Engine knocks...?

Question

I have a 1984 ford f-150 302 5,0 liter 2bbl and the engine knock what could cause it and how could i fix it??

Also my oil smells a little like gas is that a indication of a major problem?? or is that the oil was supposed to be replaced at 79,000 miles and it is now at 82,000 miles its been in there for 8,000 miles.

and can anyone tell me where i can here a sound of an actual engine knocking

Answer 1

marbles in a tin can? sounds like lifters. get that oil and filter changed, now. i believe it has hydraulic lifters, and oil that dirty can plug them up, hence the rattling. that is typically a really good trouble free engine. b take care of it.

Answer 2

i've come across this before. most common problem was a bad fuel pump. they are mounted on the engine block and a seal occassionaly goes out causing it to spray fuel into the engine lubricating system (oil). the think you'll notice is that the oil level keeps getting higher and higher and yes it does smell of fuel. it's cleaning your engine but really thinning out your oil hence the engine knock. need to get it fixed really fast before more damage occurs. they have also been known to detonate, and i don't mean a gas knock i mean they will blow the oil pan right off.

Answer 3

if it is an actual knock the answer is almost always a rod bearing if it is more of a ticking or tapping sound there are several possibilities lifters, valve adjustment, cam wear, timing chain, etc. a length of hose held to your ear and moved around till you find the source is a great way to narrow it down

Answer 4

Go to a higher octane fuel or change the timing.

UPDATE: The knocking I'm referring to sounds like marbles in a tin can.

Answer 5

have u checked your oil lately??? your engine will start to knock due to lack of oil lubricating the engine which leads to a seized engine