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  #1  
Old 11-16-2010, 03:35 PM
ssptank ssptank is offline
06Ranger4x4
 
Join Date: Dec 2009
Posts: 26
Default Knock noise at start-up

I have a 2006 xlt 4.0 and i just changed the cerp belt. now everytime when i start my truck I hear a knock noise. I hear that one knock noise and then it goes away. Please help
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  #2  
Old 11-17-2010, 05:48 PM
ssptank ssptank is offline
06Ranger4x4
 
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Default Re: Knock noise at start-up

can I or should I loosen my belt tenisior?
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2006 XLT 4.0 SOHC.
air box mod
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  #3  
Old 11-18-2010, 05:14 AM
crowdpleazer crowdpleazer is offline
^thats what they call me^
 
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Default Re: Knock noise at start-up

i dont think thatll help. where does the knock come from?
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1998 ranger extended cab, 2wd, 4.0 ohv, 5 speed, sony xploid 52 4 way watt radio, 2 pair of pioneer 240 watt speakers, Cobra 29 LX LCD CB radio pushing 100 watts, k&n air filter, 15 inch exploder wheels, dual exhaust with 4 inch stainless tips, 2 12 inch subs with a 1000 watt amp just for the hell of it!

new project: dirt track modified racing at the local saturday night track.
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  #4  
Old 11-20-2010, 05:23 PM
MR MORROW MR MORROW is offline
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Default Re: Knock noise at start-up

it is your hydrolic lifter in your vaulve train, the lifter if bleeding off presure(oil leaking out) and causing your lifter(s) to knock when you start the truck. all motors will do this every now and then. even new ones do it. you may need new lifters if it becomes a serious problem and knocks really bad. you can also try switching to a lighter weight oil which means it will start better, but the lifters will bleed off faster causing the knock to happen more often, but it wont knock as long... i wouldnt worry about if for now
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  #5  
Old 11-21-2010, 05:35 PM
ssptank ssptank is offline
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Default Re: Knock noise at start-up

It is just one clunk/knock right at start up...
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2006 XLT 4.0 SOHC.
air box mod
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  #6  
Old 11-21-2010, 08:23 PM
crowdpleazer crowdpleazer is offline
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Default Re: Knock noise at start-up

slick 50
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1998 ranger extended cab, 2wd, 4.0 ohv, 5 speed, sony xploid 52 4 way watt radio, 2 pair of pioneer 240 watt speakers, Cobra 29 LX LCD CB radio pushing 100 watts, k&n air filter, 15 inch exploder wheels, dual exhaust with 4 inch stainless tips, 2 12 inch subs with a 1000 watt amp just for the hell of it!

new project: dirt track modified racing at the local saturday night track.
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