High oil temp. Rpm loss. Rough ground run

[carusoam]

How much effort is it to pop a new vernatherm in?

The other thing to check is what the surface of the valve is seeking against...

Is the OilT staying in the green arc?

PP thoughts only...

Best regards,

-a-

[Spuderman1]

6 minutes ago, carusoam said:

How much effort is it to pop a new vernatherm in?

The other thing to check is what the surface of the valve is seeking against...

Is the OilT staying in the green arc?

PP thoughts only...

Best regards,

-a-

It's staying in the green. That's taking into account red line is 245 and it gets into the high 230's. I actually had the oil filter housing removed a few days ago to get the seat re machined. The old vernatherm had a wear mark all around the top so it must habe been seating. I'm thinking since I'm this far into it I may as well spend the couple extra dollars and put that rebuilt vernatherm in. 

I'm curious what on a vernatherm fails. Is it that they get weak or just not extend enough.

[carusoam]

Typical failure they don’t activate at the set temp...

Being mechanical, the spring can fail....

the spring is adjusting the valve opening amount...

The valve opening amount adjusts the amount of fuel flow around, vs into the oil cooler...

When cold, the oil goes around the cooler, and then starts flowing into the cooler as the oil T adjusts the valve...

 

So check the part number of the two vernatherms you have... If it is a different vernatherm, operating differently can be expected...

if it is the same part number and operating differently... that would be a cause for concern...

As for changing plumbing direction... Best to see what the manual says for where the hoses are supposed to go... it sounds right to have air and gravity working together... but see what the manuals show...

PP thoughts only, not a mechanic...

Best regards,

-a-

[Spuderman1]

Time to revive a old post... So it's been a long year of chasing a high oil temp issue. And we'll. The plane now has new baffle seals and just recently got a new aero classic oil cooler. But... temps are better but still too high like 217f in cruise to high. I've had the had the old vernatherm out numerous times and Installed a new one but same temp.

I've now bought a new Donaldson  oil filter housing thinking what if my old housing had been machined and now doesn't seal perfect.

So now with the new housing and new vernatherm I figured I would test the seal. I installed the vernatherm in the housing  (with the aluminium washer/seal) I heated up the water and noticed the vernatherm doesn't seal against the seat of the housing. Now i removed the aluminium washer/seal that goes between the vernatherm and housing to get the vernatherm ckoser to seat. And we'll it worked somewhat. It looked as tho it sealed so I dropped some red die into one of the cavities and it still transferred the color through the vernatherm.

Question is how well does the vernatherm need to seal. And is there a thinner aluminium washer.

Attached is the flight testing my cooler.

https://apps.savvyaviation.com/flights/4095588/be71e73f-37f2-423a-a771-099cb0233fbc

 

Edited July 1, 2020 by Spuderman1

[carusoam]

Let’s see if we can compare somebody else’s OilT data to yours...

This doesn’t look like it is being controlled...

This is when you probably want to join savvy to compare your data to other planes just like yours...

What’s going on with CHT1?
 

Best regards,

-a-

 

[Ragsf15e]

4 hours ago, carusoam said:

Let’s see if we can compare somebody else’s OilT data to yours...

This doesn’t look like it is being controlled...

This is when you probably want to join savvy to compare your data to other planes just like yours...

What’s going on with CHT1?
 

Best regards,

-a-

 

Ha!  I don’t know about your oil temp but my cht 1 looked just like that!  Cold.  Mine runs upper 200s while the other 3 cylinders are 330s.  Had probes swapped, no change.  Heck, even got an overhauled cylinder due to valve wobble and 1 is still cool.  Weird.  Makes me feel better that yours is the same.

Is your oil pressure ok with that temp?  Mine is noticeably less if the temp goes over 200.

[Spuderman1]

6 hours ago, carusoam said:

Let’s see if we can compare somebody else’s OilT data to yours...

This doesn’t look like it is being controlled...

This is when you probably want to join savvy to compare your data to other planes just like yours...

What’s going on with CHT1?
 

Best regards,

-a-

 

Cht 1 is a gasket probe on a original cht probe due to it being a jpi830.

I'm a subscriber of savvy since the day I had my jpi installed. They are definetly an amazing tool! 

[Spuderman1]

1 hour ago, Ragsf15e said:

Ha!  I don’t know about your oil temp but my cht 1 looked just like that!  Cold.  Mine runs upper 200s while the other 3 cylinders are 330s.  Had probes swapped, no change.  Heck, even got an overhauled cylinder due to valve wobble and 1 is still cool.  Weird.  Makes me feel better that yours is the same.

Is your oil pressure ok with that temp?  Mine is noticeably less if the temp goes over 200.

My oil p gets down to mid 60's when temps are that high. Worst part is on landing while I'm rolling out to slow down it drops down to around 20. 

Jeff

[Ragsf15e]

7 hours ago, Spuderman1 said:

My oil p gets down to mid 60's when temps are that high. Worst part is on landing while I'm rolling out to slow down it drops down to around 20. 

Jeff

Ah yes, that’s worrisome.

[ArtVandelay]

My oil p gets down to mid 60's when temps are that high. Worst part is on landing while I'm rolling out to slow down it drops down to around 20. 
Jeff

Try Aeroshell 100 in warm weather.

[Spuderman1]

On 7/2/2020 at 5:48 AM, ArtVandelay said:

Try Aeroshell 100 in warm weather.

I have no objection to trying different oil but my issue is when the plane has run 20w50 as long as I have had it and it's always kept the oil below 200 and all of a sudden my temps get out of control. I don't want to make a band aid fix.

[carusoam]

5 hours ago, Spuderman1 said:

I have no objection to trying different oil but my issue is when the plane has run 20w50 as long as I have had it and it's always kept the oil below 200 and all of a sudden my temps get out of control. I don't want to make a band aid fix.

Have you seen a similar thread lately?

Coyote is hunting down a similar challenge...

You might want to follow his experience, to see if you have anything on common...

Another chance to rule something in or out...

Best regards,

-a-