Duramax Diesels Forum Truck of the Week
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Old 08-02-2018, 05:37 PM
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Default Drivers Motor Mount

So I keep braking the drivers side motor mount. Whats everyone doing to stop this? Hate to spend $400 on a pair of mounts! Did a search and saw where some people were drilling mount and putting a grade 8 bolt in, but were old post. So whats my options?
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2004 Chevy 2500HD CC 4WD LB7, Studded Heads , DTS 67 mm turbo, 10mm Stroker Pump, 45 over injectors, FASS 150, MBRP 3" Downpipe, 4" MBRP Exhaust, DTS Built Trans, Suncoast 1073 Torque Convertor, Tie Rod Sleeves and Solid Centerlink, QA1 Shocks Best 1/4 mile 11.38 at 118mph 60 ft 1.611
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Old 08-02-2018, 05:45 PM
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Many still bolt them. Iíve done quite a few over the past year. Start with a new stock mount though.
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Old 08-02-2018, 05:51 PM
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One bolt or two? I assume put a nut and washer on bolt, should it be tight or leave a little movement?
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2004 Chevy 2500HD CC 4WD LB7, Studded Heads , DTS 67 mm turbo, 10mm Stroker Pump, 45 over injectors, FASS 150, MBRP 3" Downpipe, 4" MBRP Exhaust, DTS Built Trans, Suncoast 1073 Torque Convertor, Tie Rod Sleeves and Solid Centerlink, QA1 Shocks Best 1/4 mile 11.38 at 118mph 60 ft 1.611
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Old 08-02-2018, 06:18 PM
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Default Drivers Motor Mount

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Quote:
Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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Old 08-02-2018, 08:01 PM
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Why not just do the right thing and buy good built mounts? They'll last forever.
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Socal Diesel built bottom end, FI S480 Billet wheel and race cover, RDL Headers and pipes,
Dual Cp3(1 modded and 1 stock), Exergy 100% over injectors,
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Suncoast GMAX-5 plus some billet built by my best friend Dave(He's a Badass like that), 1058 converter, MikeL Cooler
Mag-Hytec pans on Tranny(Scraping a little) and Diff
Custom modified MBRP exhaust i.e. it dumps in front of the rear tire(Also by Dave). Never had a cat
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Old 08-02-2018, 08:05 PM
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Yep, bolted motor mounts are ok if you aren’t ocd, mines bolted and after having MA mounts on my old truck, you can’t really tell mines bolted, other than the motor doesn’t slam when you let out of it. Just spend the money and get good mounts, only gotta spend it once.
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Old 08-02-2018, 08:27 PM
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Because solid mounts cause a lot of vibration and is hard on things. I ran bolted ones for years. Zero issues. Cheap and affective.
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Old 08-02-2018, 10:03 PM
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Quote:
Originally Posted by Ne-max View Post
Because solid mounts cause a lot of vibration and is hard on things. I ran bolted ones for years. Zero issues. Cheap and affective.
What solid mounts are you talking about? I've ran Merchant mounts on both of my trucks for years and your description doesn't fit them whatsoever.
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2004 LB7 EC/LB 2WD Dropped 6" in the front on coil overs and 7" in the rear on 18"s, Hellwig front and rear sway bars. Caltracs traction bars.
Socal Diesel built bottom end, FI S480 Billet wheel and race cover, RDL Headers and pipes,
Dual Cp3(1 modded and 1 stock), Exergy 100% over injectors,
Socal Diesel injector clamps, Socal Stage 2 Heads/ARP Head Studs
Suncoast GMAX-5 plus some billet built by my best friend Dave(He's a Badass like that), 1058 converter, MikeL Cooler
Mag-Hytec pans on Tranny(Scraping a little) and Diff
Custom modified MBRP exhaust i.e. it dumps in front of the rear tire(Also by Dave). Never had a cat
Labonte Motorsports water/meth, AirDog II 200
Custom 5" Intake Pipe w/AFE Filter, BD Cool It Intercooler,
EFI Live DSP5
Torsen limited slip(POSI), Gauges
DON'T PURCHASE FROM INDUSTRIAL INJECTION UNLESS YOU ENJOY GETTING SCREWED!
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Old 08-02-2018, 10:37 PM
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Quote:
Originally Posted by Ne-max View Post
Because solid mounts cause a lot of vibration and is hard on things. I ran bolted ones for years. Zero issues. Cheap and affective.
Yep, bolted mine for this reason. And I was being a cheap ass.
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Old 08-02-2018, 11:34 PM
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How about this thread?

https://www.duramaxdiesels.com/forum...ead.php?t=2976
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Old 08-03-2018, 06:13 AM
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My motor was balanced so I can’t speak for the vibrations, my stock motor LMM vibrates pretty good, so I could see it being an issue with a stock motor, but I personally prefer the solid mounts.

I bolted both mounts on my LLY when it was stock and it was ok, I just did the driver side on my LMM because my dumb ass was tired and in a hurry put one of the bolts too close to the center for the passenger side mount and it wouldn’t fit, so I get a lot of movement still, I have another mount but only time I have issues is in 4x4 going up steep hills around the house.
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05' Black Chevy CC/SB LT- Blackout Performance built motor/trans/tuning- Gone

The Blessed Hellride- 08' White GMC Sierra SLT CC/SB,
100k miles. Piston eater.

Wife's ride- 2016 Pearl white Legacy limited 3.6R

Rig ride/new DD-02' Black Eddie Bauer explorer 4.6, -180k, still sporting original trans, outlasted two Duramaxs.
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Old 08-03-2018, 07:22 AM
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James bolted a stock engine mount for me years ago and I had no problems with it. I run a solid mount on driver side and stock on passenger side on my LS truck and it doesn't move
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Old 08-03-2018, 07:39 AM
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Quote:
Originally Posted by PACougar View Post
What solid mounts are you talking about? I've ran Merchant mounts on both of my trucks for years and your description doesn't fit them whatsoever.
i just hate the added vibration those induce. Its not terrible and some dont mind it but its kind of like poly body mounts vs stock. i tried poly those too and they drove me nuts with the added vib and transfers of sound verse the stock rubber.

just depends on owner. ive always offered either choice in mounts when im working on an engine cause 9/10 times that driver side mount is shot. still waiting for a bolted mount to break but i use a 9/16" grade 8 bolt and it will bend the shit out of the backing plate before it breaks
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Quote:
Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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Old 08-03-2018, 08:54 AM
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Quote:
Originally Posted by PACougar View Post
What solid mounts are you talking about? I've ran Merchant mounts on both of my trucks for years and your description doesn't fit them whatsoever.
I recently switched to merchant mounts on my race truck to help keep engine from twisting and messing up my intercooler boot angles. Witch helped a lot. But now I notice random bolts coming loose and can feel it in the seat (aluminum seats with padding). Like said above. Some people are more picky then others.
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Old 08-03-2018, 10:39 AM
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Bolted drivers mount here. I even went the super cheap route and Por patched my broken one back together when I bolted it
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