pulling motor in a 1999 jimmy,? is do i leave the manifolds on or off when im pulling motor out of its cage?i bought a knew rebuilt long block from michigan motors for 1700 3 year or 250000 mile warranty,these trucks are a bear to change motors, this is my first 1, i have a buddy of mine that did 8 of them last winter,he had a hoist!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!lol

 

It isn't necessary to remove the manifolds from the engine, but you can if you cannot get the y-pipe loose from them. Manifolds are fairly cheap too so if you break something, I wouldn't mess around too much trying to "fix" it.

 

thank you for your response,that means its ready to come out but i dont know where to put the chain to pull it out from? any suggestions? thanx again.

 

I just pulled the motor out of my '97 this last weekend.

We hoisted with a chain attached to the driver's side front loop and an exhaust manifold bolthole in the head at the rear on the passenger's side.
I didn't pull the tranny, nor did I undo any of its crossmembers or the driveshaft. The tranny drops plenty without support, in fact I have it jacked up right now to keep it off of the front driveshaft.
I jacked up the motor and removed the motor mounts, then dropped as far as I could without letting it rest on the diff and axle. This allowed me to get the top 2 bellhousing bolts, (driver's side, not fun to get to) one of which was only accessible by hand + box end wrench, but it sure beats putting the tranny back in in my opinion. I believe we removed 9 bellhousing bolts in total.
I removed the exhaust mainfolds (I didn't want to mess with the steering column) and the distributor. I should've removed the oil pressure switch, as well as disconnect the fuel lines behind the head. They both had a hard time on the way out.

Due it being a 4wd, the diff and axle are in the way of it moving forward more than a few inches but it's enough. I'd try rolling the motor forward over the axle, to clear the crap at the back, and then lift straight up. YMMV.

Good luck, and just remember that it'll be worth it when you have a new motor in. I had to remind myself of that fact many times during the pull.

 

thanx 4 the info dave but did the chain rub on the valve cover on the passanger rear?i need to reuse the valve covers on the knew long block,thanx again

 

It didn't move enough to mess with it, no. I'm planning on reusing them as well.