Another Engine Build thread stock type 1 dp (Happy Ending)

[Amskeptic]

wracking brain,
neal

Drive modestly. Stay out of "feelable" vibrations. Deal with it before 10,000 miles. Understand that there is no fooling around here. Vibration causes premature hardening of magnesium which can lead to cracks. It sucks when you go through all the steps as carefully as possible and either a dumb machinist or your own oversight causes issues. It is the human condition most every day on the planet. There are, and you know it, relentlessly thorough people in the world. Many worked in Wolfsburg. We try to emulate them where we can.
Colin

[ruckman101]

Well aware that the vibration issue can't be ignored. To do so drastically shortens the life of the engine. Yes, not frequenting the higher rpms as much as I would otherwise, and hope hope hope the issue is the result of an easily resolvable oversight. Still under 300 miles.


neal

[vdubyah73]

take it out and check clutch and p/p. if nothing obviously wrong, rotate p/p 180º. see what happens.

[Amskeptic]

take it out and check clutch and p/p. if nothing obviously wrong, rotate p/p 180º. see what happens.

Neal was with me when we did that to Chloe's 1600 singleport at Hambone's.
He was not there when I also re-rotated pressure plate on flywheel which I also re-indexed to crankshaft, at Elwood's.

I am not entirely happy with current balance of this engine, and shall deal with it yet again. And again, if necessary.
Colin

[hambone]

It is a very irritating process. Perfection has it's demands.
I can't even imagine a world where the parts are balanced in the first place.

[ruckman101]

Ok, have an open bay, engine coming out today. It has been suggested it might be a bad gland nut?


neal

[Amskeptic]

It has been suggested it might be a bad gland nut?
neal

Any explication as to how the gland nut might affect balance? If it is going to be offered as a cause, it would help to know how.
Colin

[hambone]

Don't forget you pulled the ring of the PP, that could affect balance.

[Amskeptic]

Don't forget you pulled the ring of the PP, that could affect balance.

If the pressure plate were balanced with the ring in place-but-slightly-out-of-round, yes.
But generally, removing mass from the center is not a game changer.
ColinGeneralLee

[ruckman101]

Cracked gland, or pilot nut as Bentley calls it, was the concern that I look there.

I wimped on checking the torque on the top nuts of the heads. Checked the bottom ones. Only one tightened any. Inside intake on cylinder number three, not much. I could see no way to get to the top nuts without pulling shroud and intake manifold. Wimped.

Checked everything else I could think of. Exhaust at heads all tightened up a bit, nearly all tin screws tightened. Intake at heads were good.

With the help of my nephews, putting the engine back in was like butter. It just slid on like it was more than happy to be reunited to transaxle. They held it steady rolling it under the car, then spotted as we lowered the car for clearance, everything looked good and it just slid on. Sweet.

Forgot to punch a bigger hole in the seal to run the accelerator cable through, but the initial puncture was there and I managed with much less frustration this time.

There was also the alarming realization when I pulled the engine that my braided fuel line was sagging and had been riding and rubbing a bit on the CV at the transaxle, so employed some heavy gauge insulated electrical wire to pull it up out of the way, from the clutch cable mount. I'll be keeping an eye on it, and there must be a more eloquent solution, perhaps shortening my lengths of flexible line and rethinking the fuel filter in that mix.


neal