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Would bent valves damage crank bearings?danielsatur 07-10-2009, 12:15 PM 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! Towncar 07-12-2009, 04:20 PM 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.. :) danielsatur 07-12-2009, 05:53 PM 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. Kitt1993 07-12-2009, 07:46 PM 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: danielsatur 07-12-2009, 08:28 PM [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 danielsatur 07-23-2009, 12:41 PM Gave project 1995TC to a young Family in need! Towncar 07-23-2009, 01:41 PM Gave project 1995TC to a young Family in need! Isn't that a bit cruel :nono: Kitt1993 07-23-2009, 10:30 PM Ohh dammit man!!!!! vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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