Jabiru 2200 Oil Pre...
 
Notifications
Clear all

Jabiru 2200 Oil Pressure Fluctuation

8 Posts
5 Users
0 Reactions
1,507 Views
Jabiruyank
(@jabiruyank)
Estimable Member
Joined: 4 years ago
Posts: 64
Topic starter  

Greetings,

I have experienced a sudden onset of oil pressure fluctuation. Normally, I would read a steady 4.8 kpa in cruise @2900 rpm. In today’s flight, I saw rapid fluctuations in oil pressure during cruise. It would drop to 3kpa in about 1-1/2 seconds. If I lowered the rpm it resumed back quickly to 4.8. Resuming hold @ 4.8 kpi, but it occurred again. I checked the oil level and it was at the minimum line of the dip stick. After adding oil, I saw fluctuations after climb out when I throttled to cruise configuration of 2900 RPM with CHT’s at 250 F and EGT in the 1250’s F. It also fluctuated when I encountered turbulence, it was small movements as compared to the aforementioned. It eventually maintained a steady 4.8 kpa for the rest of the 15 min flight. Any recommendations on what I should look at; oil pump, electrical, possible metal fines causing blockage, pressure relief valve, etc? 

2200 serial number 22A981. 

Thanks! 

Alex R. 


   
Quote
(@jabiru-support)
Member Admin
Joined: 4 years ago
Posts: 199
 

Hello Alex,

The best way to check is to use a mechanical guage in the engine to confirm the pressure issue.  That seems a bit hard as the pressure drop sounds intermittent.  So I would change the oil pressure sender first.   It is not unheard of for them to fail after some time in service. 

 


   
ReplyQuote
(@jhmcglynn)
Active Member
Joined: 5 years ago
Posts: 7
 

I had a similar problem.  New oil pressure sender fixed the problem on my GEN 2 3300.  Nick at Arion Aircraft sells a kit to mount the VDO sender on the firewall which is reported to mitigate the problem.

BTW - mine was spiking up from about 50 pounds to 75-80 pounds.

This post was modified 2 years ago by jhmcglynn

John McGlynn


   
ReplyQuote
(@shawnk)
Active Member
Joined: 2 years ago
Posts: 11
 

Posted by: @jhmcglynn

I had a similar problem.  New oil pressure sender fixed the problem on my GEN 2 3300.  Nick at Arion Aircraft sells a kit to mount the VDO sender on the firewall which is reported to mitigate the problem.

BTW - mine was spiking up from about 50 pounds to 75-80 pounds.

It wasn't the new pressure sender that fixed the problem, it was the new sender that showed that the problem was in the sender 🙂

 


   
ReplyQuote
(@olpo)
Eminent Member
Joined: 6 years ago
Posts: 26
 

Hi. I have noticed something similar over the last few months. Jabiru 2200 year 2008. Oil pressure is generally around 3,7-3,8 bar when in cruise at 85 deg C, but when reducing throttle from cruise setting, I see the pressure jump up for a second or two to 4,1-4,2 bar, and then drop to what I consider normal pressure again. At idle rpm I have approx. 1,5-1,7 bar.

I have got a MGL EFIS where the oil pressure is indicated. I guess the screen might have some delay, so what the pressure spike might be I don't know. But if it is the sender being faulty, I believe my oil pressure is fine. I just need a new sender.


   
ReplyQuote
(@olpo)
Eminent Member
Joined: 6 years ago
Posts: 26
 

Continue to see these eratic pressure spikes, so I have decided to replace the sender. I remove the old VDO sender to verify the model and find there is a small fiber gasket between the sender and the engine. The gasket is brittle and now broken to pieces. Does a new VDO sender come with a new seal? If not - what will fit?


   
ReplyQuote
(@jabiru-support)
Member Admin
Joined: 4 years ago
Posts: 199
 

@olpo That doesn't sound like a standard jabiru oil pressure sensor.  The jabiru oil pressure sensor uses a 1/8 NPT taper thread.


   
ReplyQuote
(@shawnk)
Active Member
Joined: 2 years ago
Posts: 11
 

Posted by: @olpo

Hi. I have noticed something similar over the last few months. Jabiru 2200 year 2008. Oil pressure is generally around 3,7-3,8 bar when in cruise at 85 deg C, but when reducing throttle from cruise setting, I see the pressure jump up for a second or two to 4,1-4,2 bar, and then drop to what I consider normal pressure again. At idle rpm I have approx. 1,5-1,7 bar.

I have got a MGL EFIS where the oil pressure is indicated. I guess the screen might have some delay, so what the pressure spike might be I don't know. But if it is the sender being faulty, I believe my oil pressure is fine. I just need a new sender.

I have pressure jumps too, and I don't see it as a problem. If the pressure does not drop, it would be a problem.

 


   
ReplyQuote
Share: