1971 Triumph Tiger 650cc Restoration Part 11, Rebuilding the engine bottom end

In this video we start to assemble the 1971 Triumph Tiger 650cc engine. We start by cleaning up the cases, then deal with another problem we come across, then move on to assembling the crank assembly, then we finish off this video by installing the connecting rods and installing the crankshaft and putting the cases back together. Also, stay tuned for the next video coming, when stuff starts getting even more interesting, It will be where we start installing the engine lower end assembly into the frame and more, as we keep moving forward on this restoration.

[@RobertJones-fq9dk]

Enjoying watching you two work together! You had a considerable amount of filings swimming around in that engine.
In your sump, in your pump, in the crankshaft oil ways, and in the OPRV. Replacing both main bearings is standard practice. No amount of cleaning will insure even a new a bearing to be 100% after that exposure, let alone one that is who knows how old. It would have only added a couple hundred dollars and a bit of labor to the project, but more importantly, peace of mind. 🙂

[@pauliebots]

In the words of Lunmad.."gonna be lovely".
Nice work men.

[@jessesvintagegarage765]

Thanks for the nice comment,

[@jontg429]

Great video! I am in the process of rebuilding my 650. What is your opinion on re-using the connecting rods? I know you have to replace the bolts, and my rods are in good shape, but as they say, aluminum does age harden.

[@jessesvintagegarage765]

We've rebuilt many motors over the years, and we never put new rods in any of them. The Triumph 650 has wrist pin bushings, which need to be checked and replaced as necessary. But if the rods aren't nicked or sratched deep they will be fine as far as the bolts that's a personal choice to replace or reuse for us it's all about condition and if someone has been in there beforehand. Sometimes, they peen the nut after it's torqued, so we always install new nuts.

[@russturner1570]

You have left out one very important step.............checking the nip or crush of the big end bearings when assembled on the rods!!

[@TheReverb1]

Hello; pretty good. I have few questions if may I...how do you upload these larger videos? I imagine that the weight is in GB...
Seems that is recorded with a "go pro" or similar. Is the audio edited? or only the text and some music?
What about the vibration etc on your movements?
I have a fujifilm camera or a cell phone to try to make a recording. The camera archives are too heavy so I am thinking in the phone but..
Thank you in advance

[@jessesvintagegarage765]

I just use my phone to record everything and size is a problem but anyway, I use a computer to add the rest of the stuff,

[@russturner1570]

More issues.......28ft lb torque figure has now been shown to be too high.The correct method is to measure rod bolt stretch.At the very least rod nuts should be replaced with new.More examples of "enthusiasts" V professional engine builders.