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Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 23, 2017 03:32PM

All,

In tearing down my engine for rebuild, my mechanic removed all the block to head studs. I've never seen a Corvair mechanic do that. Should I be worried?

-Mark

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: MattNall ()
Date: October 23, 2017 03:43PM

YUP!! unless it was to be built as a RACE engine.....you never remove studs that are tight..





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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: davemotohead ()
Date: October 23, 2017 03:44PM

Why in tarnation would he do that?confused smiley





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)




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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Timothy Shortle ()
Date: October 23, 2017 04:06PM

I second what Dave said. Now answer the question Mark.

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 23, 2017 04:22PM

You ask him. I didn't pull them.

Now I suppose the only fix is to buy oversize studs. Clark's list price $414 for the full set. YIKES!

Would it be cheaper just to get another block?

-Mark

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: American Mel ()
Date: October 23, 2017 04:25PM

67 airvair Wrote:
-------------------------------------------------------
> You ask him. I didn't pull them.
>
> Now I suppose the only fix is to buy oversize
> studs. Clark's list price $414 for the full set.
> YIKES!
>
> Would it be cheaper just to get another block?
>
> -Mark

No, I will not ask him.
BUT, I suggest YOU do!
If you now need oversized studs, you should make him buy them.
And then take your engine somewhere else to be rebuilt!

.
-----------------------------------------------
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

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Seth Emerson ()
Date: October 23, 2017 04:32PM

Mark - Unless you are terribly concerned about the Application code stamped on the block, I suggest you go find another set of cases and use those. If studs don't come out on their own - during disassembly - OR - reassembly, leave them in place. Maybe the guy took it as a personal challenge to see if he could actually get them all out.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: cnicol ()
Date: October 23, 2017 04:47PM

Don't panic (yet)! Most of the time, standard size studs will re-install with the proper torque and you're good to go. All bets are off if he chased the threads though? *As I recall*, if the new stud installs with 10 to 30 ft-lbs you're good to go.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: davemotohead ()
Date: October 23, 2017 05:04PM

But! wonder if he marked what hole they came out of? I would tar and feather him! and Mark, you should know better than taking your Corvair engine to a Ford mechanic!





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)




Sign my guest book!
[motoheadmall.com]
-----------------------------------
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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Bob Helt ()
Date: October 23, 2017 05:20PM

Mark,
Have him reinstall the studs and do a PULL TEST on every one of them. If they pass the pull test they will work OKay. Actually, in my openion the pull test at 40 psi is all that is necessary to reuse them.

Bob Helt

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 23, 2017 05:29PM

He's not a dedicated Ferd mechanic, just a general all-around mechanic. Up until now he's been just fine with my Corvairs. He "learned" under an old-time Corvair mechanic and Corvair owner (who did a total pavement-up resto of a Spyder once), and bought the shop after the old timer died. He's been there since the late '70's. And this is the first time I've ever had a reason to question his work.

BUT...

The engine is the original one to the car, and had sat for 35 years. One piston was stuck in the jug when he took it apart. That I do know. But I will see him tomorrow morning....

-Mark

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Lane66m ()
Date: October 23, 2017 05:36PM

Maybe if you post the block number, someone might have one with same number. But has studs in it.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1966 Corsa Turbo Coupe, 180 hp 4 Spd
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2015 GMC Sierra SLT Crew Cab
1968 Camaro SS Coupe 350 CI 295+ HP PG
1947 Farmall A tractor 15 hp


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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 23, 2017 05:52PM

I think the block number is T1123RK. It's a '67 110/auto/air car, built the first week of December of '66. They built 27,253 cars that year. and it's VIN is 13627, making it THE middle car in the entire production run.

I'm not anal about the numbers/statistics on the car, am I? grinning smiley

-Mark

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Lane66m ()
Date: October 23, 2017 06:22PM

No, you just have the facts on your car and where it sits in the model run. Just like any classic Corvette would also know for their cars. Not many Vair owners remember that much of their car. Some do most don't. I know just enough of mine to be informed but not overly intelligent.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1966 Corsa Turbo Coupe, 180 hp 4 Spd
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2015 GMC Sierra SLT Crew Cab
1968 Camaro SS Coupe 350 CI 295+ HP PG
1947 Farmall A tractor 15 hp


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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Wagon Master ()
Date: October 23, 2017 07:29PM

I'd go with the stud reinstall and torque test on his dime. What's surprising is he's been doing this since the late 70's with no I'll effects, while the rest of us have thread pulling issues on about every third block.

'64 Monza Coupe 140 4 speed
'61 700 Lakewood 95 4 speed
'69 Monza Convert. 140 Auto.

Been aircooled since 1973
Northwest Ohio

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 24, 2017 02:51AM

Exactly why I was surprised to see the block stripped. It's a low miles block, just a hair shy of 63,000 original miles, but in and out of barn storage for the last 38 years. I'm going over to see him first thing this morning.

-Mark

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: JimBrandberg ()
Date: October 24, 2017 04:56AM

Oversize studs going into a hole that doesn't need them can be extremely difficult if they go halfway in and just stop, refusing to go in further or come back out.
I try to remove studs from bad crankcases sometimes and can't get them out even by heating the aluminum, but in that case I don't spend much time at it, I'm just looking for spares anyway. I'm wondering how he did it. I just use the double nut method. I've got a "jaws" type stud removal tool but don't use it.
When a stud comes out when untorquing the head, if there's no aluminum on it, I just put it back in with red Loctite. I have a rocker stud with a ball bearing inside as a tool for inserting them when the head is still on. If it goes in easy I suppose I would consider an oversize stud but they're so spendy.
I don't know if I'd consider it the end of the world because the studs are out, not knowing how he accomplished it. I think sometimes the "jaws" type tool scores the stud shank and if so I'd be worried about a weak spot.
I did an engine that I only went as deep as the rod bearings. Someone had cut the studs off on one side and I was determined to get them out. I welded nuts onto the studs and used torch heat on the aluminum and got them all out but it was a struggle. One of them had repeatedly broken off and I was down to the nub but got it on the last try.
I could be off base here and I'm open to reading more about it.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: Layton Curtis ()
Date: October 24, 2017 05:21AM

Why don't you ask him why he did it?

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: cnicol ()
Date: October 24, 2017 06:26AM

Re: Oversized studs, I've had the same experience as Jim: OS studs won't fit in a threaded block-hole that isn't oversize. If the stock studs install with proper torque an oversize stud definitely won't fit. I've replaced a lot of damaged studs over the years but I could count the number of OS studs I've needed on two or three fingers. 19 out of 20 times all that's needed is a good standard size stud and you're good to go.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Should I be worried? Block to head studs questionconfused smiley
Posted by: 67 airvair ()
Date: October 24, 2017 02:49PM

Ok, guys. I found out what happened. The reason the studs were removed is because the top nuts were rusted solid onto the studs, and that is the only way they would come out. He did get the nuts off the studs eventually, but the threads are badly pitted. I may have to replace the studs anyway because of that. At $414 a set, it may be a better idea to just find a usable block.

He also saw what was posted this morning and got so upset that he decided that he didn't want to build my engine. So apparently I'll also need to find a new mechanic to build my engine.sad smiley

-Mark

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