Re: Vanagon Conetastrophy
Posted: Sun Oct 23, 2016 3:10 pm
I see all suggested explanations as plausible.
But, My knee jerk reaction is the shift linkage being struck.
The clean shear is a statement and story in itself.
I have seen cars that had some rather odd damage during my years in a tow truck.
High speed shifts into the wrong gear did sometimes remove flywheels, twist drive shafts, crumble differential components, or even remove complete transmissions (broken from the engine at the bell house) . Some cars crashed.
I fixed a few cars with broken flywheel bolts. But I seldom heard the drivers story.
If you are lucky, it may be that it failed at a weak link with little damage.
I would be anxiously Draining the gear lube for clues.
If you were so lucky to have weak flywheel bolts during an unplanned downshift, you will get to laugh about it some day.
But, My knee jerk reaction is the shift linkage being struck.
The clean shear is a statement and story in itself.
I have seen cars that had some rather odd damage during my years in a tow truck.
High speed shifts into the wrong gear did sometimes remove flywheels, twist drive shafts, crumble differential components, or even remove complete transmissions (broken from the engine at the bell house) . Some cars crashed.
I fixed a few cars with broken flywheel bolts. But I seldom heard the drivers story.
If you are lucky, it may be that it failed at a weak link with little damage.
I would be anxiously Draining the gear lube for clues.
If you were so lucky to have weak flywheel bolts during an unplanned downshift, you will get to laugh about it some day.
Short block on stand awaiting piston removal
Water pump wrist pin access hole
Again
One of the 4 rolled waterjacket o-rings


Wrist pin waiting for extraction
Cleaned & prepped engine case ready for reassembly
Internals
Heads & cylinders
Rods hung
Gears on crankshaft
O-ring washer and pulley key installed
New cam bearings, double thrust
Checking the fit on the camshaft, We have had some issues with cam bearings of late, Check them first!
Crankshaft in case
Then the camshaft
Cam plug
Cam timing confirmed
Other case half ready for reassembly
Curil K2 sealant
Mated
One of the main case studs, inside the water jacket
Cap nuts with special yellow sealant
Wrist pin installation/removal tool
Piston in cylinder
New o-ring with lube
Piston skirt ready for installation
Wrist pin being installed through water jacket port


45 degree Knipex retaining ring pliers
Cylinder head, slightly abused
Ready for cylinder head, water jacket gasket installed with sealant,head gaskets in place, pushrod tubes installed

Head installed
Repeat
Water pump & thermostat housing (1.9 liter type)
Pushrods & rockers
Crossover pipes & dipstick tube, more to follow



Off the engine stand, installing flywheel
Confirming initial endplay (.09mm)
Main seal installed
Flywheel installed checking final endplay
Final endplay (.08mm)
Clutch & pressure plate installed, Engine complete.