7.3 Motor mount replacement Q's
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
7.3 Motor mount replacement Q's
Who's done them, and how did you do it?
I was under the impression you had enough space to lift the motor as it sits to gain the room needed to do the swap. I did not have that kind of success.
I removed the 4 large 21mm (L&R) nuts securing the mounts to the cross member, loosened the 2 drivers mount 13mm bolts, I removed the 2 tranny mount 21mm nuts, I was only able to raise the engine a few inches. When I let it rest back down, it did not settle into the same place, I had to raise the pass side to re-center the engine back on the cross member. For now I just put it all back together.
It looks like from what I'm reading and seeing, the CAC pipes have to come off, the spider has to come off, possibly the starter, and front drive shaft too for jacking blocks Etc. And maybe the the transmission cross-member should be removed and the tail supported separately?
Funny, I only found instructions in the shop manual for the 5.4, and V10 mounts. I posted in the Excursion forum too, which is home...
I was under the impression you had enough space to lift the motor as it sits to gain the room needed to do the swap. I did not have that kind of success.
I removed the 4 large 21mm (L&R) nuts securing the mounts to the cross member, loosened the 2 drivers mount 13mm bolts, I removed the 2 tranny mount 21mm nuts, I was only able to raise the engine a few inches. When I let it rest back down, it did not settle into the same place, I had to raise the pass side to re-center the engine back on the cross member. For now I just put it all back together.
It looks like from what I'm reading and seeing, the CAC pipes have to come off, the spider has to come off, possibly the starter, and front drive shaft too for jacking blocks Etc. And maybe the the transmission cross-member should be removed and the tail supported separately?
Funny, I only found instructions in the shop manual for the 5.4, and V10 mounts. I posted in the Excursion forum too, which is home...
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Are you current mounts broken or sending engine vibration into the cab? When I did my engine at 105k, the mounts were replaced then, but the originals were still in good shape. I only replaced them as a matter of routine, but the rubber buffers weren't even starting to crack yet.
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
They are good as far as I know, body mounts are needed more than the motor mounts. I'll get to those later. I just wanted them replaced. I probably have to follow the guidance in this only video I found to get them out.
Cargo Master
Joined: Sep 2015
Posts: 2,860
Likes: 365
I've been curious about this as well as my truck vibrates more than it should. Is this difficult to do with engine in the truck? OP please circle back if you do replace them, would like to know if the mounts have any bad spots that you couldn't see when they were in place.
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
Right now it's difficult, because I'm not doing the swap correctly. Once I have time, and no camping trips planned, I will remove whatever I see in my way, and go from there. A small reason that led me to replace was sometimes when I turn the truck off, I recently get a knock/clunk, kinda like when the engine rests but gives a little feedback stopping partially on a compression stroke. So I thought just do motor mounts and see where that leaves me.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Right now it's difficult, because I'm not doing the swap correctly. Once I have time, and no camping trips planned, I will remove whatever I see in my way, and go from there. A small reason that led me to replace was sometimes when I turn the truck off, I recently get a knock/clunk, kinda like when the engine rests but gives a little feedback stopping partially on a compression stroke. So I thought just do motor mounts and see where that leaves me.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,813
Likes: 1,335
From: Elk Grove, CA
I've been lurking FTE for a dozen years. Nobody ever has broken motor mounts. Never.
Start at the beginning with the symptoms so we can help diagnose.
Start at the beginning with the symptoms so we can help diagnose.
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
That may be. I have a spare transfer case I'm going to do a full rebuild on, chain, seals, bearings etc, I will have the opportunity to look over the tranny then, which is 7 years old now
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
Super Moderator
Joined: Dec 2011
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If you change yours, and take a lot of good photos and offer your advise on how you did it, we can put your write up in the Tech Folder, as we will finally have someone who has.
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
I think that's what we are trying to tell you... we simply haven't seen anyone find the need to change their motor mounts in a 99-03 7.3L.
If you change yours, and take a lot of good photos and offer your advise on how you did it, we can put your write up in the Tech Folder, as we will finally have someone who has.
If you change yours, and take a lot of good photos and offer your advise on how you did it, we can put your write up in the Tech Folder, as we will finally have someone who has.
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Cargo Master
Joined: Nov 2017
Posts: 3,107
Likes: 540
From: Rock Hill, SC
I'll re visit mine soon, I'm in need to reorder CAC boots, I replaced them with OE a few years back, but they are spongy, so aftermarket it is for them.