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Triumph TR6 - Flywheel bolt

Does anyone know the size (thread and length) of the flywheel bolts?
Chris

Chris,
Check the TRF VOL II, then translate the code for lenght and TPI. I"ll double check and post tomorrow.

db
Doug Baker

Doug,

I'm not very familiar with the TRF Vol II (though I do have the electronic copy), and after looking at it, I can't find anything related to the flywheel.
Chris

Chris- I suggest ARP bolts for this. They stock the correct size
DON KELLY

Chris, my mistake...TRF VOL I, plate AJ48, part number 147299. Translate this to length/TPI and you're there. I don't have me decoder with me, but search the archives and you'll find a note from Steve Pike about how to read bolt size from these numbers.
db
Doug Baker

147299 doesn't translate to a size as it is a specialty bolt. Go ARP
DON KELLY

Agree with Don, that is a good application for ponying up the brass for the ARP bolts. Even the standard bolt is somewhat of a specialty bolt. The grip length is controlled (don't want any shear loading against threads!) and it is a higher strength bolt than most, also seem to recall that the radius under the head at the end of the grip section has a somewhat larger radius.

While there are lots of sources, I ususally get my ARP stuff from Advanced Performance Technologies ( http://www.aptfast.com ). They are a specialty BritCar performance parts dealer out of Riverside CA.
SteveP

Doug..doug...Doug
Do do have CDII do you not?
Cross reference can be found there but not in this case of specialty bolt.
Rick
Rick C

Rick...Ricky...Richard...!!
cdII did not work for me very well. You encrypted it in some strange SW that required my first born to decypher. I think that I have most of it, but I down loaded a copy on a dial up line and probably missed a good bit. I had most of the stuff anyway, I think. Did we not discuss this last year and you were gonna send me a cd??
db
Doug Baker

I saw the ARP bolts on the APT website, but I was hoping to buy them locally from an ARP dealer. ARP does not list the TR6 bolts on their website nor do they know (I called ARP today) which bolt APT is selling for use on the TR6. I was hoping someone knew the bolt length so that I could get my local dealer to obtain a set for me. He can get them the same day and I don't have to pay extra for shipping (plus I need them by Saturday so that I can change out the 4 speed tranny for an OD tranny).

Chris
Chris

They are listed if you dig. I have my boxes up stairs and if I remember I will check the #
DON KELLY

Don't take this as gospel as I cannot verify right now, but seem to recall it being listed from ARP as small block Chevrolet application that is 7/16-20. You can verify the diameter and pitch using a standard bolt, then get "the good stuff" accordingly.

I get them from APT since other bits are being purchased at the same time wheever I need ARP hardware, getting it from makes it kind of a one stop shopping excursion.
SteveP

Don,

They are listed on APT's website but not ARPs...and ARP does not use APT's number.
Chris

Bought mine from ARP
DON KELLY

Don, if you get a chance send me the number.

Chris
Chris

Doug
Will find that little rod you want and include a copy of CDII ( it will actually be a Data DVD becuse too big for CD).
Rick
Rick Crawford

Doug, when you get it from Rick spend a couple of buck s and put it on a big thumb drive and keep it on the machine. That way it is easy to add to and reference from.
DON KELLY

A quick look at the APT site shows their number for the ARP flywheel bolts as FBT716-4 for the Triumph engines and FBT716-6 for the MGB engine. Knowing that the Triumph engines use four bolts and the MGB engine uses six bolts, this would lead to the conclusion that the fastener is indeed a 7/16" diameter fastener. Also note that there is a callout in the APT catalog for some .062" (1/16") hardened washers that are used for the Triumph applications.

The ARP catalog list a number of 7/16-20 fasteners in various lengths in the flywheel/flexplates section of thier catalog. If you have the stock bolts, measure the length, taking into account that a .062" hardened washer is used in this application and select an appropriate length from the ARP catalog to detmine the part number and application.
SteveP

Sorry, got called away and didn't finish the thought on the fastener callout. Another possibility in the APT listing is that they are using numbering convention that is in keeping with other types of size identification. As an example, in the AN-MS-NAS callout convention, things are often sized in 1/16ths of an inch. Something with a 1/4" OD would be a -4, a 1/2" OD would be a -8, 1" would be a -16, etc. Lengths are handled in a similar manner. If that convention is used, the APT listing could indicate a 7/16 or -7 diameter with a 1" or -16 length, making it a 7/16 bolt that is 1" long. Which in turn ties in with the recollection that it is called for a Chevrolet application in the ARP catalog, their part number 100-2801 for the standard ARP or 200-2802 for the APT Pro Series, both sold in a set of six.
SteveP

This thread was discussed between 10/05/2007 and 13/05/2007

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