Surprise in oil change. What is it?

[71whitewesty]

Great to hear and glad it didn’t cause any damage.
_________________
71 Westy 1600 DP, all stock Bus 1
1970's Snow Trac 1600 SP (sold 12/2016)
1968 Tucker sno cat, sold 2021
1969 Tucker Sno cat 542
2017 VW Alltrac
71 tin top stock 1600 DP (project but runs)
Twin 71 White Westy, Bus 2, that I pulled from a 15 year slumber in a dry eastern WA field in 2015.
1966 Sundial Camper "Boomer"

[aeromech]

You need a boroscope
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[airschooled]

[aeromech]

That’s very common. The mechanic has a solid hunch that the cause must be such and such. Later finding his assumption to be wrong. It’s happened to me numerous times. I find that usually we assume that the cause must be the hardest, most expensive thing, like a bad ecu only to find later that it was just burned points or something else like a bad spark plug ( happened to me once).

Tools like boroscopes are great for diagnostics. All we need to do Is think about taking the 15 minutes needed to use it.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[tommu]

Congrats! Any sign of the ring kinking or bending where it snapped?
_________________

[tristessa]

[Wasted youth]

Well, that's interesting. Given the W I D E gap allowing the shrapnel to descend into the sump, I wonder...

1) How common is this problem?

2) How long will it be before it happens again?

[HoboBus]

Glad you got it all sorted!

So we're saying the green side of the broken expander is still in the sump?

What did the top of #2 look like, with the bad plug? Might have weak spark on that cyl or something. (?) Did you replace plug 2?

Did you change all 4 expanders? Review the other 3 expanders for cracks?

Things to keep an eye on.

Good job,
Hobo
_________________
Salt air it ain't thin, it'll stick right to your skin,
it'll make you feel fine. Makes you feel fine.
And I wanna be there. -- Jimmy Buffett

Just a beach-oriented camping Hobo with a bus.

[Abscate]

Your sockets are out of order and one is upside down

The green part of that ring will be on the right side of the engine, the red, to the left

Thanks to clatter for bringing the new word to the lexicon..