engine rattle Perkins gas

nophun · May 12, 2017

I have a rattle in my engine, wouldn't call it a knock. It's too fast for a rod or piston knock I think, too loud and low toned for valve play (not clacking), sounds high and forward on the engine. Oil pressure is excellent, didn't react to adjusting the timing at all (it was retarded). If it were a higher pitched noise, I'd be thinking a valve play.

Any common known issues that cause this sort of sound on these engines? Can the water pump or the governor make this sort of sound? Any ideas before I start tearing the engine apart?

nophun · May 12, 2017

Just wanted to add that I'll pull the plugs tomorrow to see if that reveals anything.

ptfarmer · May 12, 2017

The camshaft, oil pump, power steering pump if it has it are all gear driven on the front of the engine. It could possibly be one of the gears that's making the noise you are hearing.

nophun · May 12, 2017

That is the kind of sound it is: warped pulley, too much endplay somewhere, worn crank thrust bearing would be familiar sounds.

It sounds much more like a rotational rattle than what the typical rod knock or piston slap would sound like....guess I'll start digging deeper tomorrow.

ptfarmer · May 12, 2017

If you had one of the stethoscopes you can get at a auto parts store, or use the long screwdriver trick to listen to certain places of the engine. That would be the best thing to do before you tear into it so you will have a better idea of where the noise is coming from.

centash · May 13, 2017

Run it with the fan belt off, may help to isolate the noise source. Ben

nophun · May 13, 2017

Todays update: Pulled belt, turned crank pulley and sound remains. when I turn it by hand, it clunks in both direction and sounds like it is coming from the area of the crankshaft. Pulled oil filter, cut it open, no metallic particles in there, just a couple tiny pieces of what looked like hard reddish plastic, about the size of coffee grounds.

If I was to guess at first hear, I'd say the #1 rod bearing, but my experience would say that the oil filter would have been full of metal shavings. It looks like disassembly is inevitable, kinda bummed out since I really wanted to put it to work before it got hot out. Heading out on vacation in a few days, I'll wait till I get back to do any more disassembly.

A question for those experienced: any negative to switching over to the spin-on filter kit??

ptfarmer · May 13, 2017

Put a spin-on filter on it, the problem with the canister type filters is that sometimes the part(s) that are needed inside of them get lost. When put back on with part(s) missing makes the filter useless.

nophun · May 13, 2017

Thanks, sound advice. I'll go ahead and order the kit.

Tony in Mass. · May 14, 2017

A few years ago, someone brought to my attention, the danger the spin on filter was in, the way Perkins hung it below the front axle's low spot. A steel canister would be safer in the woods or bush. Depends what you are doing with it, mine mows lawns with no hazards down there.
Now, remember this is a diesel design converted to burn gasoline. It will sound and act like a diesel. It 'may' not have a problem at all. I have 2 perkins gas, I just got used to em acting the way they do.

ptfarmer · May 14, 2017

If you are that careless to damage a oil filter to the point that you ruin a engine you shouldn't be on a tractor. The construction company I worked for they would make you work a shovel, and do other manual labor jobs for a couple of months (or you could quit) for being that careless. Good equipment operators always pays attention for things like that.

engine rattle Perkins gas

nophun

Member

nophun

Member

ptfarmer

Well-known Member

nophun

Member

ptfarmer

Well-known Member

centash

Well-known Member

nophun

Member

ptfarmer

Well-known Member

nophun

Member

Tony in Mass.

Well-known Member

ptfarmer

Well-known Member

Similar threads