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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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 Posted: Thu Sep 22, 2011 10:06 am Post subject: oil pressure and hydraulic tappets |
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Hi Nick, funnily enough I just got told that by a jab engineer in the UK about 5 hours ago. Would be great news but my oil pressure was low, in fact worryingly low.
When throttling back with a warm engine dropped to 15 psi, on a couple of occasions to nothing.
I had resisted the temptation to add any washers as I had convinced myself the relief valve wasn’t lifting, on a static test I got 5 bar before the valve lifted.
The pressure must be somewhere in the mix though as it been an issue on both sides of the pond I have learned today!
I understand that hydraulic engines lifters were first high leak and then low leak and are now back to high leak.
Don’t know where my # 1460 fits bit I do know that after 37 hours 3 out of six had leakdown numbers below 16/80. You could see the valves hadn’t been hitting the seats.
Sounds like I need ‘high leak’ but have I got the oil?
To cap that all valve guides are oversized. Having them changed at the moment but when I’ve got my compression back I need to figure the next step as it won’t last only if the valves don’t close.
I plan to stop the pressure pulsing so I can see what the effective pressure is and then figure it from there….bring back solid lifters, I never thought the old tappets was a big issue.
Thanks, Regards, Clive
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Nick Otterback
Sent: 22 September 2011 18:09
To: lightning-list(at)matronics.com
Subject: Re: Lightning-List: Troll
Clive,
What are u getting for oil pressure in cruise, some of the early hyd engine will get the valves held open by high oil pressure
Nick
Sent from my iPhone
On Sep 22, 2011, at 12:51 PM, "James, Clive R" <clive.james(at)uk.bp.com> wrote:
Pete was always dead against Yahoo as it used to Spamalot, though I never got any, I did notice he’s been posting on it of late.
Matronics you get spam from the guy who keeps telling you the rules but you can send attachments, you can’t (as yet) do that on Yahoo.
Regards, Clive
Esqual Grounded due to hyd lifter engine woes…valves not closing and so no compression, anyone seen that in their lightning or Esqual?
Problem seems to be lifters are a bit too keen on taking up the slack…
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Bernard Melendez, Jr.
Sent: 22 September 2011 16:54
To: lightning-list(at)matronics.com
Subject: Re: Lightning-List: Troll
I agree with you, Earl. Please, someone more techie than I am, start a Yahoo group. Someone that can monitor the list.
Bernardo
--- On Thu, 9/22/11, EAFerguson(at)AOL.COM <EAFerguson(at)AOL.COM> wrote:
From: EAFerguson(at)AOL.COM <EAFerguson(at)AOL.COM>
Subject: Lightning-List: Troll
To: lightning-list(at)matronics.com
Date: Thursday, September 22, 2011, 10:06 AM
In a message dated 9/21/2011 2:59:39 A.M. Eastern Daylight Time, lightning-list(at)matronics.com writes:
Time: 09:37:49 PM PST US
Subject: Re: Lightning-List: Troll
From: mark(at)flylightning.net
Sorry Earl,
This list doesn't censor like other lists (such as the failed attempt of
the poster to start a Yahoo based group). He has the right to spew as much
bullshit as he wants. It's the right that you and I served the majority of
our lives for to maintain whether we agree or not. It's our duty to filter
through the diatribe based on our own knowledge and experience and respond
from there.
Best regards,
Mark
If Matronics can't or won't police their lists, we need to go elsewhere.
The Constitution guarantees freedom of speech, but not the transmission thereof.
Earl
http://www.matronics.com/Navigator?Lightning-List">http://www.matro"nofollow" target="_blank" href="http://forums.matronics.com">http://fo==========
http://www.matronics.com/Navigator?Lightning-List
http://forums.matronics.com
http://www.matronics.com/contribution
===================================
>http://www.matronics.com/Navigator?Lightning-List
===================================
ums.matronics.com">http://forums.matronics.com
===================================
http://www.matronics.com/contribution">http://www.matronics.com/contribution <http://www.matronics.com/contribution%22%3ehttp:/www.matronics.com/contribution>
===================================
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wampam
Joined: 20 Oct 2008
Posts: 49
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| Posted: Thu Sep 22, 2011 10:23 am Post subject: oil pressure and hydraulic tappets |
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I had my oil pressure drop to zero a couple of times. It turns out the crimp connector on the pressure sensor was poorly crimped and loose.
Walt Mefford
GARMIN AT
Team Lead, Manufacturing Test Engineering
(503) 391-3343
walt.mefford(at)garmin.com (walt.mefford(at)garmin.com)
[img]cid:image001.jpg(at)01CC7919.71DA7FB0[/img]
N881WP
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of James, Clive R
Sent: Thursday, September 22, 2011 11:03 AM
To: lightning-list(at)matronics.com
Subject: RE: Lightning-List: oil pressure and hydraulic tappets
Hi Nick, funnily enough I just got told that by a jab engineer in the UK about 5 hours ago. Would be great news but my oil pressure was low, in fact worryingly low.
When throttling back with a warm engine dropped to 15 psi, on a couple of occasions to nothing.
I had resisted the temptation to add any washers as I had convinced myself the relief valve wasn’t lifting, on a static test I got 5 bar before the valve lifted.
The pressure must be somewhere in the mix though as it been an issue on both sides of the pond I have learned today!
I understand that hydraulic engines lifters were first high leak and then low leak and are now back to high leak.
Don’t know where my # 1460 fits bit I do know that after 37 hours 3 out of six had leakdown numbers below 16/80. You could see the valves hadn’t been hitting the seats.
Sounds like I need ‘high leak’ but have I got the oil?
To cap that all valve guides are oversized. Having them changed at the moment but when I’ve got my compression back I need to figure the next step as it won’t last only if the valves don’t close.
I plan to stop the pressure pulsing so I can see what the effective pressure is and then figure it from there….bring back solid lifters, I never thought the old tappets was a big issue.
Thanks, Regards, Clive
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Nick Otterback
Sent: 22 September 2011 18:09
To: lightning-list(at)matronics.com
Subject: Re: Lightning-List: Troll
Clive,
What are u getting for oil pressure in cruise, some of the early hyd engine will get the valves held open by high oil pressure
Nick
Sent from my iPhone
On Sep 22, 2011, at 12:51 PM, "James, Clive R" <clive.james(at)uk.bp.com (clive.james(at)uk.bp.com)> wrote:
| Quote: |
Pete was always dead against Yahoo as it used to Spamalot, though I never got any, I did notice he’s been posting on it of late.
Matronics you get spam from the guy who keeps telling you the rules but you can send attachments, you can’t (as yet) do that on Yahoo.
Regards, Clive
Esqual Grounded due to hyd lifter engine woes…valves not closing and so no compression, anyone seen that in their lightning or Esqual?
Problem seems to be lifters are a bit too keen on taking up the slack…
From: owner-lightning-list-server(at)matronics.com (owner-lightning-list-server(at)matronics.com) [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Bernard Melendez, Jr.
Sent: 22 September 2011 16:54
To: lightning-list(at)matronics.com (lightning-list(at)matronics.com)
Subject: Re: Lightning-List: Troll
I agree with you, Earl. Please, someone more techie than I am, start a Yahoo group. Someone that can monitor the list.
Bernardo
--- On Thu, 9/22/11, EAFerguson(at)AOL.COM (EAFerguson(at)AOL.COM) <EAFerguson(at)AOL.COM (EAFerguson(at)AOL.COM)> wrote:
From: EAFerguson(at)AOL.COM (EAFerguson(at)AOL.COM) <EAFerguson(at)AOL.COM (EAFerguson(at)AOL.COM)>
Subject: Lightning-List: Troll
To: lightning-list(at)matronics.com (lightning-list(at)matronics.com)
Date: Thursday, September 22, 2011, 10:06 AM
In a message dated 9/21/2011 2:59:39 A.M. Eastern Daylight Time, lightning-list(at)matronics.com (lightning-list(at)matronics.com) writes:
| Quote: |
Time: 09:37:49 PM PST US
Subject: Re: Lightning-List: Troll
From: mark(at)flylightning.net (mark(at)flylightning.net)
Sorry Earl,
This list doesn't censor like other lists (such as the failed attempt of
the poster to start a Yahoo based group). He has the right to spew as much
bullshit as he wants. It's the right that you and I served the majority of
our lives for to maintain whether we agree or not. It's our duty to filter
through the diatribe based on our own knowledge and experience and respond
from there.
Best regards,
Mark |
If Matronics can't or won't police their lists, we need to go elsewhere.
The Constitution guarantees freedom of speech, but not the transmission thereof.
Earl
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