Question about 1998 Cadillac Catera

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1999 cadillac cateria, oil was low, put oil in. made a knocking sound. turned it off and now the knocking noise is really loud.

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U have a burnt out connecting rod bearing, u will need to replace/rebuild the engine

Posted on May 27, 2010

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Posted on Jan 02, 2017

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Low oil pressure and stop engine light after changing battery and alternator hear knocking now


I see more than one issue in your story. Its possible the computer lost memory and will need to relearn. But that would not explain the knocking noise. The oil pressure warning might explain the noise if oil pressure really is low. Running without the belt for even 5 min would not cause the problems you describe.
I would focus on the low oil pressure warning and the noise first.

Feb 02, 2014 | 1997 Cadillac DeVille

1 Answer

1999 Firebird knocking then stall


Well CB....a knocking noise coming from the engine is never good news.

Typically any real ugly noise that stops an engine from running is catastrophic. With the info you provided...low oil pressure, excess oil in the pan, knocking engine sounds and a motor that will now, not turn over...sounds like a bent con rod caused by a failed main bearing.

1999 v6 pontiac exploded dia-homgkn40kjilovpbxhhmhqzq-1-0.jpg
The engine overheated so the first suspect is the cooling system, some engine designs require that the thermostat be installed with the vent or bypass hole in a certain position. Failure to position the thermostat properly can cause engine overheating.

Another cause of the dreaded knock is "Knocking and pinging" caused by a low fuel octane rating, carbon deposits on cylinder walls or incorrect spark plugs... all not good. I think you would have noticed if your motor was knocking and pinging for any extended period of time.

Excess oil in the pan gets frothed up by the crankshaft slapping it around and aerates the oil which decreases its shear strength, which is what keeps metal parts from contacting directly together.
This could ruin the main crankshaft bearings.

First thing I would do is remove all the spark plugs (to reduce engine compression) and place a socket on the crank pulley bolt and try to turn the engine over...you should be able to spin the crank....if you can't get the motor spinning..it's seized up.

Good luck !

Mar 07, 2017 | 1999 Pontiac Firebird

1 Answer

Knocking noise upper passenger side 99 expedition


have you changed the oil since it was rebuilt?? 2 quarts low is a lot. not suprising you may have a bad lifter

May 08, 2017 | 1999 Ford Expedition

1 Answer

Not getting oil to the pistons. Making knocking noise. Wont stay on.


Hello
Has the engine been run low on oil? Does the knocking get louder as the engine warms up? Have you had a automotive technician listen to this noise? Pistons don't really knock, the bearings in the engine called the crankshaft and piston connecting rod bearings do make a loud knocking noise, if that is the case the engine must be removed from the car and rebuilt.

Sep 23, 2011 | 1998 Honda Civic

1 Answer

Started off with a slight knock a few weeks ago,now is a loud grinding noise like a really dry bearing.its a 1998 hatch,manual.camt find where to check gearbox oil


Hello, With so little information, I would HAVE to assume that this is a rod knock. Does it make noise in neutral too? Or only when you drive it. Try to put it in neutral and step on the gas....Does it still knock? A rod knock means you need to rebuild that motor. A rod knock can usually happen from beating on the car or a timing belt slipped a couple of gears. I would check your engine oil level, not transmission. Because low levels of engine oil can create this sound too. Good luck and feel free to write me back with much more detail so that I can further assist you.

Feb 17, 2011 | Nissan Pulsar Cars & Trucks

1 Answer

The engine is making a really loud knocking noise and the oil light is on. it also smells like something is burning or running hot


Doesn't sound good. Check oil level. Also check for metal in the oil once you pull the dipstick. A loud knocking noise is a sign of a blown engine may be you spun a rod in which case you would need engine replacement or rebuild

Oct 23, 2009 | 2001 Dodge Stratus

1 Answer

Mysterious knock from motor


the noise is characteristic of this 4.1 liter ht4100 engine. the problem lies in the #1 main bearing clearance. this noise is very common on this engine and will clear up when replacing #1 main bearings but might return after you put some miles on it. i fixed a lot of these as a cadillac tech for many years. good luck!!

Sep 04, 2009 | 1983 Cadillac Eldorado

1 Answer

Loud ticking noise


Ticking is generally associated with a valvetrain problem but may be caused by low oil level or pressure. Noise is in the upper half of the engine. Knocking is from low oil pressure and is caused by worn bearings causing pressure loss. Knocking is the worse of both conditions (means overhaul or engine replacement.) Ticking needs to be checked for it's cause...if cause is low oil pressure, remember...oil pumps don't cause low oil pressure, pressure will lost if bearings are worn or pump inlet screen is plugged with carbon.

Jul 18, 2009 | 1999 Jeep Cherokee

1 Answer

Engine is making loud noise from rocker cover area. oil pressure


tapets or camshaft has gone, check them out before you start it again

Jun 06, 2009 | 1999 Cadillac Catera

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