Not that I would disagree, but...aren't these the same "VDO" senders that have been used for maybe 50 years in cars, always directly attached to the engine? A lot of those were 4-cylinder engines that have a pretty high vibration level. I've seen a lot of them fail from leakage or intermittent resistor contacts, but none from falling off the engine. So would attaching them directly to the engine via a steel restrictor fitting really be worse than using a flexible hose, with its potential leakage
potential? I'm not sure.
Gary, having made my own restrictor fittings.
Robert,
If there is a "correct" way to install the oil pressure sender, you're supposed to use a restrictor fitting on the engine, a firesleeved hose to a firewall mounted sensor. Oil pressure senders can leak, so using a restrictor fitting is key. Better to have a drip instead of a huge leak. Mounting the sender away from engine vibration will significantly increase its lifespan.
I have a JPI EDM 900 engine monitor and the instructions
specifically say "DO NOT MOUNT SENSOR DIRECTLY TO ENGINE" but there's no mention of a restrictor fitting. They specify an Adel clamp around the sensor attached to the firewall.
Vans sells a 45 degree steel elbow restrictor fitting for about $20. Wicks has an inline brass restrictor fitting for about $6. I think a restrictor fitting is a good idea on the fuel pressure sender hose fitting too.
Mike
In a message dated 12/16/09 08:04:56 Mountain Standard Time, lancair-esp@ustek.com writes:
From: mikeeasley [mailto:mikeeasley@aol.com]
Sent: Tuesday, December 15, 2009 8:41 AM
To: lml@lancaironline.net
Subject: Re: [LML] Re: Legacy Crash Watsonville?
I can't think on anything worse than an engine fire and it's important to discuss what to do when you have to deal with an in-flight fire.