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Returning to my Corvair
Posted by: geomuck ()
Date: July 19, 2018 05:47PM

Hi Corvair friends!

Last September (2017), my Corvair suffered some kind of major engine issue on my way home. While it was still running, kind of, it was knocking terribly and vomiting out black smoke from the right tailpipe. I shut it down immediately and got a tow home.

Since then, I've had some life and family issues, as is generally the case with us humans smiling smiley

But I'm now back to being able to give my car some attention. So starting this weekend, I'll be again putting time (and money, presumably) into my Corvair. "Catastrophic" engine issues are well outside of my comfort zone, however, so expect many future posts from me, asking questions and looking for general direction. I'll certainly be engaging my local club as well, and taking advantage of any and all assistance that they're willing to provide.

I'm thinking that my own personal "step one" is going to be:
a) change the oil, because it's been sitting for about a year
b) try to start it, and get a real feel for what's going on

I'll probably video step b), and at that point I'll also probably be asking (begging?) for help in next steps and troubleshooting.

I appreciate this forum and the local club very much. It's... intimidating to dive in with very little knowledge of what to do and how to do it. But I'm nothing if not humble, and willing to learn. I'm going to thank you all in advance for the help and encouragement you'll no doubt provide me in my endeavor!

Best,

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: MattNall ()
Date: July 19, 2018 05:58PM

George... bummer!

FIRST Charge the battery for 24 hours with at least a 6 amp auto charger

Pull all 6 spark plugs....

Wire Throttle WIDE OPEN making sure chokes are open / vertical too!

Take a compression test! Report the PSI to us for each cylinder..

Many Autoparts stores will LOAN you a compression tester if you don't have access to one..





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Returning to my Corvair
Posted by: geomuck ()
Date: July 19, 2018 06:04PM

Thanks Matt, good advice! Will do.

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: RKF ()
Date: July 19, 2018 06:05PM

You've made a good start. You have determined that the problem is in the right cylinder bank (#1, 3, 5).

Before you try to start the car again, do a compression check. If one cylinder has low or no compression, that is where your problem is.

Since you said it suddenly began to knock and smoke, my guess is a dropped valve seat.

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Re: Returning to my Corvair
Posted by: steve c goodman ()
Date: July 19, 2018 06:18PM

George I suggested to you a club tech session for northern RMC club members. It is being planned for Oct. I presume you are still getting the DENVAIRNEWS?

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: Returning to my Corvair
Posted by: steve c goodman ()
Date: July 19, 2018 06:23PM

Well sorry everyone that was meant to be a PM to George but I missed the PM button. Apologies for wasting your time.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: Returning to my Corvair
Posted by: JimBrandberg ()
Date: July 19, 2018 07:44PM

Black smoke often means too much gas. Be on the lookout for a flooding carburetor on that side. Just one possibility but I thought I'd throw it out there. Some of the mechanical fuel pumps these days are putting out too much pressure and they can overwhelm the carburetor inlet needle and seat. Again I have no idea what the trouble may be, just going off the black smoke thing.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Returning to my Corvair
Posted by: Timothy Shortle ()
Date: July 19, 2018 09:08PM

You are lucky that you have a professional Corvair business close to you.
Rear Engine Specialists is probably within 20 miles. For me he is 360 miles away.

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Re: Returning to my Corvair
Posted by: geomuck ()
Date: July 20, 2018 02:42PM

@Tim: don't I know it! If I get in over my head, I can always just get on Steve's schedule smiling smiley

@Jim: Thanks, I'll keep the carb suggestion in mind as well!

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: geomuck ()
Date: July 29, 2018 02:35PM

I finally got to the compression test today. I decided to go ahead and buy a compression gauge, so I had to wait for it to arrive. I also bought a remote starter. I'll use this opportunity to stock up on tools smiling smiley

5: 0 psi
3: 165 psi
1: 165 psi
6: 150 psi
4: 175 psi
2: 120 psi

I was surprised at how high MOST of the cylinders were!

But... yeah. Number 5 is the problem, obviously. I'm reading up in the forums here to figure out next steps (I'm guessing that it involves removing the head?). As always, suggestions gratefully and humbly welcomed!

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: geomuck ()
Date: July 29, 2018 02:36PM

Oh, forgot to mention -- I did squirt some oil into number 5, to see if that would do anything. It did not spinning smiley sticking its tongue out.

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: MattNall ()
Date: July 29, 2018 02:41PM

Easy fix... get your club members to have a Wrench day..... get another head ready..





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Returning to my Corvair
Posted by: Lane66m ()
Date: July 29, 2018 02:42PM

Take plug out. Put that cylinder on TDC and pump air into it. If air escapes, is it from intake or exhaust. Then pull valve cover and loosen rocker nuts on that cylinder to ensure valve is not held open. Re apply air. Still escaping, remove head for repair.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1968 Camaro SS Coupe 350 CI 295+ HP PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2018 Chevrolet Silverado LTZ Z71 Centennial Edition
1947 Farmall A tractor 15 hp





Edited 1 time(s). Last edit at 07/29/2018 02:42PM by Lane66m.

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Re: Returning to my Corvair
Posted by: stitch ()
Date: July 29, 2018 02:42PM

#5, Always a B***ch!
Dropped valve seat..

"If you can't fix it with a Hammer, you have an Electrical problem."
Stitch...
Schertz, Texas.
(Smallish town/burg 17 mi. NE of San Antonio)

!967.. 4th body
8th off the line

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Re: Returning to my Corvair
Posted by: TerribleTed ()
Date: July 29, 2018 02:47PM

Most likely a dropped valve seat in #5, but, there could be other causes. Next step is to remove the right valve cover to inspect the valves and pushrods. You may find an issue right there like a broken rocker arm, bent or broken push rod, busted valve springs, valve stuck in (might be caused by a dropped seat or a valve problem), etc.. Seeing no immediate cause inside the valve cover then pulling off the right head for inspection is next.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: Returning to my Corvair
Posted by: geomuck ()
Date: August 01, 2018 06:59PM

Thanks everyone! Disassembly begins this weekend. I'll post updates and pics (and questions spinning smiley sticking its tongue out).

I only have a couple of hours per weekend to do some wrenching, but I'm looking forward to it! It'll be fun to get into the guts.

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: geomuck ()
Date: August 05, 2018 05:12PM

Well, I pulled the valve cover and looked at the rockers. I don't see anything obviously bad. I turned the engine over with the remote starter, and both the intake and exhaust rods are moving, so nothing is obviously stuck or broken (video here).

So now I'm into disassembly, to pull the head. Good times! I got the right-side carbs off, and three of the four carb studs (the fourth is thus far being stubborn). Picture of where I'm at is here.

Moving forward, a couple hours at a time...

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: stitch ()
Date: August 05, 2018 05:43PM

Hope it's something simple George, But my money is on a tossed vale seat...Hope not. confused smiley

Edit...Been there..

"If you can't fix it with a Hammer, you have an Electrical problem."
Stitch...
Schertz, Texas.
(Smallish town/burg 17 mi. NE of San Antonio)

!967.. 4th body
8th off the line



Edited 1 time(s). Last edit at 08/05/2018 05:44PM by stitch.

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Re: Returning to my Corvair
Posted by: geomuck ()
Date: August 05, 2018 05:46PM

Surprisingly, I'm alright with it. I'm learning and gaining a little confidence with each turn of the wrench hot smiley

George Murnock
1967 Corvair Monza convertible 140/4, owned since August 2013
Near Boulder, Colorado



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Re: Returning to my Corvair
Posted by: American Mel ()
Date: August 05, 2018 06:13PM

geomuck Wrote:
-------------------------------------------------------
. . . . . . . I got the right-side carbs off, and
> three of the four carb studs (the fourth is thus
> far being stubborn). . . . . . . . . . . . .


Unfortunately it is the long stud that you are have trouble with. Just for future information. You do NOT need to remove the shorter studs. Just the long ones. But, since you have the short ones out, it will be a little easier to get the head off.

.
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
'66 Monza Coupe - 4spd, 140 Daily driver beater
'67 Monza Vert. - PG, 140 Daily driver beater
'67 A/C Moredoor Monza - 140 4-spd. driver

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