Engine oil pressure drops when hot

[greg_g]

Overfilling presents the potential for problems if it's run that way too long. If you caught it right away - and drained out the excess - you probably just need to work the engine real hard to burn off the spillage.

The breather element is probably saturated. And if it's never been cleaned, it's probably caked with oil-soaked dirt. Take it completely off the engine, and give it a good wash with diesel fuel. Be prepared to cut a new gasket for where it bolts back onto the engine.

//greg//

 

[quicksandfarmer]

So I changed from 20W60 to 5W30 (very expensive gold plated diesel oil) - no difference.

15w40 is what my Jinma calls for. Last summer by mistake I bought some 5w30 and I changed it out almost immediately because the oil pressure was so dramatically lower.

 

[FotonOwner]

Overfilling presents the potential for problems if it's run that way too long. If you caught it right away - and drained out the excess - you probably just need to work the engine real hard to burn off the spillage.

The breather element is probably saturated. And if it's never been cleaned, it's probably caked with oil-soaked dirt. Take it completely off the engine, and give it a good wash with diesel fuel. Be prepared to cut a new gasket for where it bolts back onto the engine.

//greg//

Greg,
Thanks, I looked in the engine book and it suggests the engine will overheat if the oil level is too high. It didn't run for too long but there would be heaps of oil in the breather element. It is reasonably clean so I will get rid of the oil in there.
The specs also say the minimum hot idle oil pressure should be 0.05 which you could not tell from zero on the gauge. So maybe it is okay and I just get used to the light coming on.

 

[Diamondpilot]

Greg,
Thanks, I looked in the engine book and it suggests the engine will overheat if the oil level is too high. It didn't run for too long but there would be heaps of oil in the breather element. It is reasonably clean so I will get rid of the oil in there.
The specs also say the minimum hot idle oil pressure should be 0.05 which you could not tell from zero on the gauge. So maybe it is okay and I just get used to the light coming on.

At this point you need to clean the breather, get the oil level to the proper setting, and get a test gauge installed and verify what the oil pressure is both warm and hot and make notes.

Chris

 

[IH3444]

If I read your post correctly you went from a 20w-60 oil, to a 5w-30? Have you tried to just use a straight grade diesel oil, say 30w, or 40w? Sound like you really have some lower end problems, which will mean dropping the pan and pulling rod caps, checking bearing for wear, and measuring the crankshaft. See 3RRL post about doing the lower end on his KAMA 554. This will get you informed as to what you are getting into. Hope it works out, and is a simple fix.

 

[adnan]

I had one few years back, cost me more than the tractor to mechanics.

 

[Diamondpilot]

I had one few years back, cost me more than the tractor to mechanics.

What are you talking about?

Chris

 

[IH3444]

He's talking about owning a chinese tractor, and all the adventures he had with it that cost him dearly.

There, another mystery solved, tell Robert Stack to stay in bed today.

 

[Rich Waugh]

Don't feed the trolls.