Time to Fix Knock
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New User
Joined: May 2008
Posts: 3
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Time to Fix Knock
Well my truck, 1996 F150 5.0 2x4, has had a knock for probably about one and a half years now but driving it every day it has always ran great and had plenty of power. The knock has never gotten any worse since it started. Ive put new lifters in it and everything is fine in the top end. The knock is loudest when you let off the gas and slow down. Has anyone every had this problem with their truck?
Super Moderator
Joined: Apr 2004
Posts: 34,519
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Lots have had this problem & it usually lasts 1 and 1/2 minutes, sometimes 1 and 1/2 hours before the rod leaks out of the block. This thing still firing all 8?
When it does come down, it's time for a full rebuild, not just fixing this knock.
You ready to replace or rebuild?
When it does come down, it's time for a full rebuild, not just fixing this knock.
You ready to replace or rebuild?
Junior User
Joined: Apr 2007
Posts: 72
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From: st.thomas
mine had a loud knock and it was checked out this morning, the mech. thought it was the crank, when we removed the srp.belt and fired it up it ended up being the airpump,,it pays to check very good before rebuilds,,saves a lot of money
