Strange oil leak

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jcannon44
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Joined: Tue Aug 01, 2017 10:43 am

Strange oil leak

Unread post by jcannon44 » Tue Dec 05, 2017 7:05 pm

I have developed a small leak on the lip of the top shroud between the distributor and the pulley. It doesn’t seem to be coming from the oil pressure switch or the fuel pump. I’m at a loss to figure this one out. All fitting to the fuel pump are dry. The tightning nut for the tension pulley is wet, how could oil or gas be coming from there? Any ideas or suggestions would be appreciated.
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Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Last edited by jcannon44 on Tue Dec 05, 2017 7:05 pm, edited 1 time in total.
Jeff Cannon, Smithfield VA
1966 Corvair Monza Convertible

Jerry Whitt
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Re: Strange oil leak

Unread post by Jerry Whitt » Tue Dec 05, 2017 7:17 pm

Under the shroud are some possibilities. There is a bearing in the top cover, holding the fan. Around the top cover about a dozen bolts that hold the cover to the top of the block assembly. If there were a leak around the gasket between the top cover and the block, the air pressure from the fan could cause the oil leak noted.
Jerry Whitt
ASE CERTIFIED MASTER TECHNICIAN
Retired
Hemet, Callifornia
65 Monza, purchased new
65 Corsa convertible

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jcannon44
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Re: Strange oil leak

Unread post by jcannon44 » Tue Dec 05, 2017 7:41 pm

Jerry Whitt wrote:Under the shroud are some possibilities. There is a bearing in the top cover, holding the fan. Around the top cover about a dozen bolts that hold the cover to the top of the block assembly. If there were a leak around the gasket between the top cover and the block, the air pressure from the fan could cause the oil leak noted.
Wouldn’t that cause a leak under car as well? I’m totally dry under car.


Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Jeff Cannon, Smithfield VA
1966 Corvair Monza Convertible

Jerry Whitt
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Re: Strange oil leak

Unread post by Jerry Whitt » Tue Dec 05, 2017 7:44 pm

Not if gasket is only seeping.
Jerry Whitt
ASE CERTIFIED MASTER TECHNICIAN
Retired
Hemet, Callifornia
65 Monza, purchased new
65 Corsa convertible

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terribleted
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Re: Strange oil leak

Unread post by terribleted » Tue Dec 05, 2017 8:33 pm

most likely engine top cover or oil filter adapter leak.
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
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Located in Snellville, Georgia

64powerglide
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Re: Strange oil leak

Unread post by 64powerglide » Tue Dec 05, 2017 9:43 pm

Check the oil pressure sending unit too. Also the distributor O-Ring might be leaking. I'm having a heater oil smoke smell myself & thought it was the PCV tube coming out of the side of the crankcase cover but when I pulled the fan shroud all the cover bolts were loose & it's leaking enough oil to get 4 cylinders wet. I ordered a new PCV tube O-Ring but the old one is dry. Hope I can get the oil cleaned off the cylinders. It was 60 degrees Monday but dropped to the low 30's today with snow coming Wednesday, might have to fire up the kerosene heater to finish the job.
64Powerglide, Jeff Phillips

Kalamazoo, Mi..

Jerry Whitt
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Re: Strange oil leak

Unread post by Jerry Whitt » Tue Dec 05, 2017 10:23 pm

My parts books and tech manuals do not show a distributor O ring.
Jerry Whitt
ASE CERTIFIED MASTER TECHNICIAN
Retired
Hemet, Callifornia
65 Monza, purchased new
65 Corsa convertible

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terribleted
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Re: Strange oil leak

Unread post by terribleted » Tue Dec 05, 2017 10:50 pm

Jerry Whitt wrote:
Tue Dec 05, 2017 10:23 pm
My parts books and tech manuals do not show a distributor O ring.
Correct, the distributor uses a gasket not an o-ring. That leak would be a little low to get on the engine number area anyway (unless blowing there).
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
https://www.facebook.com/tedsautorestoration/

Located in Snellville, Georgia

gnrand
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Location: Wildomar,Ca

Re: Strange oil leak

Unread post by gnrand » Wed Dec 06, 2017 7:02 am

Auto supply stores sell a dye that can be added to the oil and with a UV light you can trace an oil leak. They sell the whole kit (dye, light, tinted glasses) for under $20.
Jeff
1965 140 Corsa
1968 140 Monza convertible 4 speed
1965 Corsa Convertible
1966 Crown V8
1986 Buick GN V6 600hp

64powerglide
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Re: Strange oil leak

Unread post by 64powerglide » Wed Dec 06, 2017 9:11 am

Well crap, I meant to say the fuel pump O-Ring not the dist.!!! :banghead:
64Powerglide, Jeff Phillips

Kalamazoo, Mi..

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jcannon44
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Re: Strange oil leak

Unread post by jcannon44 » Wed Dec 06, 2017 12:12 pm

Great suggestion, looks like adapter gasket at this point.


Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Jeff Cannon, Smithfield VA
1966 Corvair Monza Convertible

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jcannon44
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Strange oil leak

Unread post by jcannon44 » Wed Dec 06, 2017 3:09 pm

jcannon44 wrote:Great suggestion, looks like adapter gasket at this point.


Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
I have removed the oil filter adapter and top shroud. Looks like it was the adapter seal that was leaking! Anything else you think i should do while i have the top off?

Image

Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Jeff Cannon, Smithfield VA
1966 Corvair Monza Convertible

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jcannon44
Posts: 18
Joined: Tue Aug 01, 2017 10:43 am

Re: Strange oil leak

Unread post by jcannon44 » Thu Dec 07, 2017 8:11 am

jcannon44 wrote:
jcannon44 wrote:Great suggestion, looks like adapter gasket at this point.


Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
I have removed the oil filter adapter and top shroud. Looks like it was the adapter seal that was leaking! Anything else you think i should do while i have the top off?

Image

Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Found a small crack in the fan housing, is this serious? Please let me know what you think! See attached photo.
Image


Jeff Cannon, Smithfield, VA
1966 Corvair Monza Conv.
Jeff Cannon, Smithfield VA
1966 Corvair Monza Convertible

PaulR
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Location: Appleton, WI

Re: Strange oil leak

Unread post by PaulR » Thu Dec 07, 2017 7:49 pm

Strange no one has mentioned this, but to me the rubber hose going into the fuel pump from the main fuel line is a bit unsettling. Please replace it with the continuous all steel original type line. If the fan belt goes off the pulleys or breaks at a high speed, it could rupture that rubber line, sending fuel all over a hot engine.
1964 Monza convertible 110/PG

64powerglide
Posts: 1249
Joined: Tue Mar 25, 2014 9:18 pm
Location: Kalamazoo Mi..

Re: Strange oil leak

Unread post by 64powerglide » Thu Dec 07, 2017 7:58 pm

I saw it but figured being the inlet line the fuel pump couldn't pump anymore fuel so gasoline spill would be minimal but still a fire hazard.
64Powerglide, Jeff Phillips

Kalamazoo, Mi..

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