I have hit a stumbling block while trying to drop my 2.5 back into my YJ. I had a rusty 94 that I yanked the guts from and I have a 90 YJ 2.5 body and frame it is all going into. I was in the process of dropping the engine in when I found out the hard way that the engine mount brackets are not the same. I am hoping someone has run into this exact problem and found a viable solution for it. Currently the brackets on my 94 2.5 are too wide for the 90 mounting isolators from drivers side to passenger side. The driver side looks like the correct width, but the passenger side is too wide for the isolator.
Does anyone know if the engine mount brackets for an 87-90 2.5 will bolt to a 91-95 2.5 block? Also if so does anyone have any available for sale?
87-90 didn't have one, but in 91 they started using them. the frames are the same, the actual mount off the motors are different IIRC. So, you should just need to put in this cradle.
Unfortunately that won't work because it has a bolt on the bottom of it in the middle. On my 94 frame the passenger side has a hole underneath the frame mount to access that bolt, but on the 90 the same hole is not there on the passenger side. When I ordered the new mounts initially I had to get the ones for my 90 frame.
They are different than the 94. My stock 94 has the same bolt on the bottom where the 90 does not have the bolt on the bottom. I will try to get pictures soon so that will make more sense. Sadly I had the original 2.5 that came out of the 90 and sold it before I had a clue they were different.
You can see the difference a little in this picture for the 91-95. The passenger side one is wider and sits farther out on the frame than on the 90.
I will get some pictures tonight. I was thinking the same thing with the washers, but the only issue then is the passenger side still won't line up with the 90 mount. It looks like the drivers side may line up fine, but either way I will get pictures tonight and it will make more sense than I can describe it. Thanks for the idea.
I am hoping if I cannot find a bracket off a 87-90 (if it will even be the same bolt pattern on the block) that I can drill the 94 bracket and just use it with washers.
I am hoping if I cannot find a bracket off a 87-90 (if it will even be the same bolt pattern on the block) that I can drill the 94 bracket and just use it with washers.
The 87-90 brackets will fit the 94 block just fine, that's the exact thing I did in my YJ. If you can't find some OEM brackets, maybe Brown Dog can make some that will work for you.
The first picture shows the 94 frame under side looking up on the engine mounts. The passenger side has an access hole underneath to get to the nut that holds the plate the isolator mounts to on that side. The difference on the 90 frame is it is solid underneath and there is a small area that would be even hard to get a wrench on.
This picture shows (not well, sorry) the top of the passenger mount on the 90 frame. There is no hole for the plate to go through for the 94 plate and isolator. I know I could just drill a hole and mount it, but I have por15'd my frame and do not want to drill into it if I can help it.
Here is the 94 isolator (left) and the 90 isolator (right) side by side. You can see the plate the 94 sits on where the 90 just bolts directly to the frame.
This is with the driver side bolted in and the transmission mount lined up on the skid plate and ready to be bolted in with the 94 bracket on the block.
and a shot from the front right tire.
Now I am definitely in search of a bracket since I managed to break an ear off the passenger side while wrestling it into place. So if anyone has one they would sell I would gladly take it off your hands.
Hey great news I just ordered a set of frame pylons from AMC 4x4 in Phoenix, they were just 70 bucks, awesome service. So if you are out of luck for some frame phylons like I was then contact them.
If you still have your old motor you should be able to just swap the mounts over. I swapped a 94 MPI 2.5 into my 88 and just had to take the mounts from my old motor and put them on the 94 for it to bolt right in.
Go with Brown Dog! Have bought brakets and mounts for both the jeeps I've owned. Best quality out there in my opinion. I personally was blown away with the heavy duty quality. All of thier products rock and you can't go wrong. Best customer service ever as well. Keep on rockin Brown Dog.:2thumbsup:
I had the front yoke of the rear ds hitting the floor. Replacing the motor mounts with Brown Dog mounts I found the culprit. The broken motor mount bracket.
Because guys who have a cradle break want to buy a direct replacement, rather than a whole lot more for more money. To my knowledge, we are the only one who makes them since Chrysler quit. It is not a big seller, but when you need it, you need it. Our parts were all designed to fit into the original system design.
Did the recommended bracket removal. It was tight around the 2 studs. Little help from a pry bar, it broke away. Added anti seize and removed some of the aluminum-steel corrosion in the bracket. I did have to use all 6 washers to center the mount in the bracket. The adapter plate is not square to the motor mount but is square to the frame mount. It's all together and running. No banging of the rear ds to the floor.
Thanks.
The misalignment of the mount to the cradle usually indicates a problem with the transmission mount. Likely the transmission mount is too far forward (or broken).
Well.................ditto here. I bought a 95 YJ that was hit on the passenger side and had a bent frame. So, I purchased a frame from the wrecking yard, it was sold as a 95 YJ frame. I started the swap pulled the frontend off then the motor, tranny and tub. That's when I noticed the passenger side motor mount tower was different then the frame I just purchased. The motor mount tower had an extra block on it. Well I ran the VIN and found out the frame was off a 89 YJ. I called the wrecking yard I told the guy that the frame was not a 95 but a 89 and they don't fit. He apologized saying he thought a all YJ frames were the same and was going to do some research on it and get back with me. The motor mounts appear to be the same on a 89 and a 95 as I have the old ones the came on the 89 frame. My question is the only thing that needs replaced is the passenger side engine bracket (the bracket the bolts to the engine block)? I figure if the driver's side bracket should be the same as the 95. If it is any shorter or longer it is going to misalign the tranny to differential. So my thinking, the only thing that needs to be changed is the passenger side bracket. I'm I correct?
Advance auto sells complete motor mounts for $20 each.
They actually had 1 in stock when I did mine got thè other the next day.
They're not brown dogs but work in a pinch and are identical to OEM's.
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