Notices
928 Forum
Sponsored by:
Sponsored by: 928 Specialists

Towing eye thread cleaning tap useful ?

 
Old 01-12-2012, 11:21 PM
  #16  
jpitman2
Addict
Rennlist Member
Thread Starter
 
jpitman2's Avatar
 
Join Date: Dec 2002
Location: Australia
Posts: 4,686
Likes: 0
Received 0 Likes on 0 Posts
Default

Once Dave has finished with it, it will be on its way over there....take a number please, with Electronic Alan. Wiith luck, a week - 10 days.
jp 83 Euro S AT 54k
jpitman2 is offline  
Old 01-13-2012, 01:18 PM
  #17  
CraigL
Addict
Rennlist Member
 
CraigL's Avatar
 
Join Date: Apr 2010
Location: St Louis, MO
Posts: 183
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SeanR View Post
I'd pay $30 or so, but not $75.
You misread it. $175 is the price for one. Yikes.

I'm going to modify my tow hook to work as a thread chaser.
If that is unsuccessful, I will chase it with JPitman2's tap.
CraigL is offline  
Old 01-13-2012, 07:47 PM
  #18  
M. Requin
Addict
Rennlist Member
 
M. Requin's Avatar
 
Join Date: Mar 2007
Location: Central Virginia
Posts: 3,397
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by CraigL View Post
Well, I have found someone who can supply this unusual tap.
Porsche tax included, of course.

M 20 X 8 PITCH R.H. KNUCKLE THREAD TAP PLUG CHAMFER BRIGHT FINISH
1 PIECE = 175.00
2 PIECES = 135.00 EACH
LEAD TIME IS 5-7 WORKING DAYS

Now that's a hefty price for a single use tool! I suppose if someone were interested in jumping in on the opportunity, I might go for the 'lower priced, high volume option'.

Ideally, these rarely used tools would be made available for a fee to interested parties (RL members, 928 OC members, customers of parts suppliers). I think this model already exists with the water pump repair tooling and even a shark tuner.

Comments?
Where did you find it? I've looked at T-Tech and a couple of others but haven't gone to the machinists' forums yet.
M. Requin is offline  
Old 01-13-2012, 09:41 PM
  #19  
Tails
Addict
Rennlist Member
 
Tails's Avatar
 
Join Date: May 2001
Posts: 1,113
Likes: 0
Received 0 Likes on 0 Posts
Default

As stated my aluminium plug was corroded into the forward towing eye which required drilling out. I only found this out when I need to be loaded onto a flat bed when I have a fuel pump failure around a thousand kilometres from home.

I later drilled it out and was lucky enough to have a thread chaser to clean up the thread profile. Not tap available at the time and now I find out JP has a tap.

I turned up a brass plug and fitted it using "Anti-scuffing past" on the threads. No problems removing the brass plug. Nothing fitted to after towing point.

Tails 1990 928S4 Auto
Tails is offline  
Old 01-15-2012, 11:32 PM
  #20  
Dave928S
Addict
Rennlist Member
 
Dave928S's Avatar
 
Join Date: Jun 2008
Location: Tasmania, Australia
Posts: 4,585
Likes: 0
Received 0 Likes on 0 Posts
Default

First ... thanks to John for loaning the tap and shipping it to me so quickly. JP .. it's in the post (express) back to you ...

My front point was jamming as a result of dirt accumulation over the years, as it was missing the plug. The tap worked like a charm in cleaning the threads out of accumulated dirt and scale, and I finished off by flushing the threads clean with water, and then spraying with a corrosion inhibitor when dry.

I've taken a pic of the tap, which has a nice extended shaft to get to the tow point threads without hitting paint, and a pic of a plug I found that fits perfectly. For Oz listers, it's a Mardon marine drain plug (made in Sydney). I got it from a hardware outlet, and I'm sure they are a standard item in a marine supplier here, and probably in other countries.

As you can see the plug is a simple square thread, but the pitch is right and it fits perfectly. I put some anti-seize on the thread to stop it galling on the metal and lightly tightened it up with a pair of pliers. Even if it did seize it will allow a fair bit of pressure to be used on the end flat, and would be easy to drill out.
Attached Images  
Dave928S is offline  
Old 01-16-2012, 02:51 AM
  #21  
danglerb
Super User
 
danglerb's Avatar
 
Join Date: Oct 2006
Location: Orange, Cal
Posts: 8,550
Likes: 0
Received 1 Like on 1 Post
Default

Knuckle thread seems very practical, I wonder why its so hard to find, maybe some other name is common? Or maybe its one of those things that just doesn't intersect with the net?

Maybe the guys who do those tow hook license plate things have some insight?
danglerb is offline  
Old 01-17-2012, 09:34 PM
  #22  
jpitman2
Addict
Rennlist Member
Thread Starter
 
jpitman2's Avatar
 
Join Date: Dec 2002
Location: Australia
Posts: 4,686
Likes: 0
Received 0 Likes on 0 Posts
Default

Tool is en route to Alan now. Might be fun to keep track of how many places it visits while its there....
So far :-
Melbourne, Vic, Oz
Kingston, Tas, Oz
jp 83 Euro S AT 54k
jpitman2 is offline  
Old 01-17-2012, 10:12 PM
  #23  
Dave928S
Addict
Rennlist Member
 
Dave928S's Avatar
 
Join Date: Jun 2008
Location: Tasmania, Australia
Posts: 4,585
Likes: 0
Received 0 Likes on 0 Posts
Default

Hi John

Just thought I'd list the procedure I followed, to make sure I looked after the tap, and didn't damage the threads on the car. I know this will be unnecessary information for most, but maybe some who might be using the tap haven't used one before.

1. flush out thread with water and a small bottle brush to get rid of dirt and any rust scale.
2. brush again and blow out with compressed air.
3. lubricate tap and thread with cutting oil or similar.
4. Important .... back the tap out as many times as is necessary during tapping, when resistance is felt, to clear the thread of debris. Keep well lubricated and clean. Do not force!
5. when full depth is reached clean out the thread again.
6. run the tap in and out of the thread again as a final check, then the tow hook, and clean.
7. do a final clean and put a smear of anti-seize on the thread.
8. fit a plug to keep debris out.
Dave928S is offline  
Old 01-17-2012, 10:56 PM
  #24  
jpitman2
Addict
Rennlist Member
Thread Starter
 
jpitman2's Avatar
 
Join Date: Dec 2002
Location: Australia
Posts: 4,686
Likes: 0
Received 0 Likes on 0 Posts
Default

I am not too worried about cleaning up accessible threads, but the cases where the alloy plug needs to be drilled out. The two cases I have done were like this, and it takes some care to avoid damaging the nose - long drills in the relevant size wont be cheap or common. Once most of plug is out, and the tap can be started, it will take some patience working it back and forth, remove, clean, lubricate, go again.
jp 83 Euro S AT 54k
jpitman2 is offline  
Old 01-18-2012, 09:44 AM
  #25  
AO
Supercharged
Rennlist Member
 
AO's Avatar
 
Join Date: May 2002
Location: Back in Michigan - Full time!
Posts: 18,899
Likes: 0
Received 0 Likes on 0 Posts
Default

How can I get on this list?

I drilled, cut, and picked mine last summer to the point where I can get a tow hook in about 2 1/2 turns. I know I marred the threads a little with the pick and saw I used, plus there are probably some little bits of plug left in the threads. I could really use this and I'm sure some other Michigan folks would appreciate getting a crack at it.
AO is offline  
Old 01-18-2012, 10:16 AM
  #26  
Alan
Electron Wrangler
Lifetime Rennlist
Member
 
Alan's Avatar
 
Join Date: Mar 2002
Location: Phoenix AZ
Posts: 11,930
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Sterling View Post
sounds like one of those tools the OC should purchase and rent out to members...
Sterling -
this is the Virtual International Owners Club doing just that. Not sure how jp wants this set up in detail - but basically for a nominal fee and shipping - you get to use the right (expensive) tool for this (presumably) one in a car lifetime job.

When jp proposed this - I said I'd help with the local distribution in the US.

We already have little sideline together for Replacement Gas Cap Pawl Blanks that jp made. I'm still distributing those if anyone needs one. You have to do a little work yourself - but a great start - one that will never crack.

Guys like jp who make critical replacement parts and/or lend out expensive one time stuff to the rest of the community are what make this such a great place... Bravo!

Alan
Alan is offline  
Old 01-18-2012, 05:35 PM
  #27  
jpitman2
Addict
Rennlist Member
Thread Starter
 
jpitman2's Avatar
 
Join Date: Dec 2002
Location: Australia
Posts: 4,686
Likes: 0
Received 0 Likes on 0 Posts
Default

AO - watch this space....
jp
jpitman2 is offline  
Old 01-19-2012, 10:22 AM
  #28  
90 S-4
User
 
90 S-4's Avatar
 
Join Date: Mar 2004
Location: OC. Calif
Posts: 624
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes ! I'd like to get on the list too !
90 S-4 is offline  
Old 01-19-2012, 10:41 AM
  #29  
auzivision
Super User
 
auzivision's Avatar
 
Join Date: Jun 2006
Location: Indianapolis Area
Posts: 2,606
Likes: 0
Received 0 Likes on 0 Posts
Default

I second the motion that the 928 Owners Club would be a great administrator for such a tool... until then, I'd like to get 'in-line'
auzivision is offline  
Old 01-31-2012, 01:41 AM
  #30  
jpitman2
Addict
Rennlist Member
Thread Starter
 
jpitman2's Avatar
 
Join Date: Dec 2002
Location: Australia
Posts: 4,686
Likes: 0
Received 0 Likes on 0 Posts
Default

Not arrived yet Alan?
jp
jpitman2 is offline  

Thread Tools
Search this Thread
Quick Reply: Towing eye thread cleaning tap useful ?


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: