smoke

Ranch_Hand_Supp · Jun 1, 2006

( ( The tube on top of the valve cover has nothing to do with the engine oil pressure or engine oil gauge reading. )

This is nothing I've personally witnessed Ron. But others HAVE reported tracking down a low oil pressure reading to a kink in that piece of clear hose. It's been mentioned in this forum and in others. Straighten out the kink, oil pressure indication on the gauge returns to normal. Don't ask me to explain it, I'm only reporting what I've read here and on other help sites.

//greg// )

//greg// , I don't know what to tell ya, not even sure why you are trying to give me your reason for your posting ??? I agree with RonMars post .... pretty good explaination of how the system works I think, based on my hands on experiance.

Maybe some of the members that posted crank case pressure effects engine oil pressure will chime in??? maybe they can explain it ??.

It's an opinion board ..... it's up to the reader to determine what they want to believe or do, IMHO..

Pauly, another thought I have ..... you have 170 hours, valve adjustment is in order if you have not already done so.

Ronald
Ranch Hand Supply

Ranch_Hand_Supp · Jun 1, 2006

( ( The tube on top of the valve cover has nothing to do with the engine oil pressure or engine oil gauge reading. )

This is nothing I've personally witnessed Ron. But others HAVE reported tracking down a low oil pressure reading to a kink in that piece of clear hose. It's been mentioned in this forum and in others. Straighten out the kink, oil pressure indication on the gauge returns to normal. Don't ask me to explain it, I'm only reporting what I've read here and on other help sites.

//greg// )

//greg// , I don't know what to tell ya, not even sure why you are trying to give me your reason for your posting ??? I agree with RonMars post .... pretty good explaination of how the system works I think, based on my hands on experiance.

Maybe some of the members that posted crank case pressure effects engine oil pressure will chime in??? maybe they can explain it ??.

It's an opinion board ..... it's up to the reader to determine what they want to believe or do, IMHO..

Pauly, another thought I have ..... you have 170 hours, valve adjustment is in order if you have not already done so.

Ronald
Ranch Hand Supply

Soundguy · Jun 1, 2006

Here's an educated guess from a non chinese tractor owner.

Secondary unrelated effect. I.E. the act of repair the kinked line disturbed some other thing.. possibly a loose wire in the wireing harness, and this corrected the oil pressure reading.

I've seen 'similar' issues on other tractors. I was doing a steering repair onmy 8n.. has a dash mounted ammeter.. a plastic cased 'new' one, vs the oem NLS metal cased ones. After putting the dash back on.. no continuite thru ammeter.. remove ammeter.. check with meter -fine-. reinstall.. nothing.

Boiled down to a loose connection in the ammeter.. and when it was firmly mounted tot he dash, which have about a .5 degree bend to it, it put just enough pressure ont he ammeter to break the connection. I actually diagnosed this by leaving the lamps on, and beginning to remove the ammeter.. as soon as i loosened the retainin nuts so that no pressure was on the plastic housing, the meter registerd and lamps came on. It was a 9$ part that took me 4 hours to fix...

I wonder if the act of unkinking this line in some way jiggles something.. like an oil sender.. or dash ground strap.. or soemthing that magically makes the oil gauge work after this?

again.. a really WAG...

Soundguy

Soundguy · Jun 1, 2006

Here's an educated guess from a non chinese tractor owner.

Secondary unrelated effect. I.E. the act of repair the kinked line disturbed some other thing.. possibly a loose wire in the wireing harness, and this corrected the oil pressure reading.

I've seen 'similar' issues on other tractors. I was doing a steering repair onmy 8n.. has a dash mounted ammeter.. a plastic cased 'new' one, vs the oem NLS metal cased ones. After putting the dash back on.. no continuite thru ammeter.. remove ammeter.. check with meter -fine-. reinstall.. nothing.

Boiled down to a loose connection in the ammeter.. and when it was firmly mounted tot he dash, which have about a .5 degree bend to it, it put just enough pressure ont he ammeter to break the connection. I actually diagnosed this by leaving the lamps on, and beginning to remove the ammeter.. as soon as i loosened the retainin nuts so that no pressure was on the plastic housing, the meter registerd and lamps came on. It was a 9$ part that took me 4 hours to fix...

I wonder if the act of unkinking this line in some way jiggles something.. like an oil sender.. or dash ground strap.. or soemthing that magically makes the oil gauge work after this?

again.. a really WAG...

Soundguy

JohnS · Jun 2, 2006

I have seen the posts greg mentions. I couldn't come up with how it would effect oil pressure, either. Only thought was what soundguy mentioned. Anyone with a y385 can go do a test and kink their hose to see if it does effect oil pressure.

Let me throw this out for discussion: If the inlet crankcase filter is totally plugged up, and then the plastic hose became kinked, would that build up enough pressure or vacuum to possibly effect oil pressure? It would seem to me, that it would have to create allot of pressure, but not sure. Thoughts???

JohnS · Jun 2, 2006

I have seen the posts greg mentions. I couldn't come up with how it would effect oil pressure, either. Only thought was what soundguy mentioned. Anyone with a y385 can go do a test and kink their hose to see if it does effect oil pressure.

Let me throw this out for discussion: If the inlet crankcase filter is totally plugged up, and then the plastic hose became kinked, would that build up enough pressure or vacuum to possibly effect oil pressure? It would seem to me, that it would have to create allot of pressure, but not sure. Thoughts???

JohnS · Jun 2, 2006

RonMar,

Theory sounds good and is how I understood positive crankcase ventilation (pcv). Do the newer epa engines have a pcv valve? My non-epa y385, I believe is just a hose attachment to valve cover. Otherwise it will be pulsing all the time. ie, there isn't an intake valve open all the time. You can feel the pulses by holding your hand near/over the inlet to air filter housing. I think it works the same as you described, just not a constant vacuum. My 350 SBC in my boat, does not have pcv valves. Just straight through hoses, up to flame arrester (carb intake/air filter). Gases are drawn off only when air is moving fast enough, only I don't believe there is any crankcase inlet air filter.

I believe this mainly an emissions function. Blowby will have very little unburned fuel, same as what is exiting via exhaust. Never heard of any 70's car motor blowing because it didn't have pcv, and gas vapors are much more combustable than diesel. All they had were foam breathers in valve covers. At least not at stock rpms.

JohnS · Jun 2, 2006

RonMar,

Theory sounds good and is how I understood positive crankcase ventilation (pcv). Do the newer epa engines have a pcv valve? My non-epa y385, I believe is just a hose attachment to valve cover. Otherwise it will be pulsing all the time. ie, there isn't an intake valve open all the time. You can feel the pulses by holding your hand near/over the inlet to air filter housing. I think it works the same as you described, just not a constant vacuum. My 350 SBC in my boat, does not have pcv valves. Just straight through hoses, up to flame arrester (carb intake/air filter). Gases are drawn off only when air is moving fast enough, only I don't believe there is any crankcase inlet air filter.

I believe this mainly an emissions function. Blowby will have very little unburned fuel, same as what is exiting via exhaust. Never heard of any 70's car motor blowing because it didn't have pcv, and gas vapors are much more combustable than diesel. All they had were foam breathers in valve covers. At least not at stock rpms.

Egon · Jun 2, 2006

Think I'd pull the head as chances are [Unfortunetly ] there will be an internal problem. Catch it before it can get worse or do serious damage.

Egon /forums/images/graemlins/grin.gif

Egon · Jun 2, 2006

Think I'd pull the head as chances are [Unfortunetly ] there will be an internal problem. Catch it before it can get worse or do serious damage.

Egon /forums/images/graemlins/grin.gif