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YOUR RESEARCHBroken motor mount bolt
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Replace 115k original motor mounts
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Performed · outcome unconfirmed · Original poster
Replaced my 115k original motor mounts today with Rein mounts.
Leading evidence: 'Replace 115k original motor mounts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 115k original motor mounts' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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I'd just keep an eye on it until you get it fixed.
Replaced my 115k original motor mounts today with Rein mounts. All went well except I broke the head of the most forward bolt on the passenger side. It�s like 1/8� down in the hole. I went ahead and bolted the new motor mount in with only the rear of the 2 bolts in place. How terrible is this to drive. The weight of the engine pulls the motor downwards and I didn�t think there was really any rotational force on the bolts. I will leave it to a professional to remove , but can I drive it around town and to work? Thank you in advance.
The main bolt that holds the engine has a square head that fits a square cutout in the engine carrier and that would prevent rotation. It is probably OK with two of the three. I'd just keep an eye on it until you get it fixed. How did the head break off? I'm guessing the old one was rusted in place? The torque for the new one is only ~18nm. If the old one was stuck that bad, how did you get the main bolt off?!
I think I understand what you�re saying, but the �main bolt� is part of the mount it does not get removed. It�s 2 bolts on top and 1 nut underneath that are removed. Yes the top motor mount bolt definitely appeared to have rust on the threads from what I could see that broke off. The nut underneath is 60lbs of torque and required a break bar. Definitely gonna get it fixed, just trying to determine if this is an immediate fix or can wait just a bit with only regular driving.
It's fine to drive but like said above fix it when you can. I think the main purpose of those bolts are to prevent the mount from moving vertically.
If you look at the engine bracket with the mounts bolted to it as a single unit you've got 3 out of 4 bolts in place and they don't have anything to do with holding the engine up.
My mistake. Only 2 bolts up top. I thought there were three and I should have known because I replaced mine. You have one holding it in place and one broken. I think you should be fine as long as you stay off the track until you get it fixed.
Mike, I am definitely not disagreeing with you (it�s definitely getting fixed), but help me out what�s your thinking. The mounts do not turn experience rotational force side to side and the massive weight of the engine pulls the mount down into the square fitting. Does the engine go upwards at times? 3 of the four bolts are in place plus the 2 nuts below. I am not being smart *** or questioning just picking your brain as so many of y�all have excellent car knowledge and experience. Thanks for the feedback.
You aren't being a smart *** and your thinking is correct. The weight of the engine and the holes in the chassis the mounts slide down into keep the engine in place.
Kinda, yes, only one side though, since it�s a torque/twisting force. The engine can make upwards of 240 ft. lbs of torque about its axis at the crank, so one side will press down into the chassis and other side wants to come and lift up. I guess there is also an anti-twisting force if one drops the clutch or realizes the clutch so that it jerks and snaps back, especially in lower gears, so that would be the other mount, but with motor mounts, it�s usually one side that takes the brunt of the load.
Your transmission and its mount will also help secure the motor, but it�s going to be much harder on that mount if one of your other motor mounts isn�t doing it�s job because the twisting force is so close to the rotational axis.
Well since it's the passenger side the rotational force is already pushing down on that mount so that's better. Replace the bolt when you can. The mounts are doing their job. Those bolts do a minimal amount of work.
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