Changed from 5w to 10w, instant knock

[drarkansas]

I've got a 99 Ranger S/C 4x4 w/ 118,000 trouble-free miles. Tonight, I changed my oil. Decided to go with a 10W30 instead of the usual 5W30. I cranked it up when done and noticed what sounds like a knock coming from the general area of the oil pan. I've been changing my oil for years and have never come across anything like this. Any ideas??? Thanks for your help.

 

[mikemc]

Hmmmm...10w30 shouldn't hurt that motor in any way. Is the oil level too high on the dipstick?

 

[HardbodyLoyalist]

I assume these were both dino oils. Were they the same brand? What brand(s) were they? Did you use the same oil filter?

 

[kickster]

no oil would cause knocking noise.
I used 20W50 in -30C and engine did not make any noise!

I think you have a mechanical problem that showed up at exact time as your oil change. I highly doubt that oil is the cause of your noise.

 

[seotaji]

sludge clogging the oil pickup?

dent in the pan causing oil starvation?

 

[oilpan49]

Hey,

I own a 98 Ranger with the 2.5L 4banger. What kind of oil are you running, and what's under the hood of your Ranger?? Maybe needless to ask but just out of curioisity,,,AR

 

[OffOrWFO]

Did the noise go away after a few seconds? If so it's just a temporary lack of oil pressure while the filter gets filled, which is normal. Usually it's top end noise that makes the rattle, not rods and mains.

 

[mechtech]

How about the possibility of an incorrect/improperly metered oil filter? Possible anti-drainback valve problems?

 

[jorton]

Did the filter gasket come off with the old oil filter?

 

[Dr. T]

Same brand and type of oil? When is the knock present...at start-up or all the time?

I too have increased valve knock that I believe is a result of an interference somewhere in the engine due to many mi's of thinner oil use. In other words, sludge/varnish are responsible for the knock unless there are also underlying mechanical issues....