Would bent valves damage crank bearings?

1995 Towncar/160K miles in excellent cond other than bad motor.

Left bank (cylinders 5-8) has no compression.

Timing chain jumped a tooth near crank during a valve stem seal replacmment.

The 4.6L is a interference type engine,so the valves bent.:headshake


I was thinking about replacing bad valves on the L-bank.

* 1) Removed battery
* 2) Removed FUSE/RELAY for electric fuel pump.
* 3) Disconnected fuel lines

* CAUTION- If you need to connect battery,because of Trk pull-down or windows,
you don't want low fuel pressure to enable electric fuel pump to dump raw fuel!

4) Removed coolant
5) Removed Heater & coolant hoses
6) Removed fan & Radiator.
7) Disconnected electrical bus harness from engine.
8) Removed Coil packs,and ignition wires from engine.
9) Removed surpertine belt & alternator.
10) Removed Intake.
11) Removed valve cover & cam on L-bank
12) Broke lose all Head bolts on L-bank & busted my dam knuckles.:runaround:

Is this why so many technicans retire at a Auto part store?

Note: Need to disconnect CAT from exhaust manifold.

I'am hoping to remove L-head without taking pwr steering,Air cond,and timing chain V-cover a off!

Generally speaking, valves bend to easily to do any harm to crank bearings.

I would imagine however.. if anything could position itself just right to stop a traveling piston, that force would be transmitted directly to a rod bearing. Close inspection to the piston tops will determine if any further damage should be sought out.

BTW:
Not long ago.. you were giving advice to junk these "dime a dozen" 4.6's since they can be found easily just about anywhere.. :)

That's true! CV,MM,and TC's

$250 @ LKQ
I would have to pull two motors! & be doing another valve stem seal
replacement.

This is more like a project type car,because its is in excellent cond.

The R-side ''In the car Valve stem seal replacement'' went good,but it was my
BAD on the L-side.

Just trying to fix my BAD,because this car been so good to me.

BTW:
Not long ago.. you were giving advice to junk these "dime a dozen" 4.6's since they can be found easily just about anywhere.. :)[/quote]


LMAO!!! :rofl: :iagree:

[quote=danielsatur;6002441]That's true! CV,MM,and TC's

$250 @ LKQ
I would have to pull two motors! & be doing another valve stem seal
replacement.

It's more labor intense than parts!

Parts are cheap,and this car still has very little value running.

For Sale As is for $800,or $1500 running.

This project was a good lesson,see http://www.automotiveforums.com/vbulletin/showthread.php?t=954555

Gave project 1995TC to a young Family in need!

Gave project 1995TC to a young Family in need!

Isn't that a bit cruel :nono:

Ohh dammit man!!!!!