PSK install....Which Helicoil thread repair kit I need?
04-07-2011, 12:08 AM
#1
MBWorld Fanatic!
Thread Starter
PSK install....Which Helicoil thread repair kit I need?
OK I'm in the last month prior to my C32 coming out of hibernation hungry for V8s and dragway days but I'm at a bump in the road I plan to install a PSK=pulley saver kit because of a seized bearing(idler I believe) anyway I need to know anyone that has changed that before(idler that is) what's the size of that bolt? I wish to repair the threads if it needs it but I don't know which helicoil(thanks Splinter) to buy...here are my choices...TIA
http://www.google.com/search?aq=2&oq...a8401d24b3a110
http://www.google.com/search?aq=2&oq...a8401d24b3a110
04-07-2011, 09:38 PM
#2
Super Moderator
Victor, your damaged threads secured the #4 idler “guide” pulley that mounts on the water pump, yes?
If so, the OE or PSK fastener (at that location) requires a M10/1.50-pitch bolt. Source a HeliCoil® insert that will restore that sizing and configuration. Note the original threaded opening must tapped oversized -approximately 13/32” in this instance- to accommodate its new steel insert. It may be necessary to first remove the water pump in order to drill and re-thread to sufficient depth, unless a helicoil-specific tap is used.
Most any competent technician will be able to perform the task, thereby saving the expense of replacing an otherwise sound pump.
reference:
http://www.emhart.com/brands/heli-coil
http://emhartamericas.com/pdf/Heli%2...20Rev.5%20.pdf
photo credit c32AMG-DTM
If so, the OE or PSK fastener (at that location) requires a M10/1.50-pitch bolt. Source a HeliCoil® insert that will restore that sizing and configuration. Note the original threaded opening must tapped oversized -approximately 13/32” in this instance- to accommodate its new steel insert. It may be necessary to first remove the water pump in order to drill and re-thread to sufficient depth, unless a helicoil-specific tap is used.
Most any competent technician will be able to perform the task, thereby saving the expense of replacing an otherwise sound pump.
reference:
http://www.emhart.com/brands/heli-coil
http://emhartamericas.com/pdf/Heli%2...20Rev.5%20.pdf
photo credit c32AMG-DTM
05-09-2011, 12:30 PM
#3
MBWorld Fanatic!
Thread Starter
Victor, your damaged threads secured the #4 idler “guide” pulley that mounts on the water pump, yes?
If so, the OE or PSK fastener (at that location) requires a M10/1.50-pitch bolt. Source a HeliCoil® insert that will restore that sizing and configuration. Note the original threaded opening must tapped oversized -approximately 13/32” in this instance- to accommodate its new steel insert. It may be necessary to first remove the water pump in order to drill and re-thread to sufficient depth, unless a helicoil-specific tap is used.
Most any competent technician will be able to perform the task, thereby saving the expense of replacing an otherwise sound pump.
reference:
http://www.emhart.com/brands/heli-coil
http://emhartamericas.com/pdf/Heli%2...20Rev.5%20.pdf
photo credit c32AMG-DTM
If so, the OE or PSK fastener (at that location) requires a M10/1.50-pitch bolt. Source a HeliCoil® insert that will restore that sizing and configuration. Note the original threaded opening must tapped oversized -approximately 13/32” in this instance- to accommodate its new steel insert. It may be necessary to first remove the water pump in order to drill and re-thread to sufficient depth, unless a helicoil-specific tap is used.
Most any competent technician will be able to perform the task, thereby saving the expense of replacing an otherwise sound pump.
reference:
http://www.emhart.com/brands/heli-coil
http://emhartamericas.com/pdf/Heli%2...20Rev.5%20.pdf
photo credit c32AMG-DTM
I ended up taping the existing and just bought a longer(by half inch) bolt to secure with back part of thread also and used lock tight it's been over 100 miles and all looks and perform great...this kit must mimic a belt wrap also. Car seems to pull harder then before with more consistency. 
BTW my idler screw/thread wasn't as bad as picture above.
Last edited by c32used; 05-09-2011 at 12:33 PM.
04-21-2014, 04:05 AM
#4
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c32 amg
Hi.I have a problem in my c32 amg too.
I loosed the 4 first threads on my "6" pulley in the compressor, when i changed this pulley i think that the previous owner damaged it.
Actually its running good and have good torque 18-20Nm.
What is the required pitch bolt for an heli coil? I think that it is M8??? X ????.
Can any help me?
Best regards
04-30-2014, 09:10 AM
#5
MBWorld Fanatic!
Thread Starter
Hi.I have a problem in my c32 amg too.
I loosed the 4 first threads on my "6" pulley in the compressor, when i changed this pulley i think that the previous owner damaged it.
Actually its running good and have good torque 18-20Nm.
What is the required pitch bolt for an heli coil? I think that it is M8??? X ????.
Can any help me?
Best regards
Not on PC to look but I believe Splinter already says what to do in his post
