Another TR tool kit question

Karl, just for S&G's I went out to the garage to see if your tool roll looks the same as mine in my 1986 (late) Testarossa. I never had such a paper sticker, nor do I know it's meaning. Below are pics of my tool roll and it is essentially the same as yours except for what you have next to the plyers. I think that is a tow-eyebolt, but will that fit your 1986 TR? You may want to test fit it on your car. I took a pic of mine for comparison and it does not fit in the tool roll. It has ~16mm threads and lives in the large tool bag. Note I keep a washer and nut on my eyebolt for use after Ferrari told me that they really would not want to trust the car to just a few threads. I agreed with them after seeing my car being pulled up the steep incline of the car hauler. EDoug


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Do not believe that any of the 3x8 series of cars came with a screw in eyebolt for towing purposes. The 3x8 car's space frame had welded on plates with a hole, one at the front and one at the rear, for towing/winching, I believe. Also, the oval shape of the eyebolt in the OP's picture, and the length of the eyebolt shaft, may be compatible with the F40, as I recall that being the shape of the eyebolt in the F40 tool kit. Don't know if 500TR or 500M used different eyebolts than early Testarossas.

 

His tool kit contains the early style towing eye. Yours contains the late style towing eye. Both are correct.

I do not understand.How does the nut and washer allow more thread engagement ?

 

All correct for very early TR including the label and 12mm tow hook.

 

M16 x 2.0 thread https://www.hillengineering.co.uk/towing-eyes/tow-01

The early TR tow hook should be M12

 

Brian, reminds me of the old Wrigley's Doublemint Gum commercial. It simply "doubles your pleasure." I think of it if there were to be a pending thread failure in the front frame section, for whatever reason, so after the eyebolt is screwed into the front frame section, then the 10.9 nut/washer is tightened onto the eyebolt from the backside of the frame which would aid in preventing any such pullout. I would have to make a measurement, but I think there are more high-quality threads on the 10.9 nut than there are in the mild steel metal thickness of the front frame section.

Karl, there are no markings on my screwdrivers, and I do not remember having any such 12mm tow eyebolts in my old 308 days. My Testarossa is a late 1986, and the 16mm tow-hook came with the car. EDoug

 

Sorry, 100% wrong. It ads nothing and probably uses threads that could be used screwed into the frame.

Your understanding of how threaded fasteners work is very lacking and probably increasing the chance of a failure.

Use it the way Ferrari designed it and stop with the ill advised modifications.

 

Over thinking.

 

Brian, seems like we are talking past each other, so this is my last try. Certainly, install the tow eyehook as Ferrari intended:


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The threads are fully engaged into the frame as Ferrari designed. 1/2 inch of the threads are now exposed on the backside and don't participate in any engagement.

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The 16mm nut/washer will act like a jamb-nut engaging the previously unused back threads, thus increasing system resistance to pull-out.

David, it is overthinking under usual circumstances.

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And the factory part has failed in how many cases?

 

Brian, if I may, were the longer oval tow hooks for the 512TR and 512M simply needed to accommodate the changes in the front end styling of these later cars vs. any structural change to the space frame? Also, was that longer tow hook shared with the F40 of the same period? It looks very much like an F40 tow hook. Your expertise is very much appreciated.

 

Does take much force to flat tow a car, I don't think the threads will pull out. Towed many cars with a rope. Bridgeport milling machine weighs one ton. It gets picked up with a 1/2" eye bolt screwed into the top ram.

 

F40 is a much smaller thread size. I have 3 hooks in my tool box for tow trucks. One coarse thread, one fine thread and the little one for F40.

 

Interesting that Ferrari did not settle on a single thread size/type for the tow hooks that could be used across the range of cars, albeit in different lengths. Thanks for the info.

 

I have picked up cars with a 10mm bolt. Picked up as in off the floor. I towed my truck out of the mud with a single 1 inch wide nylon tie down strap.

 

Why not standardize and have a single engine, or wheel size?

 

Touche!

 

Complete.

Hammer and wrench on Ebay.
Wrench is Stafor 125758.

 

Karl, still missing is the small green covered plastic kit of fuses and bulbs, and the three accessory belts that all live in the tool kit. Page 99 of your 1986 Owners Manual details the tool kit. The pic below shows the open backside of the chin spoiler where the rubber plug would have fallen into. A bright light and small mirror are your friends. EDoug

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Jack kit.

There's also the emergency triangle.