4x4Wire TrailTalk

Possible causes for a knock

Posted By: 4ePikanini

Possible causes for a knock - 05/07/09 12:36 PM

3.0L 12v V6 engine in a pajero.

at idle there is a deep sounding knock at about 3 knocks per second.

When driving on the open road and there is no load on the engine it goes quiet but knocking comes back under load.

Any hypothesis on what can attribute to this noise?

Im doing major service over the weekend but if i need to open the engine then I might just as well pull the motor and do it all at once.

TIA <img src="/forums/images/graemlins/cheers.gif" alt="" />
Posted By: rxinhed

Re: Possible causes for a knock - 05/07/09 04:07 PM

Welcome to the 4x4Wire!!

Deep knocking is never a good sign. Try adjusting the valves, look at the harmonic balancer for wobble, be open minded. I purchased a snazzy Gen I Montero for my wife last summer, it has bad rod knock.
Posted By: 4ePikanini

Re: Possible causes for a knock - 05/07/09 09:32 PM

Short video here to help me out please. <img src="/forums/images/graemlins/scared.gif" alt="" />

Thanks

video

use vlc player to view if you can't view - www.videolan.org
Posted By: Temple

Re: Possible causes for a knock - 05/08/09 01:21 AM

SEAFOAM!!!!! ......... if that dosnt fix it nothing will............ try beating it thats what i did with a bad oil pmp.............hmmmmmmm never mind i had to put a new engine in my truck.. lol <img src="/forums/images/graemlins/shiner.gif" alt="" />
Posted By: grass13

Re: Possible causes for a knock - 05/08/09 02:48 AM

welcome to the wire.
bad rod bearing <img src="/forums/images/graemlins/frown.gif" alt="" />.
but on the plus side, your in the land of pajeros... or atleast right next door.
ps. you need to park it until you find and fix whatever it is.
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