I am in the process of rebuilding the climate control servo for the wife's '79 300TD. I have 2 servos from which I hope to make one good one. The "good" upper unit, which houses the gear train has a machine screw sheared off at the surface of the plastic housing. Who knew that about 1/4" of screw threads in the plastic would hold well enough to shear an 8X32 screw (even AFTER soaking with PB Blaster!)? Drilling it out did not seem like a good option because of the softness of the surrounding plastic, nor is the blue wrench usable.
Battery acid didn't do much. My next try is a saturated solution of alum with an overnight soak. I have read reports that this will dissolve steel, and I know it won't hurt the plastic. If anyone has an interest, I'll report how it turns out! Greg Fiorentino '85 300SD '80 240D 4 spd. manual '79 300TD (with new crate engine) '95 and '97 Crown Vics '97 F-250HD Crew Cab 7.3 Powerstroke -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of LarryT Sent: Thursday, October 15, 2009 11:41 AM To: mercedes@okiebenz.com; 911/993/996 Subject: [MBZ] Penetrating Oil Test Found this on a MGB list I'm on. Don't know how scientific it is but it seems convincing. Here's some interesting comparisons on penetrating oils. Machinist's Workshop magazine actually tested penetrates for break-out torque on rusted nuts. They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a "scientifically rusted" environment. *Penetrating Oil and Average Load* Nothing..................... 516 pounds WD-40....................... 238 pounds PB Blaster................ 214 pounds Liquid Wrench......... 127 pounds Kano Kroil............... 106 pounds ATF-Acetone mix..... 53 pounds The ATF-Acetone mix was a "home brew" mix of 50-50 automatic transmission fluid and acetone. Note the "home brew" was better than any commercial product in this one particular test. Note also that "Liquid Wrench" is about as good as "Kroil" for about 20% of the price. Take care - Larryt 74 911 91 300D Does your business accept or need to accept V/MC/AE/Dis? We have the best rates & 0% Interest Business loans. Visit: http://www.merchantreferralsolutions.com/A365706 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20091015/19 faea12/attachment.html> _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com