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Joined: Sep 2002
Posts: 3,632
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2002
Posts: 3,632 |
Originally posted by Baby SHO:
My SVT "survived" 140,000 miles without a DMD.
Wonder how long it could have been?
"Cobb - It's not just for corn anymore!"
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Joined: Aug 2000
Posts: 1,128
Hard-core CEG\'er
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OP
Hard-core CEG\'er
Joined: Aug 2000
Posts: 1,128 |
Originally posted by MotorCity:
Originally posted by Baby SHO:
My SVT "survived" 140,000 miles without a DMD.
Wonder how long it could have been?
oh Baby Sho, I didn't know your duratec died, my condolences.
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Joined: Jun 2000
Posts: 1,469
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Jun 2000
Posts: 1,469 |
Originally posted by FlechaAutoSports:
How old is the Contour now..98+ I think there are a few people with tons of mileage on them, me for one. Has anyone ever had their V6 duratec contours blow up specifically due to either the stock dampner or UDP?
Yes, no, maybe..
1) it is clear that crank whip occurs with stock damper...
2) the DMD was designed to reduce it...some say for longevity, some say for NVH (I mean, what is causing the vibration that is cured by adding mass to the crank?)
3) Some experts believe (and some do not) the majority of the spun bearings are due to crank whip...
4) So maybe MOST/ALL cases of spun bearings (at least 30-50 have been reported on CEG alone over last 3 years...several a less than 100K miles)....OR maybe not..
5) UDP may be no worse than stock (or it may)...but stock may suck
6) If 49% of Duratecs fail before 100K miles due to crank whip....then the "majority" will say "I had no problem".
Again, this is for people just tuning into this issue. Many of us have hashed this out and decided long ago.
1999 Amazon Green SVT Contour (#554/2760)
"People demand freedom of speech as a compensation for the freedom of thought which they seldom use."
-Soren Kierkegaard (as posted by Jato)
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Joined: Aug 2000
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Hard-core CEG\'er
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seriously though, is there any documented engine failures due to a stock/udp crank pulley, I really want to know, not just being sarcastic.
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Joined: Apr 2002
Posts: 1,420
Hard-core CEG'er
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Hard-core CEG'er
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I think the DMD pretty much SUCKS , im going to ditch mine ASAP ... "
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Joined: Aug 2000
Posts: 1,128
Hard-core CEG\'er
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Hard-core CEG\'er
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Originally posted by --CitatioN10--:
I think the DMD pretty much SUCKS , im going to ditch mine ASAP ... "
 
your just wanting to start a war here.. don;t you dare get my thread lock or tossed..lol.
Eric
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Joined: Apr 2002
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Hard-core CEG'er
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Hard-core CEG'er
Joined: Apr 2002
Posts: 1,420 |
HAHA, well im not cutting anyone down , Im just expressing my opinion , and that is the DMD sucks COMPARED to the UDP ......OK the DMD might be good but not for me.
Just like with a girl , might be nice to wear protection ?!
BUT you all konw its a heck of a lot better without !
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Joined: Jun 2000
Posts: 1,469
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Jun 2000
Posts: 1,469 |
Originally posted by FlechaAutoSports:
seriously though, is there any documented engine failures due to a stock/udp crank pulley, I really want to know, not just being sarcastic.
I really was not being sarcastic....I think it is an unknown.
Basically, if bad crank harmonics WAS a problem, the main or rod bearings would presumably be damaged and spin. But I do not know that it is possible to tell from engine tear down WHY bearings spin. Low oil pressure may give a similar pattern of bearing wear (because crank whip really results is misdistribution of the oil film). There were changes made to later Duratec oil systems as well as the DMD and oil starvation issues may play a role. About 2 years ago, I thought it was all oil starvation and did some research & took a pole on CEG. Only about 1/3 of the spun bearings occured in setting where you would expect starvation..low oil or hard right turn. Now, maybe the damage occured earlier and was not associated wth events at the time. Soon after, Judge (who work at the OEM damper supplier) reported engines were lost on the test stand (with controlled oil delivery) and that crank whip was suspected..which ultimately resulted in the DMD.
So anyway, thats what I have learned & hope I got the details right. Judge/other correct me if I am wrong.
Bearings do spin in Duratecs..just not clear if it is crank whip, oil starvation, or as one CEGer has proposed the weak nature of PM rods.. Personally, I think a combination..crank whip in some cases, others seem clear cut oil starvation. But, thats is speculation...and I conceed it is possible that DMD will not protect engines. But, there are other ways to improve revability without lossing the DMD. I have the aluminum P/S steering pulley (1 pound lighter and 15% underdrive..makes a noticable dif..also UD alt pulley avail and electric H2o pump..though expensive0
Last edited by Dan Nixon; 04/02/03 08:23 PM.
1999 Amazon Green SVT Contour (#554/2760)
"People demand freedom of speech as a compensation for the freedom of thought which they seldom use."
-Soren Kierkegaard (as posted by Jato)
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Hard-core CEG\'er
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Dan I meant I wasn't being sarcastic not you. Anyways all in all I'm happy with my choice.
Thanks,
eric
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Joined: Apr 2002
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Hard-core CEG'er
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Hard-core CEG'er
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Same with me , I happy with my desision of tossing this DMD crap ...Now i got to get a UDP !
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