GT6 Engine Rebuild

[swifty]

Just bought a 1973 GT6 engine to fit into a navigator. The engine require a full strip and overhaul and may be a few mods on the way.
This is the stage i am up to at the moment.
IMG_3992.jpg

Anybody fitted a mild race cam into a straight six, if so what and how has it preformed.

May change the carbs also so any advice welcome.

I am looking at using a type 9 gearbox for a fifth gear and reliability, may try and make the adapter plate if i can find a drawing online.

[Barry Stard]

Hello swiftly. I am at the loads of broken bits and tons of oil over the garag floor stage with myherald engine! I think my replacement engine backup plan is going to be a betteridea. Must figure out how to insert photos on here

[swifty]

Hi Barry that does not sound good.

There's a thread some where on this forum on how to upload images, i am still having a few problems myself so i am afraid my advice may not be correct, you will find out that images are liked on this forum.

[Barry Stard]

I think itsagonner!

[phil9]

hi swifty its a very easy job i have a kent can in mine with cam followers from jigsaw racing i use roller rockers now as well have a look at my old posts for pic ..i have a book with all cam setting for all makes of cams for triumph s easy engine to work on

[swifty]

Any body got a bell housing handy to measure for me across the area where the red line is drawn in the image.
bell housing1.jpg

Also looking for a GT6 bell housing and GT6 a distributor, if anybody has one give me a shout.

[AndyP57]

Sorry about the delay. We've got a 2ltr donk arriving mid next week and by all accounts it's coming with a spare dizzy. If it does I'll let you know

[swifty]

Thanks Andy, i managed to get a GT6 bell housing.

[swifty]

Engine now stripped and measured ready for the work to be done. The bores have been taken to there limit so if another rebore done then new wet liners required. The crank also has been ground but looks and measures to be ok. Rocker shaft and tappets need replacing as they are 2 tho over size.
One thing is its the later version engine so already has the bigger inlet valves and domed topped pistons.


eng1.jpg

eng2.jpg

Domed topped pistons with bore top recess for later type gasket.

eng3.jpg

Larger inlet valves before stripping the head down.

eng5.jpg

eng4.jpg

Pistons etc lined up and numbered ready for measurement.