Question about 1996 Isuzu Trooper

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KNOCKING MOTOR! WHEN YOU START IT THE MOTOR KNOCKS, RED LINE IT A FEW TIMES AND IT STOPS.

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THis sounds like the pressure relief valve near the oil filter is acting up. Have you put very heavy oil in it?? Is this an auto trans or manual? You sure didn't do it good reving it! O My Anyway, after you red line it and let it idle,is the prob still there?? Frankster016

Posted on Oct 25, 2008

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2005 mazda4cycl over head cam knocking noice like a lifter noise or bent rod when reving but noice cycles knocks a minute an stops for a minute an starts and stops


Hi Troy I owned a motor bike years ago and I had the same problem, It would start off with a quiet knocking sound and get louder then suddenly stop but start up quietly again and again and so on which turned out to be the timing chain was worn.... SERIOUS mate. Good luck......

Apr 17, 2016 | Cars & Trucks

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I have a 91 caprice make knocking noise when I crank it


if auto , check the flex plate at the torque converter for cracks
check ring gear for burrs
possible big end bearing
possible piston or broken ring
test by removing a plug and cranking it replace the plug and go to the next plug
repeat the process until the knock stops with that plug removed

Apr 23, 2015 | 1991 Chevrolet Caprice

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Motor noise


As long as it goes away within a few seconds don't worry about it. If it was a bearing problem it would knock every time it was started cold, not just now and then.

Apr 17, 2014 | 1994 Chevrolet Astro

1 Answer

Does a 99 lincoln have a knock sensor?


On both cars the knock sensor is located in the intake valley.
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the computer receive signals if engine knocking and adjust the timing till stop.Before replace the sensors make sure the engine have no other misfire ,bad gas or vacuum leak.plug scan tool and read the code.Only circuit problem will be a true knock problem. Inspect all wire connectors before start taking a part.

Mar 28, 2014 | Lincoln Cars & Trucks

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Sebring 2004 engine knocking


Well it could be something in the timing components but I doubt it.
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Feb 28, 2013 | 2004 Chrysler Sebring

1 Answer

MOTOR KNOCKS, RED LINED it .1990 trooper 2.8 v6 whats the knocking coming form


If you red-lined it the most likely cause of a knocking noise is a spun bearing on the crankshaft. That means that a bearing has turned inside the bearing cap and is now restricting the oil flow. This will ruin your engine fairly quickly. The bottom end needs to come apart and the longer you drive it the worse it will get. Hope this helps.

Sep 13, 2011 | 1990 Isuzu Trooper

1 Answer

2003 Volvo S40 1.9T. when I start the car in the morning the engine knocks during 40 seconds and then it stops knocking and it operates properly without knocking. what should I do to have this knocking...


well this happens because the oil drains to the pan when sitting for a long time so when starting it takes a few for the oil pump to go though the motor this is normal best thing i could say is to buy some zmax or duel lube to help it from friction in the first start up.

May 17, 2010 | 2003 Volvo S40

2 Answers

Knock in engine


it can also be an injector. injectors tend to supply more diesel after long service. To check if this is the problem: let the motor idle whilst it knocks. start from the front of the motor- loosen no1 injector fuel line- the motor will start idling roughly as fuel supply to no1 piston is starved. If the knock persists, tighten the fuel line and move to no2 injector and repeat the process. the knock will gradually go away if one of the injectors' fuel lines are loosened and the injector is faulty. If you get 1 or more injectors with these symptoms, remove and replace the injector. If the problem persists, it can either be that one of the diesel pump plungers are worn and supplies too much fuel or a big end bearing is faulty.
RegarsCarel de BeerSouth Africa

Apr 06, 2009 | 1991 Toyota Celica

1 Answer

My car is making this weird knocking noise and people tell me its the timing chain it wont go over 40 mph now it drove fine till i had it out one day and it lost power and started knocking it still runs...


The rod knocking is caused by loss of oil pressure. Did the oil light not come on? That light is red, red means stop. Do not start this engine again until the problem is corrected.

Have you checked the oil level?

Mar 16, 2009 | 1994 Pontiac Grand Prix

2 Answers

Engine knocking.


Hi,my 92 prado started making a knocking sound recently,we couldn't pin it down to one spot in the engine.
The knocking was constant at low revs and then disapeared.
Turned out to be the tourque converter knob had bust of and eventually destroyed the fly wheel and the transmission pump.
Definatley check under top cover and also drop off the sump to check for loose nuts etc.
hope this helps.

Dec 27, 2008 | 1992 Toyota Land Cruiser

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