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  #16  
Old 01-13-2003, 12:32 PM
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Join Date: Sep 2002
Location: somerset, ma
Posts: 34
sound damping

greetings, I've been reading the posts for a while and thought I'd weigh in... I travel 500 miles/wk in my 80 240d and at certain highway speeds i could use some earplugs... just highway noise and drone from the drive train. i'll probably try some extra sound proofing but I'm loathe to use anything that absorbs water (my days spent at a new car dealer in the 70's and the smell of wet floor mats backed by felted pads). Anyway, I have had some success with the foam mats of the material used for backpacking. theyre easily cut and don't absorb moisture...no rust underneath. Also there are fiberglass wool mats used for sound deadening in office interior panels. similar material available for supended ceiling panel and then the polyester fiberfill batting at fabric stores.... just some thoughts...cheers, mark
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  #17  
Old 01-13-2003, 01:50 PM
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Join Date: Mar 2002
Location: Western, PA
Posts: 429
is any of that fireproof?
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Paul
1982 300 D turbo, 183,000 mi
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  #18  
Old 01-14-2003, 09:05 AM
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Join Date: Sep 2002
Location: somerset, ma
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paul,
I know the fiberglass mat used in office environments is fire rated. I seem to remember similar mtrls in hood pads though I've been more concerned with interior use as in differential noise.
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  #19  
Old 01-14-2003, 10:05 AM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
MK240d, I live out in the country.... and one thing which can be amazingly loud is the tires themselves hitting the road...
I don't know if tires are rated by noise... but you might check that out and consider , if not different brands, at least different tread patterns.....
If you clean the wheel wells and spray undercoating from one of those aerosol cans it can really help... but follow directions and shake often.. and use old rags bound around the arm and plastic gloves... very sticky and splatters some ... eye protection good thing also....two applications will help build up the thickness.. what counts is how much air you can trap in the mix....
I also have a 1980 240d... is yours manual ?
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  #20  
Old 01-14-2003, 02:59 PM
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Join Date: Sep 2002
Location: somerset, ma
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leathermang,
I've been through that tire thing...vibrating tread on a couple front raintreads, I then transferred them to the rear, and the rear(now on the front) became warn and loud..... talk about quadraphonic sound!! unbearable for a while and i was glad when they wore out. and you're right I think its time to pay attention to the undercarriage and some coating. .... 240 is automatic. I'm presently working on a project car... '83 300 turbo installing a 5 speed manual. about mid way through project...i.e. auto trans out, rr main seal replaced, bad motor mounts fixed, new trans coupled and everything sitting back in place among other things. garage floor is cold about now. cheers, mark
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  #21  
Old 01-14-2003, 04:46 PM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Mark, Are you taking digital pictures of the project ? Lots of people want to know all the particulars on that deal..
And, where did you get your 5 speed ? Is it the early or late model ? The late has it built into one unit I think,,, the early the 5th gear is bolted on to the rear....
Did you get the adapter plate also ? Run into any interesting problems so far ?
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  #22  
Old 01-14-2003, 08:23 PM
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Join Date: Sep 2002
Location: somerset, ma
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leathermang,
here's the story.... I found a 300dt with v minor accident dmge, body v. solid, eng. has 125k car has 235k. engine ran good and trans shifted in place....but it was a turbo and I figured for what I paid for it, I could get my $$ back in parts if it didn't work out. On the drive home I found the trans. slipping. otherwise drove well. After reading up on the trans diagnosis, determined it could be B2 piston, vacuum problem or just plain the end of the line for this transmission. Considered replacing it but after some research and a search at salvage yards I wondered if I wouldn't rather have manual trans. Found the 5 spd in MD. from a 280e and my local pickapart yard had a 240d and 190e i used as donor cars. The 5spd trans. is the newer 1pc case so I had to lengthen the hydraulic line to the slave cyl. and since the TO bearing fork didn't come with the 5 spd, I had to modify the one from the 240 older style trans. basically had to relocate the dimples for the push-rod and fulcrum... heat, a press and a little weld, now it fits and does the job. also had to do some slight internal grinding on the new pilot brg. to fit on the trans main shaft, but it was minor. other than that, pedals, supply lines and transmission mount fit from the 240d. As I said in previous thread eng and trans are back in the body ready to bolt up to the engine mounts. I will have to shorten shift rods, redrill some holes to mount the shfter from the 190e, and shorten the drive shaft. I'll report progress as that happens. I don't have a digital camera...may do the scan thing. the worst of it was dealing with stubborn bolts and things that wouldn't come apart. (pulled the eng. to do the rear mn seal, front seal, timing chain, and rails while I had the opportunity.) had an interesting fix for the stripped oil cooler hose fitting, but thats another subject. till later... cheers, mark Oh, almost forgot, the adapter plate is the same on the 240d and 300dt...same part # etc.... I picked up the bell housing from the 240 in case I wanted to investigate adapting a T-5 trans. from a mustang or something....they're plentiful.
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