoughts?

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post #2 of 27 Old 03-19-2017, 08:29 PM
BPritchard95
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Yes, the normal 2.5 uses that piece. It's called a cradle. Personally i would buy a new one as those are notorious for breaking. Brown Dog off-road sells those and they're so strong you'll never have to worry about it again. It's like $40. Check them out.

And yes, it's normal and only on the passenger side. That's just how Jeep decided to do it.
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post #3 of 27 Old 03-20-2017, 01:43 AM
timatoe
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Brown Dog is about a hundred for the set... http://browndogindustries.com/93-95-...r-yj-2-5l.aspx

Ask @Mr.B what happens when that lets loose and breaks on the trail.

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post #4 of 27 Old 03-20-2017, 07:34 AM
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Originally Posted by BPritchard95 View Post
Yes, the normal 2.5 uses that piece. It's called a cradle. Personally i would buy a new one as those are notorious for breaking. Brown Dog off-road sells those and they're so strong you'll never have to worry about it again. It's like $40. Check them out.

And yes, it's normal and only on the passenger side. That's just how Jeep decided to do it.
Yes they do break often. I've replaced mine twice. And yes you need it. The last time I went to Brown Dog. Now I don't worry about it anymore. If you ever manage to break it, he will replace it for free.

This is the part you need:

http://browndogindustries.com/CR2569...e-Bracket.aspx

This is what the stock one is supposed to look like new:




But they just don't last. $40 and guaranteed for life is a good deal.


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Brown Dog is about a hundred for the set... http://browndogindustries.com/93-95-...r-yj-2-5l.aspx

Ask @Mr.B what happens when that lets loose and breaks on the trail.

This is what I broke last year, and it was bad:





This is what I replaced it with:

http://browndogindustries.com/B2569R...ket-Right.aspx


Here's what the engine bay looked like after it was McGyver'd.





I actually drove it home that way.
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post #5 of 27 Old 03-20-2017, 10:59 AM
BPritchard95
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Yes, the Brown Dog bracket and mount kits are very good as well. I have a 4.0 so my stuff isn't quite the same but I did the mount and bracket kit and it's fantastic. I believe if you do that, it comes with the cradle piece we're talking about. That's the route I'd go, save some bucks and get stuff that is true quality.
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post #6 of 27 Old 03-20-2017, 11:32 AM
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Brown Dog motor mounts and cradle for a 2.5L in the wild if you wanted to see. I painted my motor mounts red, but don't tell Tim that...he seems to like the yellow.

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post #7 of 27 Old 03-20-2017, 05:50 PM Thread Starter
iisswift
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Thanks for the replies, all. I'm really surprised that there are so few aftermarket manufacturers making such a common piece that goes badly this often. I guess Brown Dog has got a corner on the market.
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post #8 of 27 Old 03-20-2017, 11:05 PM
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Maybe there are some others out there making them. But its hard to beat the price and guarantee. And no one mentioned the 4 day delivery.

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White '94 YJ 2.5L 5 speed, 35" BFGs KM2's, 5" lift, Mark VII 2 speed fan, Milemarker PE8000, Front Aussie Locker, Power steering conversion, '98 Cavalier seats, MORE Boomerangs in front, 136 amp ZJ alternator, JB conversions SYE, Tom Woods custom drive shaft, 8.8 with ARB, 4.88 gear ratio, Teralow


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post #9 of 27 Old 03-20-2017, 11:24 PM
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Originally Posted by Mr.B View Post
Yes they do break often. I've replaced mine twice. And yes you need it. The last time I went to Brown Dog. Now I don't worry about it anymore. If you ever manage to break it, he will replace it for free.
Why do you need a cradle? My 1988 2.5L does not have one, I did the motor mounts 2 years ago and the mounts that came off of the Jeep did not have it, and the mounts I put on the Jeep did not have it. I haven't noticed anything abnormal with the Jeep.

˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
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post #10 of 27 Old 03-20-2017, 11:29 PM
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Why do you need a cradle? My 1988 2.5L does not have one, I did the motor mounts 2 years ago and the mounts that came off of the Jeep did not have it, and the mounts I put on the Jeep did not have it. I haven't noticed anything abnormal with the Jeep.


1991-1995 2.5 passenger side only.
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post #11 of 27 Old 03-20-2017, 11:42 PM
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1991-1995 2.5 passenger side only.
Oh, you guys had me worried. Do you know what changed in 91 that required it?

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post #12 of 27 Old 03-20-2017, 11:43 PM
BPritchard95
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Should just be a different way it sits on the frame. They did it whenever they switched the 2.5 from TBI to MPFI.
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post #13 of 27 Old 03-20-2017, 11:50 PM
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So did they change the frame, the engine block, the metal bracket that bolts to the engine, or did they just redesign the passenger motor mount? I'm just trying to figure out why they added a piece that seems to be poorly designed, or was there something inferior about the 87-90 design?

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post #14 of 27 Old 03-20-2017, 11:55 PM
BPritchard95
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The frame would have been the part to be changed, because there's a spot where that square portion of the cradle sits. I have no clue why they did it, it only seems to be an unsuccessful change. I haven't heard of 87-90's having issues in their stock setups.
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post #15 of 27 Old 03-21-2017, 08:13 AM
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Originally Posted by Mr.B View Post

Yes they do break often. I've replaced mine twice. And yes you need it. The last time I went to Brown Dog. Now I don't worry about it anymore. If you ever manage to break it, he will replace it for free.

This is the part you need:

http://browndogindustries.com/CR2569...e-Bracket.aspx

This is what the stock one is supposed to look like new:

But they just don't last. $40 and guaranteed for life is a good deal.

This is what I broke last year, and it was bad:

This is what I replaced it with:

http://browndogindustries.com/B2569R...ket-Right.aspx

Here's what the engine bay looked like after it was McGyver'd.

I actually drove it home that way.
That's some impressive McGyvering. We had a motor mount break while in moab 1500 miles away from home. Couple of ratchet straps and we made it home no problem.

Now would also be a time to consider a motor mount lift. If you're lifted more than 2.5 inches or plan on doing that, the motor mount lift helps reduce the driveshaft angle reducing vibrations and possibly the need for a t-case drop. I have the 6 cyl which may be longer so correct me if I'm wrong. Not sure if the the 4 cyl is considerably shorter getting rid of the need for a MML
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