4.6 with a possible bent valve - Ford Truck Enthusiasts Forums

4.6 with a possible bent valve

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Old 10-14-2009, 09:59 PM
hotrodlincoln69 hotrodlincoln69 is offline
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4.6 with a possible bent valve

I just picked up a very cheap 97 F150. After driving it I noticed a misfire so i changed the plugs. All the plugs looked good other than #8 was black. A compression test revealed zero compression on that cylinder so I pulled the valve cover. The rocker arm had fallen off so I loosened off the camshaft and slid the rocker back in and torqued the cam down and put everything back together. When I fired up the engine it sounded like the valve hitting the piston. I am assuming there is a bent valve and that is likely the reaon for the rocker coming off. Any other suggestions or oipinions?
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Old 10-14-2009, 10:25 PM
Stillen GLE Stillen GLE is offline
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Yup, what was the compression for all of the cylinders? how did everything else look in there. take pics next time.
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Old 10-24-2009, 01:08 AM
mattjensen mattjensen is offline
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i had a 00 with the 4.6, bent a 4 valves, broke the rocker arms. Do not know what the deal was with that.
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