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Oil pressure increases with altitude - Update

 
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wdaniell.longport(at)gmai
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PostPosted: Sat Sep 18, 2021 4:45 pm    Post subject: Oil pressure increases with altitude - Update Reply with quote

A wise man once told me that while piston engines might not be as reliable as turbines, the good thing is that they warn you when something is wrong before it goes badly wrong.
The photo is of the turbo oil pressure feed line.  This time it wasn't me - it was my mechanic who is normally meticulous.  The line was routed so that it touched the exhaust.  While there was no oil leak there must have been some kind of effect.
[img]cid:ii_ktqhwrp21[/img]

So the line now replaced, oil and filter changed etc and the oil pressure is steady from sea level through to 5000.
Bud was right - it did have something to do with the turbo
William Daniell

LONGPORT

+1 786 878 0246


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rparigoris



Joined: 24 Nov 2009
Posts: 681

PostPosted: Sat Sep 18, 2021 5:17 pm    Post subject: Re: Oil pressure increases with altitude - Update Reply with quote

Hi William
Glad you found your problem. If not too much trouble, perhaps make a few cuts in both oil lines and see if there is a coking build up inside and post pics if so. Thx. Ron P.


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wdaniell.longport(at)gmai
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PostPosted: Sun Sep 19, 2021 4:27 am    Post subject: Oil pressure increases with altitude - Update Reply with quote

Good thought.   

The lining of the hose is completely intact with no visible damage.  There was no oil residue on the inside of the fire sleeve

However change in pressure with altitude suggests that the hose was compromised.
The consequences of not correcting this might have been total and rapid loss of oil. 

William Daniell
+1 786 878 0246
On Sat, Sep 18, 2021, 21:20 rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:

Quote:
--> Europa-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>

Hi William
Glad you found your problem. If not too much trouble, perhaps make a few cuts in both oil lines and see if there is a coking build up inside and post pics if so. Thx. Ron P.




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Duncan McFadyean



Joined: 18 Jan 2011
Posts: 174

PostPosted: Sun Sep 19, 2021 8:30 am    Post subject: Oil pressure increases with altitude - Update Reply with quote

And an oil fire!
Quote:
On 19 September 2021 at 13:27 William Daniell <wdaniell.longport(at)gmail.com> wrote:

Good thought.

The lining of the hose is completely intact with no visible damage. There was no oil residue on the inside of the fire sleeve

However change in pressure with altitude suggests that the hose was compromised.


The consequences of not correcting this might have been total and rapid loss of oil.

William Daniell
+1 786 878 0246


On Sat, Sep 18, 2021, 21:20 rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:

Quote:
--> Europa-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>

Hi William
Glad you found your problem. If not too much trouble, perhaps make a few cuts in both oil lines and see if there is a coking build up inside and post pics if so. Thx. Ron P.




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=503213#503213






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rparigoris



Joined: 24 Nov 2009
Posts: 681

PostPosted: Sun Sep 19, 2021 10:52 am    Post subject: Re: Oil pressure increases with altitude - Update Reply with quote

Hi William
I was suggesting taking a razor blade or knife and slicing apart both your hoses and inspecting the inside of the hoses looking for hard restricting buildup. Ron P.


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wdaniell.longport(at)gmai
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PostPosted: Sun Sep 19, 2021 4:54 pm    Post subject: Oil pressure increases with altitude - Update Reply with quote

Nope the inside of the hose is completely clean and unobstructed.

William Daniell
+1 786 878 0246
On Sun, Sep 19, 2021, 14:16 rparigoris <rparigor(at)hotmail.com (rparigor(at)hotmail.com)> wrote:

Quote:
--> Europa-List message posted by: "rparigoris" <rparigor(at)hotmail.com (rparigor(at)hotmail.com)>

Hi William
I was suggesting taking a razor blade or knife and slicing apart both your hoses and inspecting the inside of the hoses looking for hard restricting buildup. Ron P.




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=503226#503226






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