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Re: People suckspinning smiley sticking its tongue out
Posted by: joelsplace ()
Date: September 11, 2021 07:11PM

I posted an ad on CL a few days ago. Within 30 minutes I had 4 scammers contact me.
I have at least a dozen calls a week from scammers.

Joel
Northlake, TX
5 Ultravans, 119 Corvairs and counting...

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Re: People suckspinning smiley sticking its tongue out
Posted by: dryenko ()
Date: September 12, 2021 04:52AM

Easier than getting a real job and actually WORKING for a living.

Bob C aka Dryenko
Dobson, NC 27017

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Re: People suckspinning smiley sticking its tongue out
Posted by: KenHenry ()
Date: September 12, 2021 05:43AM

Regarding Bob’s comment about junking the rods and crank, is that commonly done after a rod bearing goes? I ask because I have several loose cranks without history as to why the engine was decommissioned. I also have a set of rods and one appears to have a pounded out bearing in it… Ken

Ken Henry, Rochester, NY USA
1965 Corvair Corsa
140 hp, 4 speed

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Re: People suckspinning smiley sticking its tongue out
Posted by: dryenko ()
Date: September 12, 2021 08:08AM

Inspect the crank for being straight.
If that is OK, have it magnafluxed / crack checked.
In truth, if you can find a nitrided crank, use one of those, given the unkmowns of the ones you have.
Is one of yours nitrided ?? Start with that one.
With the excess of Corvair rods around, I would discard the one with the bad bearing.
It will end up too short if you have it fixed [ in most cases ]
JMO.

Bob C aka Dryenko
Dobson, NC 27017

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Re: People suckspinning smiley sticking its tongue out
Posted by: KenHenry ()
Date: September 12, 2021 01:27PM

I do have a nitrided one; will have that one checked out first.

Ken Henry, Rochester, NY USA
1965 Corvair Corsa
140 hp, 4 speed

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Re: People suckspinning smiley sticking its tongue out
Posted by: Frank DuVal ()
Date: September 12, 2021 07:13PM

Quote
Bob
I would discard the one with the bad bearing.
It will end up too short if you have it fixed [ in most cases ]

Funny in all the engines I have rebuilt over 50 years, Corvair and many others, no machine shop has ever mentioned this. I guess because I do not build race engines!grinning smiley

I do see how it does shorten it by a thousandths or two when you get them round again (grind a little off the cap mating surface, re-bolt cap on, then make hole round).

Frank DuVal

Fredericksburg, VA

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Re: People suckspinning smiley sticking its tongue out
Posted by: Wurth1 ()
Date: September 15, 2021 09:29AM

Looking like somebody at some point did suck....

"hey gizmo.... da oil pressure light in dat Vair is flickering... gee Gnarly...is it rapping yet??.... no Gizmo, it's still pretty quiet.... and it runs and idles great!!... aaahhh... shim up da bypass and see if you can make da light go out..... good call Gnarly!!... She'll sell now!

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Re: People suckspinning smiley sticking its tongue out
Posted by: azdave ()
Date: September 15, 2021 10:51AM

Wurth1 Wrote:
-------------------------------------------------------
> Looking like somebody at some point did suck....
>
> "hey gizmo.... da oil pressure light in dat Vair is flickering...


I'm sure they didn't know that shimming the oil pressure relief valve spring only increases the max pressure at which the relief valve opens. It does nothing to increase the oil pressure on the low end.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: People suckspinning smiley sticking its tongue out
Posted by: Wurth1 ()
Date: September 15, 2021 11:44AM

Will it affect the switch/light?

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Re: People suckspinning smiley sticking its tongue out
Posted by: azdave ()
Date: September 15, 2021 02:31PM

Wurth1 Wrote:
-------------------------------------------------------
> Will it affect the switch/light?

Nope. The oil pressure switch closes and turns on the idiot light when it sees less than roughly 4 PSI. When your oil pressure is below 35 PSI that bypass valve is completely shut and no amount of extra spring length or shimming will ever raise the minimum oil pressure. That valve and spring can only affect the high pressure setting.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: People suckspinning smiley sticking its tongue out
Posted by: Wurth1 ()
Date: September 15, 2021 02:42PM

Very interesting.....now I really don't see the point of shimming the spring.
You really never know what you'll find and of course never know why it's in there. Once I got deep in it was clearly poorly maintained in it's later years at least. Once again I appreciate the info.

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Re: People suckspinning smiley sticking its tongue out
Posted by: azdave ()
Date: September 15, 2021 03:21PM

Wurth1 Wrote:
-------------------------------------------------------
> Very interesting.....

I nerd-out on stuff sometimes. I built a special tool that installs temporarily in place of the threaded plug that covers the oil pressure relief valve. While running that device on my test stand engine, I am able to watch the position of that bypass valve as it moves and note when and how much it opens under different operating conditions like cold starts, hot starts, with hot oil at low RPM, etc.

Dave W. / Gilbert Arizona
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4 A/C
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5



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Re: People suckspinning smiley sticking its tongue out
Posted by: Wurth1 ()
Date: September 15, 2021 03:48PM

Very cool, I love learning/seeing how things work and fail it's been my obsession since I was a kid sneaking through scrap yards etc

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Re: People suckspinning smiley sticking its tongue out
Posted by: 66vairman ()
Date: September 15, 2021 04:24PM

Wurth1 Wrote:
-------------------------------------------------------
> Very interesting.....now I really don't see the point of shimming the spring.
> You really never know what you'll find and of course never know why it's in there. Once I got deep in it was clearly poorly maintained in it's later years at least. Once again I appreciate the info.

Years ago I had a box of oil pump pressure regulator springs form old engines I'd dismantled. I had read numerous times on forums to "stretch" the spring when you rebuild the engine. Implying the springs lost tension with age.

For fun I built a tension test stand and used the height the spring would be at when the piston opened to by-pass oil and prevent excess oil pressure. NOT ONE SPRING WAS OUT OF SPECIFICATION!!! So I don't shim, stretch, or modify the spring. It is obviously a quality part that holds it's specified tension --- unless someone modifies it.

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Re: People suckspinning smiley sticking its tongue out
Posted by: joelsplace ()
Date: September 15, 2021 09:28PM

I had a '63 102 that the oil pressure light started coming on at idle. I put a bearing on the spring and it fixed it. I would agree that a stiffer spring should only change the max pressure but if you have a sacked spring it could allow the plunger to unseat and hurt idle pressure and then some RPM overcomes the leak and turns off the light.

Joel
Northlake, TX
5 Ultravans, 119 Corvairs and counting...

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