19 November 2015

Stupid stuff

Called Millennium Technologies and got a quote for cylinder stripping and re-plating with Nikasil, cost seems very reasonable, may take care of that in the next couple weeks. Other than cleaning the heads and case, that's the only thing holding up engine reassembly.

The receipts for all the bottom end work done in the 70's indicated that the big con-rod ends were checked and serviced, and in my rush to attack the sludge trap I neglected to take any measurements. For shits and giggles I figured I'd check at the minimum the side clearance since it's the easiest to measure. Can't get any more middle of the road to spec (0.3mm-0.5mm) than that.

Also tried one more thing to free the oil drain plug on the sump before drilling it out. Thought outside of the box for once and put the plug in a vice, then used my body leverage to turn the pan instead of the rounded out plug. Immediate results.

Stupid plug

Threads saved

Now I'll have to find a replacement plug (or make my own). Going to turn it into a magnetic one using this idea from ThisOldTractor.com. What a great resource that site has been.

13 November 2015

Moto Guzzi V700 Sludge Trap

The Guzziology book says to just destroy the sludge trap plug when removing. They tend to be seized, besides being punched to further lock up the threads. My plug was punched in the 6 o'clock and 12 o'clock positions and was super seized. Allen key wouldn't free it, hammer impact driver wouldn't work, impact gun succeeded only in messing up the hex slot in the plug. My plug was stuck and I don't have a M22x1.25 tap to remove it, so I took it to the old timer machinist over the bridge to drill it out for me. $20 later I have a nice crank with very little stuck in the sludge trap.

I used a special factory tool to clean out the big pieces of sludge. Chemical cleaning with a brass brush will happen later.

Not bad for a utensil

12 November 2015

Digging into the Guzzi part IV - end

Had some time to completely finish stripping the Guzzi this morning, what a beautiful machine.

The brass drain plug was super seized. I tried using an impact gun on it, but all that did was round out the head. Next I ground down the edges to use my long 19mm wrench on it, and that couldn't break it. Since I'm going to be getting a new plug anyway and I needed the oil out, I drilled right through, drained the oil, and will be dealing with that plug later.


Oil strainer, feed lines, and pump. Looking pretty clean.

 Oil pump gears look good too, but I'll still need to measure the lash to make sure it's still in spec.

Con-rod bearings. No scoring I can feel with my fingertips, but don't look fantastic either. I foresee Plastigauge in my future and possibly new bearings.

Cam and lifters look to be in great shape, not pitting or scoring.

Rear crankshaft bearing removal

The crank looks to be in excellent shape, webbing and pins show no scoring or visible wear

Sludge trap, and the reason I did all this work. Don't have time to open it up and clean it out today, so to be continued on whether or not the complete tear down was worth it.

Engine internals, it looks like there's a lot more than there really is

Next up is the eventual sludge trap cleaning, cylinder Nikasil plating, head cleanup and eventual reassembly.