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#1
01-17-2011, 09:03 AM
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Knock
Hello,
I have an 89 ford f-150 extended cab long bed 4x4 pickup with the 5.0 and I have been noticing a knock lately. It knocks at start-up for about 3 seconds and then nothing, then at about 1900 rpm it becomes audible again all the way through the rpm range. Tom 
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#2
01-17-2011, 09:24 PM
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Re: Knock
double knock like a piston pin or deep single knock like rods or mains? Or something else? Noticed anything in your oil changes?
__________________
10 hours away from John Deere master certified also master certified ASE tech. Exp. in both. Went to school for cars, wound up staying with Deere dealer for a while, so schooling there too. Also couple years exp in GM and some GM training Gave up wrenching for "Greener Pastures" Current job: RN 2010 Silverado Z71 5.3L 65xxx Wife's 2007 Suburban 1500 LTZ 5.3L 102xxx
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#3
01-18-2011, 08:04 AM
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Re: Knock
Nothing in Oil during changes. More like a single knock like rod or mains, but with a stethescope I hear nothing at idle and I am having trouble locating the culprit. This morning i started it up and usually i have know at first start up, but this morning i had nothing it was smooth.
Do you think maybe it is the belt tensioner or the power steering pump? Tom
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#4
01-18-2011, 09:00 PM
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Re: Knock
could it be a flex plate cracked i have seen this on chevy were it sounds like a rod or main
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#5
01-18-2011, 09:19 PM
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Re: Knock
Second that one, I have seen this too.
__________________
10 hours away from John Deere master certified also master certified ASE tech. Exp. in both. Went to school for cars, wound up staying with Deere dealer for a while, so schooling there too. Also couple years exp in GM and some GM training Gave up wrenching for "Greener Pastures" Current job: RN 2010 Silverado Z71 5.3L 65xxx Wife's 2007 Suburban 1500 LTZ 5.3L 102xxx
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