Broken Motor Mounts
- Thread starter osidesurfer365
- Start date
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That says it’s ACDelco. But you’re AWD and doing “WOT runs from a dig” so I feel we just found out why you broke it. You’re getting zero forgiveness as far as wheel spin so you broke the weakest link. Lucky it wasn’t the trans, transfer case, or something else expensive. I learned to quit doing that with my 02 after a added a blower. A rolling start is your friend before mashing it to the floor.
Meccanoble
Full Access Member
No pics as they are still on the car but i did the brake/gas test and definitely feel engine jump in D, nothing serious in R
Meccanoble
Full Access Member
I never drive in AWD nor AUTO, always 2WD especially in the south where we barely have snow/bad weather.
Even so, I should not do WOT runs from a dig? How do people at the track race? I always avoided WOT at a dig because I was always scared of my mounts but when I got the H3, I thought I was fine. If there is that much concern about WOT at a dig, I'll avoid at all costs but didnt know it was a non recommended thing, especially on a stock truck.
Meccanoble
Full Access Member
My solid motor mounts literally just came in 15 minutes ago! So question before I decide to install or get another H3 set.
1) Will solid mounts give me the ability to do WOT digs without worrying about the engine flying out? Once again, I'm stock and rarely would do WOT because I'm cheap and love to save gas but having the ability plays a key role in taking the bad with the good.
2) What other harms am I doing to the truck with WOT digs?
When I had an E46 M3, they did not suggest WOT digs because of the weak subframe
1) Will solid mounts give me the ability to do WOT digs without worrying about the engine flying out? Once again, I'm stock and rarely would do WOT because I'm cheap and love to save gas but having the ability plays a key role in taking the bad with the good.
2) What other harms am I doing to the truck with WOT digs?
When I had an E46 M3, they did not suggest WOT digs because of the weak subframe
Thought you were AWD which to means full time otherwise it’s 4WD. People at the track usually run solid mounts or use a chain on the driver side so it can’t lift too far. At least that’s how we used to do it back when, I haven’t been around that scene in 30 years or more. You should be breaking the tires loose before breaking motor mounts in 2WD especially without a lot of power adders even with a heavy ass SUV. Weird.
Your motor mounts will be fine but it’s still a heavy vehicle so you’re going to be ******* the entire drivetrain if you do a lot of that. U-joints, driveline, diff, tc, transmission will all be tested. What trans do you have?
Meccanoble
Full Access Member
6L80 6 speed
Good, you shouldn’t have to worry about that anyway. Those will take a lot of power and abuse unlike a stock 4l60.
Meccanoble
Full Access Member
I just remembered that I did these runs with traction control on. Maybe thats why?
Meccanoble
Full Access Member
I'm at a crossroad. I want to replace this thing 1 last time but stuck with 2 options:
1) Install H3 mount again and be more responsible and hopefully not worry about mount in a while.
2) Install solid mount and never worry about replacing a mount again but feel the vibration like Markie Mark.
1) Install H3 mount again and be more responsible and hopefully not worry about mount in a while.
2) Install solid mount and never worry about replacing a mount again but feel the vibration like Markie Mark.
Vibration with solid mounts is only at idle. Driving around its not noticeable. I went to H3 from solid only because it didnt pass the wife test. If the H3s fail I'm putting the solids back in and will "ask her kindly" to live with it.
gooffeyguy
Tom
I remember doing that....lol
I used a turnbuckle on mine so I could adjust it. Ran from an engine lift plate that was attached to the front header primary bolts down to the K member.
Meccanoble
Full Access Member
I'm scared mine will fail the wife test as well. I seen a video of a silverado running solids and I could see the difference along with a little extra noise? I wish you or someone could go into more details or video of how bad it is. Whatever goes in next will probably not get changed lol.
Meccanoble
Full Access Member
Question regarding SOLID motor mounts....there is a screw in the middle connecting the 2 pieces (1 side to engine, 1 side to body). How much tq needed to tighten that bolt?
randeez
Full Access Member
im guessing you mean the atomic poly mounts?
i wouldnt try and mount each to engine and frame and then line up and put the bolt thru the middle.
make the mount up out of the truck, put the bolt thru the middle. it's a 1/2" bolt iirc put 65ft lbs or so on it - you could prob put 100 on the thing and its still going to hinge. bolt it to the engine first and swing it down and bolt it to the frame with the three stock bolts.
i wouldnt try and mount each to engine and frame and then line up and put the bolt thru the middle.
make the mount up out of the truck, put the bolt thru the middle. it's a 1/2" bolt iirc put 65ft lbs or so on it - you could prob put 100 on the thing and its still going to hinge. bolt it to the engine first and swing it down and bolt it to the frame with the three stock bolts.
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Meccanoble
Full Access Member
I slapped mine in with the bolt already through the middle. It's hinged so just fold a bit and bolt in tight enough.
Any regrests? Videos of the vibration? My dash is cracked in multiple places. I can see vibration being a bigger issue on this truck because of that...
iamdub
Full Access Member
With how much I WOT mine, I'm still surprised you broke an ACDelco H3 mount so soon. Granted, I don't do many WOTs from a dig (no reason to), but still.
I also don't see how poly mounts wouldn't appeal to you guys' wives. I thought they liked that sort of thing. I guess an "O face" while being stuck in traffic could be a distraction for them, though.
I also don't see how poly mounts wouldn't appeal to you guys' wives. I thought they liked that sort of thing. I guess an "O face" while being stuck in traffic could be a distraction for them, though.
I dont need the competition.
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