4bangerjp.com
General Forums => The Mess Hall => Topic started by: aka-justin on April 04, 2012, 09:59:54 AM
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Driver side motor mount bolts all sheared off in the block last night. At least it happend in the Home Depot parking lot and I went inside and got some metric M10-1.5x30mm bolts needed. I'm limping on one bolt until I can pickup a buddy's right angle drill and extract the other two tonight. Did some research and looks like this is a common deal. I just order a Brown Dog motor mount kit which uses 6-7 bolt into the motor rather than only 3 the oem bracket uses - it'll be here within 10 days. I'll snap some pics and post them soon. BTW, Karol at Brown Dog is awesome.
http://browndogindustries.com/S2883-1-Jeep-I6-Super-Engine-Mounting-Kit-1-Inch-Motor-Lift.aspx
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Thats for a 4.0l not a 2.5l it will not fit
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I've got a '03 Rubicon now - but I still enjoy this forum though. ;)
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$314 vs $15?
I hate poly mounts. They transmit too much vibrations to the body. If it's a daily driver then I'd pass. Honestly, I'd just replace the mount and be done with it.
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I'm already running the bomb proof more engine mounts. The 3 bolt bracket that attaches to the block is what broke free - the engine side bolts snapped. Brown Dog actually is giving me a discount if I send them the old mounts. I'm basically getting the engine mounts for free. What I really need is the bigger bracket. I also spoke with them, and there's a rubber upgrade kit incase the poly is too rough/loud.
http://browndogindustries.com/search.aspx?find=rubber&page=4
The oem holes is what busted on mine - two upper holes still have broken bolts in them. The other holes should be were the new brackets attach.
(http://www.jeepz.com/forum/attachments/cj-yj-tj-jk/2486d1240154134t-oem-motor-mount-holes-damaged-01-tj-will-bracket-like-bomb-proof-work-enginemount.jpg)
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Then it sounds like a good deal then.
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$250 for the Brown Dog brackets and trade in on the engine mounts
$28 for a drill at HF since no one I know close by has one
$5 in bolts (to fix it for now)
$50 for a 16" Perma-Cool 2950CFM electric radiator fan off CL and $43 for a Derale contorller from Amazon (broke the shrowd when the motor flopped - good reason to upgrade)
$50 on a Cobra CB 29 NW LTD with antenna off CL
$60 in front lower and upper arm bushings - the knocking been driving me nucking futs.
Its another Just Empty Every Pocket month. ;) Glad I got 21 hours of OT. (http://peanutbutterjellytime.net/peanut-butter-jelly-time.gif)
The bolts only needed a light coaxing to get them to come loose. The punch to set the drill bit starting point and the WD-40 I sprayed to save my drill bit really loosened it more than anything. Now, as long as I keep it on four wheels I'll be ok until the brackets come.
(http://lh4.googleusercontent.com/-NyBAjOOCLX4/T30DdRwBQGI/AAAAAAAAClg/J-9SyNZJu_g/s1024/2012-04-04_17-22-46_40.jpg)
(http://lh3.googleusercontent.com/-3ZeG-pfpwbA/T30DdG9JIQI/AAAAAAAAClk/ZvrhgwBjod0/s1024/2012-04-04_17-22-16_446.jpg)
(http://lh6.googleusercontent.com/-amb1pZrMySk/T30Dd1QB-uI/AAAAAAAACls/KXsy8WP9_yM/s1024/2012-04-04_17-25-16_158.jpg)
(http://lh5.googleusercontent.com/-dj9mwj65mHA/T30DeeiqgvI/AAAAAAAACl0/xtCEiGNDFS8/s1024/2012-04-04_18-04-40_948.jpg)
(http://lh6.googleusercontent.com/-OO9EDjQ8gxE/T30DenPKELI/AAAAAAAACl8/yOY8uwq604E/s1024/2012-04-04_18-05-29_604.jpg)
(http://lh5.googleusercontent.com/-d_bvpou986Q/T30DfFTT9YI/AAAAAAAACmI/7TCl0DzGSLs/s1024/2012-04-04_18-46-37_804.jpg)
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Honestly, I'd probably just fix it be done. Also, if you used a reverse cut drill bit it probably would have unscrewed on it's own.
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I just don't want to ever have to deal with that again. Doubling the mounting bolts should make the weak link somewhere else. Everything else were things I was planning on attacking this month. It just unexpectedly doubled.
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Also, I did hear a loud pop launching up onto a path last weekend. I know what the pop noise was... initially. The speed bump must of popped the last bolt. :whistle:
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maybe they broke b/c you have poly bushings. btw, if i'm not mistaking those bolts saying 8.8 are equivalent to grade 5, i think the 10.9 are the grade 8 similar strength (or 10.8, can't remember exactly).
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Probably broke from me driving it stupid. Thanks for giving me the benefit of the doubt. I got that suspension and I have this dumb impression that it'll hold up. :truck:
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My guess is that the bolts might have loosened a little and that's why they snapped off. What grade were the original bolts?
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found this grade chart http://www.k-tbolt.com/bolt_chart.html
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The top of the bolt was 8.8. What matched closest was (3) M10-1.5x30mm, but they were a few mm shorter. 35mm was too long. Thanks for the grade info, I was wondering what the numbers ment.
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The top of the bolt was 8.8. What matched closest was (3) M10-1.5x30mm, but they were a few mm shorter. 35mm was too long. Thanks for the grade info, I was wondering what the numbers ment.
i'm pretty sure the original ones are flange head 10.9 (grade 8 equiv), so maybe that's another reason they broke.
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(http://i7.photobucket.com/albums/y267/taycon9601/smilies/ups.gif)
(http://lh4.googleusercontent.com/-1pEG8PZbhac/T5CmfE2TRjI/AAAAAAAACoc/1LvHyxNYu9Y/s640/IMG_2853.JPG)
(http://lh4.googleusercontent.com/-CvgvLjuZyU4/T5Cmfat-0iI/AAAAAAAACok/sTPlC6Q1OaE/s640/IMG_2854.JPG)
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Glad I got the new motor mounts :yikes: ...
(http://lh5.googleusercontent.com/-V3jypNHPcpc/T5SUJiJizHI/AAAAAAAACpY/2CHY6GNTx_k/s800/2012-04-22_13-05-40_601.jpg)
Went in pretty easy - all things considered. Hardest bolts were the two upper on the driver side. I was able to get them in via the wheel well with a magnetic pickup tool.
(http://lh4.googleusercontent.com/-HQonAszZyLY/T5ST989A1TI/AAAAAAAACp8/SRSJq3FdKJQ/s800/2012-04-22_13-04-57_241.jpg)
(http://lh5.googleusercontent.com/-PKslJM45xEE/T5ST-KBsB5I/AAAAAAAACo4/P-YwwXMdSJA/s800/2012-04-22_13-05-08_991.jpg)
(http://lh5.googleusercontent.com/-hHFFWLOYOow/T5ST-S_vV2I/AAAAAAAACpA/8VWsPoqwElk/s800/2012-04-22_13-05-55_513.jpg)
(http://lh4.googleusercontent.com/-I7KZ1rvDIJs/T5ST-iP9YPI/AAAAAAAACpI/UFANZQ0CGhA/s800/2012-04-22_13-06-09_780.jpg)
Now, cigar time.. :bandit:
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Wow, that really bolts them in! How is it vibration-wise?
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Wow, that really bolts them in! How is it vibration-wise?
No different from before. I had 1" poly mounts before. Maybe it's the extra weight of the 6 cyclinder? but I've never really heard much noise. I would of went with the rubber mounts, but the poly's hold up better in high heat, and it's 100+ summers out where I'm at in So. Cal. I get more noise from the road and tires than anything.
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Thanks
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No different from before. I had 1" poly mounts before. Maybe it's the extra weight of the 6 cyclinder? but I've never really heard much noise. I would of went with the rubber mounts, but the poly's hold up better in high heat, and it's 100+ summers out where I'm at in So. Cal. I get more noise from the road and tires than anything.
The I6 vibrates less then the I4. The extra two cylinders makes for a smoother transition between the first and the last cylinders firing.
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The I6 vibrates less then the I4. The extra two cylinders makes for a smoother transition between the first and the last cylinders firing.
That makes sense. It runs a LOT quieter than my 2.5L YJ did and has the same exhaust.