new mm report
06-09-2010, 09:32 AM
#61
Rennlist Member
JWillman,
'79 model 928's have a complete different MM (unless you or the PO have changed them out) Yours should be a big square block of rubber mounted in a steel cradle. They DO go bad, but the typical repair (from what I've heard) involves drilling a hole and using a long bolt and nut, and not replacement.
'79 model 928's have a complete different MM (unless you or the PO have changed them out) Yours should be a big square block of rubber mounted in a steel cradle. They DO go bad, but the typical repair (from what I've heard) involves drilling a hole and using a long bolt and nut, and not replacement.
Are the symptoms of a worn MM on the 1979 as pronounced as on the newer style MM cars?
Landseer,
I havd forgotten about Sharkskins write up showing the MM. Thanks for reminding me.
I have read so many threads in the last couple of months that the challenge is remembering what is out there and developing a good system to manage the links so I cxan find it again!
Last edited by jwillman; 06-09-2010 at 11:43 AM.
06-09-2010, 10:56 AM
#62
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When the Ford MM were first discovered to work there were the typical doubting Thomas'. People kept trying them because of the huge cost difference. As time went by they proved to be more than adequate. Then the manufacturer was bought by someone else and the quality went to hell. The quantity of rubber was cut in half and they would no longer support our engines.
After getting no support from the manufacturer Roger, to his credit, found a replacement. Also to his credit he warranted the failed mounts with free replacements and in Jeff's case free replacement labor.
The best replacement happened to also be hydraulic. The weight of the original application is very close to the 928 application so they should work fine. They are both hydraulic, they both will most likely fail over a period of years. Just like the first Ford MM's only time will tell if this is a good substitute, but if no one is willing to try we will never know. So it comes down to; Do you want to spend $500.00 for two mounts from Porsche or $92.00 for Roger's mounts.
I intend to save the $408.00 for something else. YMMV
After getting no support from the manufacturer Roger, to his credit, found a replacement. Also to his credit he warranted the failed mounts with free replacements and in Jeff's case free replacement labor.
The best replacement happened to also be hydraulic. The weight of the original application is very close to the 928 application so they should work fine. They are both hydraulic, they both will most likely fail over a period of years. Just like the first Ford MM's only time will tell if this is a good substitute, but if no one is willing to try we will never know. So it comes down to; Do you want to spend $500.00 for two mounts from Porsche or $92.00 for Roger's mounts.
I intend to save the $408.00 for something else. YMMV
+1 I am going to install these mounts as see how it goes. Can't beat the price point in my opinion. 5 sets of these vs one set of Porsche mounts. Event if I change them in two yrs.; not that I want to do that!