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Motor/Tranny Mounts(Matt93GXE,Lboogie)anyone!

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Old Nov 11, 2000 | 05:19 PM
  #1  
Lj90Se's Avatar
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Ok Matt i tried what you said,i gave it gas in drive/reverse..WOW!!my engine tilts back toward the firewall in drive and in reverse it just rattles really bad so now I know its the mounts,my tranny was rebuilt not that long ago should those be replaced or were they replace at that time..what is needed for this repair,how hard is it,what are the part#'s,should I go with OEM or do you guys know of aftermarket ones that are just as good or better,if I need some crazy tools are they ones that can be rented,I live in Miami theres a million tool rental shops here so that shouldn't be a problem..how much of an aproximate cost would these mounts cost,and would i be able to get a discount at courtesy like some people do for other parts
Thanx in advance 4 ur Help
Larry
Old Nov 11, 2000 | 07:30 PM
  #2  
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stay with OEM mounts, as there's only a couple of aftermarket brands, and they cost just as much (or more) than courtesy charges for OEM parts.
the only other thing you could do is fill yours with urethane, BUt the car will be out of comission for a week. most people can't live that long without the car..

I think what I may do (since I've got another set of mounts coming) is to tear mine apart and fill them with urethane, then sell them as an exchange type of thing.. you send me your old ones + $$ , I send you the new urethane filled ones 2 or 3 day mail..
keep in mind this will be probably $150+ as the urethane needed costs almost $30 for two mounts.

back to your problem, usually the tranny mounts don't go bad, but you should check them anyway..
cost on the engine mounts is about $85 each, and I dunno about the tranny mounts.
Old Nov 11, 2000 | 08:00 PM
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hmm
so your engine isn't supposed to move?
Mine when in park and i rev it from under the hood, the front of the engine pushes up and looks like the back pushes down abit. You can definetly see it moving?
i thought it was normal cause the power it has. Think one of my mounts are shot?
Old Nov 11, 2000 | 08:06 PM
  #4  
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Yeah I can't to afford having the car out for a week unless i went on some big mission and drove my sisters car..is it just two mounts if only doing the engine also do you know what the steps are for doing this or do you know of anyone that has preformed this so they maybe help with some instuctions
Old Nov 11, 2000 | 08:49 PM
  #5  
FAST4EN's Avatar
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From: Tyler, TX
Originally posted by Sith
hmm
so your engine isn't supposed to move?
Mine when in park and i rev it from under the hood, the front of the engine pushes up and looks like the back pushes down abit. You can definetly see it moving?
i thought it was normal cause the power it has. Think one of my mounts are shot?
that's right, the engine should move a LITTLE bit, but not so much that it rocks back and fourth. When you do the "reverse/gas" thing, it might move a bit, but if your mounts are broken, then the engine will almost "bounce" off of the mounts. So to make a long story short: If it moves, replace them. Chances are pretty good it's the front mount that's broken so get it fixed anywhere that you trust someone, or replace it yourself, if you are able to get under the car and have a way to lift up the engine (i.e. put a board under it then lower the jack onto it to raise it up a little) then do it yourself and save you the $50-60 labor. The engine mounts are fluid filled, which translates into "costs more" instead of the GM (yea i said domestic...again!) ones which are a bolt on the engine, a piece of metal, and another bolt on the frame. Mine was broken after I got into my accident and I just had my Nissan Dealer fix it.
Old Nov 12, 2000 | 03:09 AM
  #6  
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Originally posted by Lj90Se
Ok Matt i tried what you said,i gave it gas in drive/reverse..WOW!!my engine tilts back toward the firewall in drive and in reverse it just rattles really bad so now I know its the mounts,my tranny was rebuilt not that long ago should those be replaced or were they replace at that time..what is needed for this repair,how hard is it,what are the part#'s,should I go with OEM or do you guys know of aftermarket ones that are just as good or better,if I need some crazy tools are they ones that can be rented,I live in Miami theres a million tool rental shops here so that shouldn't be a problem..how much of an aproximate cost would these mounts cost,and would i be able to get a discount at courtesy like some people do for other parts
Thanx in advance 4 ur Help
Larry
I suggest filling them with urethane instead. Your comparing $20 vs $390 for new engine/tranny mounts. All you have to do is let them cure for about 24 hours. Also you can only do 2 mounts at a time, that is unless you have 2 floor jacks. Here is what you do, order the urethane mix and on friday you fill the engine mounts. Now late saturday nite you install the engine mounts and remove the tranny mounts so they can be filled. Finnally when sunday nite comes you just install your tranny mounts and your car is ready to go monday. Follow the link below for more info http://www.geocities.com/CapeCanaver...r/mounts.html.
Old Nov 12, 2000 | 09:58 AM
  #7  
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Mine does the same thing

The mount closer to the radiator is completely shot, the one in the rear is going too, as for the tranny mounts they couldnt really get a close look but they said those might be shot too. Matt, Tranny mounts usually dont go bad you say? I have a 94 with 140K and I like to drive aggresively once in a while, you think its possible the tranny mounts might be shot too?
Old Nov 12, 2000 | 02:35 PM
  #8  
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Hold on

so what ur saying is that i dont actually need to replace them just refill em with urethane...that would be a hell of a savings,could you plz check the link and repost if possible i really would rather go this way if possible
Thanx
Old Nov 14, 2000 | 12:46 AM
  #9  
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From: Sydney, Australia
Re: Hold on

Originally posted by Lj90Se
so what ur saying is that i dont actually need to replace them just refill em with urethane...that would be a hell of a savings,could you plz check the link and repost if possible i really would rather go this way if possible
Thanx
If they have indeed broken off (i.e. The rubber has actually come apart rather than just fractured or cracked), then I recommend you lay out a little more cash, get new OEM mounts, and then have them filled with liquid urethane. If they've only fractured or they're just old, then fill the bastards up with liquid urethane and don't bother buying new mounts at all.

But I don't agree with leaving them to cure for 2 days, and particularly because you're now closer to winter up there. Flexane 80 (what Matt and I have used on our vehicles) takes 7 days to cure to full strength at room temperature. You can accelerate this by either heating them to no more than 60 degrees C or using an accelerating compound that Devcon (the makers of Flexane) also sell.

Either way, I would make sure they have at least theoretically cured to full strength before putting them back in, and I think Matt can vouch for that. He wanted to get his Max back on the road in 2 days or so because he had something on. Recently (correct me if I'm wrong Matt!!), his mounts disintegrated again. I put it to 2 things ... at least one of his mounts I recall was completely rat****. It was clearly broken up rather than just fractured. Secondly, he didn't let the Flexane cure long enough.

I, on the other hand, was off the road for a while because my gearbox was up at Level 10 getting rebuilt (it takes a while to do this sort of thing when you need to ship it to the other side of the world <grin>), so I had plenty of time 3#-)

I let the mounts cure for about 4 days in front of my gas heater (it was winter for us at the time) and I was monitoring the temperature to make sure it never went higher than 60 degrees C. I did 3 out of 4 mounts - both transmission mounts and just the rear engine mount since there was nothing left to hold the motor and I only had the one scissor jack to keep the motor up there! The front one already has a nice big chunk of rubber wedged in the top air gap which I had done when I boosted my nitrous kit to an 80 shot about mid last year. This was long before I discovered Flexane (thanks to Matt for bringing my attention to this wonderstuff!).

The mounts are still going strong, in a car with 210bhp (soon to be 300bhp with a bigger nitrous shot again). So if you are going to do this, do NOT be impatient and if you have anything that you really want to do with your Max like go out for a long drive or something, get all that out of the way so you don't miss out on your fun and that way you'll take the time required to get it right first time.

Hope this helps dude.

If you want more info, go to my website (the borders are resizeable if the graphics are too big for your screen - I'm working on a 20" monitor here and know NOTHING about making web sites <grin>)...

http://members.optushome.com.au/artstar11/themax2.htm

Old Nov 14, 2000 | 07:28 AM
  #10  
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You'l need to let them cure longer than that.. I let mine cure for over 24 hrs in 110 degree heat this summer, and they still weren't done enough.. I thought they were, but look at my engine mounts now and they're just as bad as they were before I filled them with urethane. I get to do it all over again. fun fun.

The package says to let them cure a WEEK before 100% curing at room temperature. I recommend at least 3-4 days during summer, over a week if it's cold where they are curing.


Originally posted by Nismo87SE
Originally posted by Lj90Se
Ok Matt i tried what you said,i gave it gas in drive/reverse..WOW!!my engine tilts back toward the firewall in drive and in reverse it just rattles really bad so now I know its the mounts,my tranny was rebuilt not that long ago should those be replaced or were they replace at that time..what is needed for this repair,how hard is it,what are the part#'s,should I go with OEM or do you guys know of aftermarket ones that are just as good or better,if I need some crazy tools are they ones that can be rented,I live in Miami theres a million tool rental shops here so that shouldn't be a problem..how much of an aproximate cost would these mounts cost,and would i be able to get a discount at courtesy like some people do for other parts
Thanx in advance 4 ur Help
Larry
I suggest filling them with urethane instead. Your comparing $20 vs $390 for new engine/tranny mounts. All you have to do is let them cure for about 24 hours. Also you can only do 2 mounts at a time, that is unless you have 2 floor jacks. Here is what you do, order the urethane mix and on friday you fill the engine mounts. Now late saturday nite you install the engine mounts and remove the tranny mounts so they can be filled. Finnally when sunday nite comes you just install your tranny mounts and your car is ready to go monday. Follow the link below for more info http://www.geocities.com/CapeCanaver...r/mounts.html.
Old Nov 14, 2000 | 07:36 AM
  #11  
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last time i checked they are NOT fluid filled.
Dan

Originally posted by FAST4EN
Originally posted by Sith
hmm
so your engine isn't supposed to move?
Mine when in park and i rev it from under the hood, the front of the engine pushes up and looks like the back pushes down abit. You can definetly see it moving?
i thought it was normal cause the power it has. Think one of my mounts are shot?
that's right, the engine should move a LITTLE bit, but not so much that it rocks back and fourth. When you do the "reverse/gas" thing, it might move a bit, but if your mounts are broken, then the engine will almost "bounce" off of the mounts. So to make a long story short: If it moves, replace them. Chances are pretty good it's the front mount that's broken so get it fixed anywhere that you trust someone, or replace it yourself, if you are able to get under the car and have a way to lift up the engine (i.e. put a board under it then lower the jack onto it to raise it up a little) then do it yourself and save you the $50-60 labor. The engine mounts are fluid filled, which translates into "costs more" instead of the GM (yea i said domestic...again!) ones which are a bolt on the engine, a piece of metal, and another bolt on the frame. Mine was broken after I got into my accident and I just had my Nissan Dealer fix it.
Old Nov 14, 2000 | 08:17 AM
  #12  
Nismo87SE's Avatar
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Here is an idea.....

Try going to a salveyard and getting an extra set of mounts. Then you could fill them with the urethane mix and let them fully cure. I'm sure those used engine/tranny mounts can be had for like $20-40 each. Looking at the mounts on my dead max, the front engine mount has some separation. However all the urethane is still there, the other mounts are fine.
Old Nov 14, 2000 | 12:10 PM
  #13  
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From: Houston
Nismo.. look in the classifieds section for my post.

Actually, Kaleb is going to hook me up with his old ones, as he changed his last week..
I may start doing the urethane addition as an exchange on other people's mounts- kinda like don's VB mod..

but then again, I dont' have squat for time so you may be the one that gets the job.

are your engine mounts the same as ours? just curious..
if so, I can send you mine when I get kaleb's old ones installed.
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