Question about 1993 Honda Accord

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Loud knocking oil in the spark plugs

I got a loud knocking noise coming from my engine and my spark plugs are covered in oil idk what to do

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Do a wet/dry compression test and determine if it's the piston rings or the valve seals.

Posted on Aug 12, 2009

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Idk if I have rod knock? I wanna be hopeful it's something else? There was no warning noise, smoke, engine lag...nothing. Then BAM! Loud knocking while I was driving along...car didn't die, no major oil...


lift the bonnet and look for the obvious, like a broken drive belt
to the alternator etc
If you damaged the engine it will be rough running , banging itself apart, smoking so from your description, poor as it is I would be looking for ancillary parts failure, tire failure , cv joint failure or something like that

Aug 03, 2018 | Subaru Cars & Trucks

3 Answers

My acura is making loud banging noise from front when idling. sounds like a missing spark plug but all spark plugs are fine. what could it be?


Can be a lot of things.

Could be a bad rod or rod barring.

Could be a clearance issue in a rebuilt engine.

I wouldn't run it until you Take it to a shop for diagnostic.

Nov 03, 2014 | 1998 Acura CL

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

2 Answers

I have a 2003 Chevy Impala. I ran my car with no oil and now I'm hearing a loud ticking/knocking noise coming from under my valve cover. I added 2 bottles of oil after finding out that I didnt have any...


might be the valves have been damaged running without oil
- or the crankshaft / camshaft / main bearings
most probably you have to let the engine be rebuilt by a mechanic
(expect cost of more than US$ 2.000)
or get another (used) engine at a scrapyard 2003-chevy-wutfveiel3ypko01ydor435x-5-0.jpg 2003-chevy-wutfveiel3ypko01ydor435x-5-2.jpg

Sep 14, 2010 | 2003 Chevrolet Impala

1 Answer

97 SL2 dohc loud knocking sound coming from engine. sounds like somebody beating inside of valve cover with a hammer. compression checks ok. oil level is good. no obvious problems with cams or lfters that...


you have a ROD knock,,,,the oil level can be good and compression can be good,but the bearing on the rod to crank is shot and now has too much play and is causing excessive play and noise,soon the rod will come out the block and seize the engine,,if its knocking that loud then its too late to fix it,,your gonna have to replace the engine really soon,,,sorry but its normal of the dohc engine to do this usually between 90 to 130k miles they let loose but the single cam dont have this issue

Oct 24, 2009 | 1997 Saturn SL

2 Answers

Trying to figure out where the knocking is coming from, on engine


It all depends how loud the knock is. A tapping valve can be caused by low oil level, or dirty oil. Topping up or changing oil will solve the problem. A really loud valve tapping is abnormal. Cars sometimes make what you call a spark knock when accelerating hard. Extremely loud knock coming from deep within the engine is a bad sign, which means the engine has failed. Further examination would reveal metallic residue on the dipstick.

Jun 27, 2009 | 1994 Ford Thunderbird

3 Answers

Have a 1990 Z71 4wd that with loud engine knock.


I'd consider some fresh, clean oil & filter change first of all, if it hasn't been done . drive it for a while providing it isn't too bad, & see if it goes away, if not get back to us.

May 18, 2009 | 1990 Chevrolet C1500

2 Answers

Loud knocking or tapping sound when engine is cold


THIS NOISE IS PISTON SLAP..MOST NEONS HAVE THIS NOISE..HAVE SEEN THEM LAST FOR A LONG TIME..AS LONG AS IT GOES AWAY,IT SHOULD BE FINE

Mar 08, 2009 | 1998 Dodge Neon

1 Answer

Clicking noise


happened to our `89 voyager,

check to see if the cover where the spark plugs are(i think they are to the left of the engine) and see if they are zapping the side of the engine head itself. it happened to ours and simply had to replace the spark plug cover.

hope it helps.

Jul 11, 2008 | 1989 Plymouth Grand Voyager

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