Question about 2001 Harley Davidson FXD Dyna Super Glide

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A loud knocking coming from crankcase - 2001 Harley Davidson FXD Dyna Super Glide

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When? Under what circumstances?

Posted on Nov 15, 2014

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I have a 94 Oldsmobile cutlass Ciara when I start it I hear a loud knocking sound smoke coming from oil dipstick tube and idles real hard please help me with this issue


Smoke from the dipstick tube is potentially bad news especially if it puffs like an old steam train.

Clearly further checks are needed to make a complete diagnosis but the initial indication is a problem with a piston or pistons or broken or badly worn piston rings allowing an excessive amount of combustion gas to escape into the crankcase.

Aug 10, 2016 | Oldsmobile Cars & Trucks

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My 84 toyota truck engine 22r has a valve knock. when i start my truck i hear a loud knock coming from the head.do i need to adjust the valves?


check the valve adjust and see if one valve is lower/higher than the rest. The valves are hydraulically adjusted and if the knock is really loud watch for a slight miss at rpm's. The only thing that will give a loud noise is a loose valve seat insert. You may pick it up with a compression test.

Feb 26, 2014 | Cars & Trucks

1 Answer

Loud Knocking noise coming from engine


Most likely the engine harmonic balancer on the front of the crankshaft is coming apart. This is a fairly common issue.

Nov 06, 2013 | 1995 Buick Riviera

1 Answer

I just changed the spark plugs & wires on my 95


Oil change 5W/30 and Wynn's thin oil in crankcase . One bottle injector cleaner .to Gas tank .

Jan 23, 2013 | Cars & Trucks

1 Answer

Engine blew up on 2nd season of use, only 40.8 hrs. of run time.


Check the engine crankcase bolts have not come loose, i have seen this on some Briggs engines.

Sep 10, 2012 | Garden

1 Answer

2001 isuzu tropper 3.5l 4x4 engine runs but loud knock changed oil and still has loud knock can i just change the oil pump or do i need to change whole engine


If you are hearing a loud "knock" and it is coming from the bottom of the engine you probably have a bad crankshaft bearing(s) which means engine rebuild or replacement.

Feb 19, 2011 | 2001 Isuzu Trooper

3 Answers

Loud knocking coming from the bottom end and now loss of power sludge build up i have changed oil normal every 2500-3000 miles with synthetic and slick fifty.


the engine probably has a bad bearing in it.oil sludge can be caused by short trip driving,overheating,pluged crank case vent or pcv system not working.the power loss due to the computer retarding ignition timeing due to the knock sensor producing a signal from the engine knock.regardless an ongine ocerhaul or replacement is neede.
but first make sure that the bell housing bolts,torque converter bolts are all tight.
make sure the knock isnt from the catalytic converter
check for dents in the oil pan
check engine accessorys for noise such as water pump.power steering pump,alternator,a/c compressor.and all attachment bolts

Apr 04, 2010 | 2000 Dodge Durango

1 Answer

Loud knocking oil in the spark plugs


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

Aug 12, 2009 | 1993 Honda Accord

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

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