<VV> Which OIL? Re: Doc opinion

[Bob]

Hi Timothy,
That was also part of the problem.
I had separate head gauges and an oil temperature gauge and I monitor them continuously while driving, especially when the coach is fully loaded.
However, I had put the oil temperature gauge sender in the bottom of the Otto oil pan. Several people has since told me that was about the worst possible place as the oil is probably at its coolest there.
My recollection was that the gauge was hovering just under 250F beyond which oil starts to fail. My head temps were OK so I kept on going. With hindsight I now know that the oil was 250F in the coolest area of the engine so my guess is that it could have been 300F or so in hotter areas. At 300F dyno oil has only 6% of its lubricating ability and that was all she wrote for that engine!
The crank and cam survived but I needed new cylinders and pistons. Live and learn.
Regards,
Bob


-----Original Message-----
From: shortle [mailto:shortle556 at earthlink.net] 
Sent: May 16, 2015 7:22 PM
To: frankcb at aol.com; bgilbert at gilberts-bc.ca; corvairjack at yahoo.com; virtualvairs at corvair.org
Subject: Re: <VV> Which OIL? Re: Doc opinion

Bob, are you using an oil temp. gauge and monitoring it? I am wondering where the oil temp was at when the damge occured. Timothy Shortle in Durango Colorado 81301


-----Original Message-----
>From: frankcb--- via VirtualVairs <virtualvairs at corvair.org>
>Sent: May 16, 2015 6:45 PM
>To: bgilbert at gilberts-bc.ca, corvairjack at yahoo.com, 
>virtualvairs at corvair.org
>Subject: <VV> Which OIL?  Re:  Doc opinion
>
>Bob, were you using a SYNTHETIC engine oil at the time the damage occurred?  Usually they're good up to 450 deg.F. which is quite a bit higher than conventional oils.
>     Frank Burkhard
>     Boonton, NJ
>
>-----Original Message-----
>From: Bob via VirtualVairs <virtualvairs at corvair.org>
>To: 'JackPinard' <corvairjack at yahoo.com>; virtualvairs 
><virtualvairs at corvair.org>
>Sent: Sat, May 16, 2015 8:34 pm
>Subject: Re: <VV> Doc opinion
>
>
>Hi,
>And on a somewhat related note, I seriously damaged a freshly built 3.1 
>in my UltraVan about 18 months ago. I did all the required deflashing, 
>etc.
>but
>made a huge mistake in not installing additional cooling power in the 
>form of an external oil cooler. No problem for short trips around home 
>but on the first long trip, up a multi-mile very steep hill in the 
>Rockies with a full load of vacation supplies I cooked the oil and 
>damaged all 6 pistons and cylinders beyond repair. An expensive lesson 
>and with 20:20 hindsight totally preventable.
>So cooling is VERY important when you stress Corvair engines beyond 
>their normal "in-car" mode.
>Regards,
>Bob
>PS I am
>rebuilding it as we speak and adding a fan driven external oil cooler!
>
>-----Original Message-----
>From: VirtualVairs
>[mailto:virtualvairs-bounces at corvair.org] On Behalf Of JackPinard via 
>VirtualVairs
>Sent: May 16, 2015 10:35 AM
>To:
>virtualvairs at corvair.org
>Subject: <VV> Doc opinion
>
>Appreciate Doc's detailed
>dissertation on FC engines and driving.
>Agree they need to be handled
>differently than cars.
>Have experienced engine failures on Ramp and Brier bought from 
>long-time owners that were tuned by "professional" Vair mechanics but 
>lacked suggested modifications.
>Many of us are not gear heads and depend on others for service and 
>repairs.
>We need to know the realities of our lovely old trucks.
>Jack by the Big Beach
>'64 Greenbrier Deluxe
>'66 Corsa soft
>top
>plus several waiters
>   
>  
>
>
>_______________________________________________
>This message was sent by the
>VirtualVairs mailing list, all copyrights are the property of the 
>writer, please attribute properly. For help, mailto:vv-help at corvair.org 
>This list sponsored by the Corvair Society of America, 
>http://www.corvair.org/ Post messages to: VirtualVairs at corvair.org 
>Change your options:
>http://www.vv.corvair.org/mailman/options/virtualvairs
>
>_______________________________________________
>
>
>_______________________________________________
>This message was sent by the
>VirtualVairs mailing list, all copyrights are the property of the 
>writer, please attribute properly. For help, mailto:vv-help at corvair.org 
>This list sponsored by the Corvair Society of America, 
>http://www.corvair.org/ Post messages to: VirtualVairs at corvair.org 
>Change your options:
>http://www.vv.corvair.org/mailman/options/virtualvairs
>
>_______________________________________________
>
> 
> _______________________________________________
>This message was sent by the VirtualVairs mailing list, all copyrights 
>are the property of the writer, please attribute properly. For help, 
>mailto:vv-help at corvair.org This list sponsored by the Corvair Society 
>of America, http://www.corvair.org/ Post messages to: 
>VirtualVairs at corvair.org Change your options: 
>http://www.vv.corvair.org/mailman/options/virtualvairs
> _______________________________________________