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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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 Posted: Tue May 12, 2009 10:47 pm Post subject: I was wondering if it was broken.....some news and a tip! |
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Was thinking of sending a test note.
All my bits for the Esqual upgrade left Shelbyville today bound for Blighty!
I posted this on the Jabiru owners site after my trip to Norway in a 3300 engined Jabiru 430:
Some info applicable to the earlier Jabiru heads.
I recently changed a set of gaskets as a few were leaking slightly only to have one blow within 3 flying hours.
Somewhat perplexed whilst investigating I discovered the set screws were bottoming out in the holes even with the new gaskets so not gripping the gaskets fully.
Addition of some plane (sorry plain) washers 1.5mm thick solved the problem.
My suggested long term fix would be to use spring washers instead of the grip washers Jab supply as they are thicker than the thin grip washers..
Mind you I don't think soft iron plan washers will come loose either giving how well the set screws were held in when I started.
The situation is marginal and the single bolts were the worse as the manifold plate is thinner on the side with the single bolt hole than where there are the two side by side.
I think the engine was about # 300, the type with the 3 into one pipe. Talking with a Jab engine guy he's seen it once before on a similar vintage engine.
The most annoying part was I was halfway across Belgium at the time and had to take a day out to get spare gaskets.
I suppose I shouldn't have set off straight after changing the gaskets but we'd been waiting for a while for the right weather and after a permit inspection the leaks were found.
Key pictures of the trip attached with GPS track, you'll note the divert back to Antwerp to return some tools and as a test flight before heading off on a 3.5 hour leg to Denmark.
That never happened due to a front North of Hamburg so after two nights in Liege we had another delay, turned back three times before going into Groningen in Northern Holland.
Last day was a belter, Holland over Germany to Denmark, 35 mins on the ground, past Copenhagen to Gothenburg in Sweden, 45 mins and then up the coast of Sweden over the South of Norway in to Stavanger.
The last leg across Norway was a little 'whiter' that I had expected……I thought it was spring!
<<Norway Trip GPS track.JPG>> <<0a-first leg diverted to Calais poor viz.JPG>> <<0-Coasting in beach at Calais.JPG>> <<1-RAR workshop Antewerp.JPG>> <<2-Front in NW Germany.JPG>> <<3-Shirley enjoying the sunshine.JPG>> <<4-Norwegian terrain after 30 mins.JPG>> <<5-Norwegian terrain after 40 mins.JPG>> <<6-deep coastal Fjord.JPG>> <<7-Stavanger comes into view.JPG>> <<8-Stavanger even closer.JPG>>
Regards, Clive
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, www.ecofont.eu
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
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pequeajim
Joined: 03 Sep 2006
Posts: 708
Location: New Holland, PA
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| Posted: Wed May 13, 2009 3:35 am Post subject: I was wondering if it was broken.....some news and a tip! |
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Thanks for the great pics Clive!
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of James, Clive R
Sent: Wednesday, May 13, 2009 2:44 AM
To: lightning-list(at)matronics.com
Subject: I was wondering if it was broken.....some news and a tip!
Was thinking of sending a test note.
All my bits for the Esqual upgrade left Shelbyville today bound for Blighty!
I posted this on the Jabiru owners site after my trip to Norway in a 3300 engined Jabiru 430:
Some info applicable to the earlier Jabiru heads.
I recently changed a set of gaskets as a few were leaking slightly only to have one blow within 3 flying hours.
Somewhat perplexed whilst investigating I discovered the set screws were bottoming out in the holes even with the new gaskets so not gripping the gaskets fully.
Addition of some plane (sorry plain) washers 1.5mm thick solved the problem.
My suggested long term fix would be to use spring washers instead of the grip washers Jab supply as they are thicker than the thin grip washers..
Mind you I don't think soft iron plan washers will come loose either giving how well the set screws were held in when I started.
The situation is marginal and the single bolts were the worse as the manifold plate is thinner on the side with the single bolt hole than where there are the two side by side.
I think the engine was about # 300, the type with the 3 into one pipe. Talking with a Jab engine guy he's seen it once before on a similar vintage engine.
The most annoying part was I was halfway across Belgium at the time and had to take a day out to get spare gaskets.
I suppose I shouldn't have set off straight after changing the gaskets but we'd been waiting for a while for the right weather and after a permit inspection the leaks were found.
Key pictures of the trip attached with GPS track, you'll note the divert back to Antwerp to return some tools and as a test flight before heading off on a 3.5 hour leg to Denmark.
That never happened due to a front North of Hamburg so after two nights in Liege we had another delay, turned back three times before going into Groningen in Northern Holland.
Last day was a belter, Holland over Germany to Denmark, 35 mins on the ground, past Copenhagen to Gothenburg in Sweden, 45 mins and then up the coast of Sweden over the South of Norway in to Stavanger.
The last leg across Norway was a little 'whiter' that I had expected……I thought it was spring!
<<Norway Trip GPS track.JPG>> <<0a-first leg diverted to Calais poor viz.JPG>> <<0-Coasting in beach at Calais.JPG>> <<1-RAR workshop Antewerp.JPG>> <<2-Front in NW Germany.JPG>> <<3-Shirley enjoying the sunshine.JPG>> <<4-Norwegian terrain after 30 mins.JPG>> <<5-Norwegian terrain after 40 mins.JPG>> <<6-deep coastal Fjord.JPG>> <<7-Stavanger comes into view.JPG>> <<8-Stavanger even closer.JPG>>
Regards, Clive
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, [url=file:///\\www.ecofont.eu]www.ecofont.eu[/url]
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
[quote][b]
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EAFerguson(at)AOL.COM
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| Posted: Wed May 13, 2009 5:34 am Post subject: I was wondering if it was broken.....some news and a tip! |
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In a message dated 5/13/2009 7:36:18 A.M. Eastern Daylight Time, pequeajim(at)gmail.com writes:
| Quote: | I recently changed a set of gaskets as a few were leaking slightly only to have one blow within 3 flying hours.
Somewhat perplexed whilst investigating I discovered the set screws were bottoming out in the holes even with the new gaskets so not gripping the gaskets fully.
Addition of some plane (sorry plain) washers 1.5mm thick solved the problem.
My suggested long term fix would be to use spring washers instead of the grip washers Jab supply as they are thicker than the thin grip washers..
Mind you I don't think soft iron plan washers will come loose either giving how well the set screws were held in when I started.
The situation is marginal and the single bolts were the worse as the manifold plate is thinner on the side with the single bolt hole than where there are the two side by side. |
What gaskets are you having problems with?
Earl Ferguson
Dell Mini Netbooks: Great deals starting at $299 after instant savings!
[quote][b]
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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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| Posted: Wed May 13, 2009 8:25 am Post subject: I was wondering if it was broken.....some news and a tip! |
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Apologies, the title of the posting on the owners website was 'Exhaust
Gaskets', kinda helps with the understanding.....
--
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