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OK, so I bought this truck not too long ago, i'd say 3 months ago. It's a 1992 d21 hardbody pickup with the 2.4 ka24e engine. sohc. The truck now has 148,000 miles on it. I changed the oil in the engine, and put 10w-40 high mileage oil in it as it was burning a little and i was told heavier wouldn't hurt it. My father also insisted on putting a quart of that lucas oil stabilizer in the engine, that thick honey looking stuff.
Anyways, after changing the oil. I of course, let the engine run for a while. After about 5 minutes of running though, I started hearing a rattling noise coming from the valve cover. It only makes this noise at idle. I know this is not the timing chain rattling. Sounds kind of like a marble in a tin can. Could the oil have been too thick? The oil pressure light went off after a few seconds of running, say maybe 3 seconds. THe engine doesnt seem to be burning any oil anymore at the present time.
Again, the engine rattles on startup when cold, which i know is the chain. That goes away quickly though. The other rattle occurs only when the engine is warm, NOT COLD. and is located near the back of the valvecover, not the front. IT doesn't do it until it seems the engine oil has warmed up some. IS it possible that the people i bought the truck from put 20w-50 in the engine to quiet the noise so they could sell it? I know it's a valvetrain issue.... Any ideas? This is worrying me. It is fall now, and the temperature averages 60 to 70 degrees right now in mid morning.
Anyways, after changing the oil. I of course, let the engine run for a while. After about 5 minutes of running though, I started hearing a rattling noise coming from the valve cover. It only makes this noise at idle. I know this is not the timing chain rattling. Sounds kind of like a marble in a tin can. Could the oil have been too thick? The oil pressure light went off after a few seconds of running, say maybe 3 seconds. THe engine doesnt seem to be burning any oil anymore at the present time.
Again, the engine rattles on startup when cold, which i know is the chain. That goes away quickly though. The other rattle occurs only when the engine is warm, NOT COLD. and is located near the back of the valvecover, not the front. IT doesn't do it until it seems the engine oil has warmed up some. IS it possible that the people i bought the truck from put 20w-50 in the engine to quiet the noise so they could sell it? I know it's a valvetrain issue.... Any ideas? This is worrying me. It is fall now, and the temperature averages 60 to 70 degrees right now in mid morning.
