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will a bottom end bearing get louder as the truck warms up?
Posted: Thu Jul 24, 2014 8:49 pm
by peanut.901
hi there my pajero is making a tapping/knocking sound i cant pin point where it is coming from you can hear it clearly when laying under the car and can here clearly from the rocker covers. could it be tappets making the noise ? it gets louder as the vehicle warms up which is confusing me any ideas be awesome thanks. my pajero is 2.5 turbo diesel
Re: will a bottom end bearing get louder as the truck warms
Posted: Thu Jul 24, 2014 8:51 pm
by derk
what's your oil pressure doing
Re: will a bottom end bearing get louder as the truck warms
Posted: Thu Jul 24, 2014 9:32 pm
by Crash bandicoot
Take the rocker cover off and inspect the valve train. If its that bad you will soon figure out which one when you wiggle it. Failing that. Big end bearing. But that,ll be more like some one banging a hammer to metallica.
Re: will a bottom end bearing get louder as the truck warms
Posted: Thu Jul 24, 2014 9:32 pm
by Crash bandicoot
Excuse the pun.
Re: will a bottom end bearing get louder as the truck warms
Posted: Thu Jul 24, 2014 9:39 pm
by peanut.901
ive had rocker cover off and there is afair bit of movement in the lifters i need to get clearance done it also miss fires abit. but will lifters get louder when warm?
Re: will a bottom end bearing get louder as the truck warms
Posted: Thu Jul 24, 2014 9:40 pm
by peanut.901
i dont have a oil pressure gauge but no oil lights or check lights have come up on the dash
Re: will a bottom end bearing get louder as the truck warms
Posted: Fri Jul 25, 2014 9:02 am
by Marco Polo
I just replaced a noisy rocker on my 4d56. Definitely gets louder when warm. It was failing due to collapsing bearing in the roller. It was very obvious after I slackened all the adjusters and wiggled the rollers.
Re: will a bottom end bearing get louder as the truck warms
Posted: Fri Jul 25, 2014 10:56 pm
by cornflake
should post a video or audio
Re: will a bottom end bearing get louder as the truck warms
Posted: Mon Jul 28, 2014 6:53 pm
by peanut.901
ive done tappet clearance and noise still there could you give me some more info on the rocker arm bearing
Re: will a bottom end bearing get louder as the truck warms
Posted: Tue Jul 29, 2014 9:59 pm
by Marco Polo
peanut.901 wrote:ive done tappet clearance and noise still there could you give me some more info on the rocker arm bearing
Take the rocker cover off. Are any of the adjusters wound noticeably further in? If they are that's good reason for suspicion. Otherwise, back off all the adjusters so the rockers are all loose, then just check for play in the rollers. If you have a loose one it will be very obvious. Mine was so bad, I ran out of adjustment on number 3 exhaust rocker which was the give away. Sounded like a rock bouncing around in the engine .