Timesert splitting in half? Need Help

[JJ 911SC]

When I did mine I use Big-Sert kit # 5215 also made by Time-Sert.

As the name imply, it heavy duty.

http://www.amazon.com/gp/product/B003QB5I52/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

[proffighter]

I made this myself, but if you want stock thread size, it's M12x1.5:

Kit Nr. 5215

[JJ 911SC]

Originally Posted by proffighter

I made this myself, but if you want stock thread size, it's M12x1.5:

Kit Nr. 5215

Roland,

Absolutely correct. I check my order and it was the M12x1.5 kit.

[proffighter]

Originally Posted by JJ 911SC

Roland,

Absolutely correct. I check my order and it was the M12x1.5 kit.

Glad you have the correct size then.

[cab83_750]

From what I understand, bigserts are to fix incorrectly done timesert jobs.

When I did mine I use Big-Sert kit # 5215 also made by Time-Sert.



As the name imply, it heavy duty.



http://www.amazon.com/gp/product/B003QB5I52/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1

[cab83_750]

Originally Posted by proffighter

I made this myself, but if you want stock thread size, it's M12x1.5:

Kit Nr. 5215

A little confused: what is this kit and whet did you make?

Thx.

[proffighter]

I made this because there was a not rectangular time sert, but I did not knew until changing from rubber to solid mounts. Here you find some details:

++ BIG-SERT Oversized thread repair kits ++ thread repair kits for oversized holes, previously repaired threads oversized holes

of course no need if you only have a damaged stock thread. then a normal time sert is enough, or a helicoil too, depending on what you prefer. But if like my case, the only solution is a big sert

[cab83_750]

. I am still thick headed. I know about Big Sert which is used to fix botched up tapping job.

But are you saying You made the kit (i.e., you invented it?). If you did, glad to have an inventor as part of the Pelican family.

I made this because there was a not rectangular time sert, but I did not knew until changing from rubber to solid mounts. Here you find some details:



++ BIG-SERT Oversized thread repair kits ++ thread repair kits for oversized holes, previously repaired threads oversized holes



of course no need if you only have a damaged stock thread. then a normal time sert is enough, or a helicoil too, depending on what you prefer. But if like my case, the only solution is a big sert

[proffighter]

oh no! I did not made the kit, I bought it and made the job. Sorry for my poor language skills here

[cab83_750]

. Perhaps it was my poor comprehension.


Anyways, so far my analysis regarding needing longer bolts is correct. I could not find 65 mm bolts today but I did find a 70mm.
I am also waiting for longer insert.

I will redrill and retap again hoping that this 4th timesert job will not result to having to do a BigSert job.

These kits cost!!!!!!!

Perhaps if I end up needing a BigSert job, someone can rent me their BigSert kit.

[boyt911sc]

Originally Posted by cab83_750

Tony,

Your 65mm measurement excludes the head, correct? Mine is just 60mm to the tip of the cone. Where did you get yours? Mine are from Pelican. Is it possible that there are 2 sizes and mine are the shorter version?

Thanks.

cab83,

I did some calculations using your M12 x 1.5 x 60 mm.

OEM transmission mount thickness approx............................. 39 mm
Protruding length of bolt.............................................. ........ 6 mm
Remaining length used by washers........................................ 15 mm (?)

Total............................................. ................................. 60 mm

What thickness (mm) are your washers?
Could you measure the thickness (mm) of the transmission mounts?

Thanks, Tony

[cab83_750]

The washer for the bolt is 2mm. Don't forget that the big washer, the one that covers the rubber housing (60mm), is also about 2 mm.

The xmission mount is about 39mm.

Lastly, I believe that the last 8mm from the tip of the cone is actually useless.

Quote de cab83_750

Tony,



Your 65mm measurement excludes the head, correct? Mine is just 60mm to the tip of the cone. Where did you get yours? Mine are from Pelican. Is it possible that there are 2 sizes and mine are the shorter version?



Thanks.

cab83,



I did some calculations using your M12 x 1.5 x 60 mm.



OEM transmission mount thickness approx............................. 39 mm

Protruding length of bolt.............................................. ........ 6 mm

Remaining length used by washers........................................ 15 mm (?)



Total............................................. ................................. 60 mm



What thickness (mm) are your washers?

Could you measure the thickness (mm) of the transmission mounts?



Thanks, Tony

[cab83_750]

If my bolts are actually too short, I wonder how many of us are out there with these short bolts.

I am not an engineer, but I would think that since these bolts are barely inside the female thread, perhaps all the shaking, stress and pressure of the engine/tranny weight result to damaged threads---and perhaps, if this theory is true, we should stop blaming our mechanics. . Jk!

[proffighter]

In cases like this, my goal is to get a length of 1.5 times x diameter, more does not add any strength. Here it's 18mm then

Rent my kit is possible, but the fact I am in Switzerland does not make this realistic regarding the shipping costs...

[cab83_750]

Well, I believe that my big-sert job was a perfect fit. Very tight.

Just fyi, the drill for the big-sert is a lot longer than the time-sert. This means that your car really needs to be way way up higher to have leverage.

I also use the tap die guide as a drill guide just to ensure I am plumb and straight. I used aluminum foil to enlarge the diameter.

The tap guide is highly recommended for this job (for both timesert and big sert).

I also fabricated tranny mounting bolts since the factory ones that I have were "too short." With the fabricated bolts, I definitely know that I have 16mm worth of threads holding the tranny.

[keynsham1]

Use a helicoil kit like they use on aircraft engines. Timeserts are weird! No-one uses them in the UK.

[cab83_750]

Interesting. From what I have read, time-Serts are a lot better. Perhaps I should re-read and update myself.

I'll wait for others to chime in also.

Use a helicoil kit like they use on aircraft engines. Timeserts are weird! No-one uses them in the UK.