Replace motor mounts???

[Squirrelsmith]

Anyone done it with the engine in?

 

[cmc76]

Not on a tahoe. But yes. Unbolt the mount. Floor jack under the oil pan. But block it to distribute the weight.

 

[drakon543]

sort of yes
was replacing the engine on a Silverado 5.7 and the owner decided to change the engine mounts after we had set the engine in place. it was a pain but possible but it was also a while ago so i dont remember enough to give you direction.

 

[iamdub]

Pull the front wheels and work at 'em through the wheel wells and from underneath.

 

[Squirrelsmith]

Im going to do it at a friends that has a engine hoist, does that help me?

 

[iamdub]

Im going to do it at a friends that has a engine hoist, does that help me?

Personal preference, I guess. IMO, unless you find a convenient place to hook the chains, jacking it up from the bottom is about as easy as you can get. I don't like putting much pressure on the oil pan, but if you spread out the load with a piece of 2x6 instead of putting the jack's pad directly on it, you should be ok. There's absolutely NO reason to pull the motor. You only need to lift it high enough to slip the mounts out and in. I go until the distributor just makes contact with the firewall. This provides more than enough clearance.

 

[Squirrelsmith]

Personal preference, I guess. IMO, unless you find a convenient place to hook the chains, jacking it up from the bottom is about as easy as you can get. I don't like putting much pressure on the oil pan, but if you spread out the load with a piece of 2x6 instead of putting the jack's pad directly on it, you should be ok. There's absolutely NO reason to pull the motor. You only need to lift it high enough to slip the mounts out and in. I go until the distributor just makes contact with the firewall. This provides more than enough clearance.

Right on thanks

 

[Squirrelsmith]

This sucker look like its moovin a lot?

 

[iamdub]

This sucker look like its moovin a lot?

I don't remember how much the stock mount would flex, but it surely doesn't look broken/completely separated. Maybe worn and stretching at most. If it were broken, the engine would hop up when you jabbed the throttle then slam down when you let off. Unless you're not jabbing the throttle sharply enough for it to lift.

 

[willxfs]

I changed the motor mounts out on my 1998 rig about 4 years ago. This is what they looked like. I dont recall how much movement there was but the engine was out for an overhaul. I bought the energy suspension polyurethane inserts for the clam shells. Also did the transmission mount at the same time. I just couldn't bring myself to buy the cheap Chinese aftermarket mounts so I spent the money on the energy suspension ones...

 

[OR VietVet]

This sucker look like its moovin a lot?

That does not look like a bad motor mount to me. What did it do when you shifted to reverse and throttled it? Plus, I would hit the throttle a bit harder than that as well.

Also, is your fan shroud off in anticipation of the mount replacement or just to check in case was bad and fan may have hit the shroud?

 

[Squirrelsmith]

That does not look like a bad motor mount to me. What did it do when you shifted to reverse and throttled it? Plus, I would hit the throttle a bit harder than that as well.

Also, is your fan shroud off in anticipation of the mount replacement or just to check in case was bad and fan may have hit the shroud?

I took it off doing some work and just never put it back on

 

[Squirrelsmith]

If its not a bad mount i wont be mad it did it, i'll just keep moving down the list haha

 

[OR VietVet]

Unless you can get a good light in there and see where it may be coming apart but not bad yet, then I would not worry about it. But, check it with a harder accel on the throttle and both directions. Look at the trans mount while you are getting dirty. Since you are looking all over for mount problems it is not a bad idea to look at all the wiring grounds hat seem to cause a bunch of crazy ghost problems.