Question about 1995 Isuzu Rodeo

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95 isuzu rodeo engine knocking noise that goes away at high rpms

Hi, I have a 1995 Isuzu Rodeo 3.2L SOHC there is a loud tapping sound coming from the passenger side of the upper half of the engine. The sound increases in speed with increasing the RPM's however once it reaches approx 4000-4200 the sound completely goes away. this happens with or without a load on the engine or in other words while driving and in park. Have any ideas?

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  • Sam Smith
    Sam Smith Jul 26, 2009

    would a bad fuel injector make a very hard loud knocking noise

  • Sam Smith
    Sam Smith Jul 27, 2009

    Thanks for the info makes sense to me i will try it and see if it works thanks

  • Sam Smith
    Sam Smith Aug 11, 2009

    Jeff thanks for your info the problem was the timing belt tensioner hydralic unit



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You probably are hearing a lose rocker arm as result of a lifter failing to pump up.The high rpms increase pump pressure and speed which helps it pump up and reduce the clearance. Before replacing this lifter(s) ,you might try an oil additive which has been known to revive a bled down lash adjusters or lifters.I've actually seen this stuff work as you pour it in. There are several on the market and everybody has a favorite,but the best I ever saw was a product called" lifter quiet" and it was a loose,watery dark graphite fluid that found its way into those lifters very fast. I would run a low viscosity oil no thicker than 5w30 and possibly 5w20 as this thin oil helps pump up lifters.With this additive and thin oil,run this vehicle under load and the higher rpms you were mentioning.If your lucky,it might help pump up and keep this lifter pumped up. Otherwise if you are faced with replacing,install the new lifter primed(pre-pumped) as even new lifters can be difficult to pump up.

Posted on Jul 26, 2009

  • Jeff Barton
    Jeff Barton Jul 26, 2009

    Try 1 quart of Rislone with oil change.Second choice would be Seafoam additive.Cant find the "lifter quiet" anymore...too bad



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What causes a squeaky sound from the engine of an 2000 Isuzu rodeo when engine is running?

it could be one of the belts. if you put a little wax or brake fluid on the belt in a couple of places and the squeak goes away then you either have a loose belt/s or the belts/s need replacing. if no change it could be the timing belt making the noise.

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Firing order for 1995 isuze rodeo

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Aug 26, 2010 | 1995 Isuzu Rodeo

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Had the engine replaced three weeks ago, and now, there is a minor knocking sound coming form the engine.

Sounds like your Rodeo was taken to the circus. No warranty on that new motor? I need to know where the sound is coming from. Top, bottom, front rear or what. Is it a tapping or hard loud knocking??? Let me know and I will try to help you out. Raz

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I have a 94' Isuzu rodeo with a fast tap

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Oct 26, 2009 | 1995 Isuzu Rodeo

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Need firing order for 95 isuzu rodeo 2w. 6 cylinder

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3.2 liter SOHC V-6 (6VD1)94723308.gif

Oct 08, 2009 | 1995 Isuzu Rodeo

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I have a 95 Isuzu rodeo. The engine makes a loud, almost diesel engine noise. When I am accelerating, the noise seems to go away. When I was shopping for this vehicle, I saw many ads that said their's make...

ATTENTION!! Do not run the engine if you do not want to have to buy an engine!! I just solved this problem with my own 95 Rodeo the problem you are having is common on 95 rodeo with 3.2 L engine. Failure of the hydralic timing belt tensioner will allow the tensioner pulley to knock against the top of the tensioner unit ( inside timing cover lower left side of crank pulley little cylinder looking part ) held in by 2 bolts when you take it off if you can depress the button its bad . Dealer has part for $110.00, so go to auto zone but they dont have it listed for 95 rodeo have them look up timing belt tensioner for 95 honda passport $76.95 takes 2 days VDO (Vendor Order only) not a very hard job have fun dont forget to change the timing belt and water pump for good measure after the complete job is done you should not have to worry about it for another 70,000 miles.have a good day

Aug 03, 2009 | 1995 Isuzu Rodeo

2 Answers

Knocking when started,noise disappears in higher gears.

try an oil change my brothers isuzu used to do that and he did an oil change resulting in a fix. If it gets worse you could have a piston shoot through the oil pan.

Apr 11, 2009 | 1996 Isuzu Rodeo

1 Answer

Engine knocks 3.2 isuzu rodeo 2000 ? help

You don't say how many miles or give a service history, but, that said I would check the timing belt and tensioner. When tensioner goes bad is often is reported as a loud knock or tick. Usually most evident at low RPMs. Another low cost try is to use a can of seafoam in the oil now, run it a few miles, then change it for a high detergent, low viscousity oil and drive it a while to see if the lifters clean up. engine tick is very common, generally due to lifters oil passages getting sludged up a little for 2nd gen 3.2l's

Feb 18, 2009 | 2000 Isuzu Rodeo

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