MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Recommendations

Parts

TR parts and Triumph parts, TR bits, Triumph Car Spares and accessories are available for TR2, TR3, TR3A, TR4, TR4A, TR5, TR6, TR7, TR8, Spitfire and Stag and other TR models are available from British car spares and parts company LBCarCo.

Triumph TR6 - Need to source four 74.7mm pistons

Hi, I've jumped over from the MG BBS. I need to source four in-expensive 74.7mm Triumph (2.5 ltr 6 cylinder) pistons. I need them for a BMC A-Series project, hence I only need four.

I was on the Moss site and they sell in sets of 6. Thanks for help.

James
J E G Eastwood 1

James-TRF sells individual pistons for $94 each.
Berry Price
BTP Price

James-check out ebay item#350180753926, which is a set of std. TR6 pistons (refinished, whatever that is) for a buy it now price of $50.It doesn't include rings.
Berry Price
BTP Price

Gents thanks, I looked up the eBay no. but it was for a book on Wikipedia.

Moss sell a set of 6 here in the UK for ~£160, so I'm hoping to find them for about £30 each, bough singularly, to amke up a set of four.

Thanks, James
J E G Eastwood 1

James....
I don't know if this will work, but might be worth checking out....
From the Cape Cod British Car Club.
http://www.buckeyetriumphs.org/technical/TR6ShopReference/TR6ShopReferenceData.doc

Concerning Mazda pistons....
2700cc Conversion Using Mazda E5 Pistons - Supposed to be a very easy modification. Use 0.5mm (0.020") oversize E5 Mazda pistons & rings. There are several types available & the one selected has approximately a 7cc dish in the crown. The pistons require a circlip groove to be machined into each side of the gudgeon pin hole to retain the gudgeon pin. A non removable (without replacing them) type of circlip was used. The con-rods need to be resized & new little end bushes made to suit the E5 pistons. The con-rods remain the original length. On assembly the pistons cleared the block deck by about 0.1mm (0.004") @ top dead center. http://home.iprimus.com.au/tridim/triumph/Engine.htm Another opinion - A TR6 block will take 2.71 litres easily using Mazda pistons. There are a few specialist Triumph shops out here that carry out the work & stock 2.7l head gaskets. The Mazda pistons are sourced from the Mazda E2000 series light truck (I think) but require a little work. You can use Teflon plugs for the gudgeons instead of circlips. The block needs to be decked about .020” to maintain correct compression & piston height. As a precautionary measure, you might want the machine shop to offset bore the cylinders a little to increase wall thickness.

Good luck.......
Rod
Rod Nichols

James-Sorry to give the wrong item #, should be 350181735926.
I have spent a bit of time on ebay recently looking for a single .020+ piston to replace one that was damaged by some unidentified debris after a minor rebuild. I was able to score the piston, but the cause of the damage is still a mystery.
Berry Price
BTP Price

This thread was discussed between 23/03/2009 and 25/03/2009

Triumph TR6 index