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Cylinder Heads Done Right
Posted by: ccpinc ()
Date: September 24, 2011 05:07PM

Every rebuilt engine we do includes a well done set of completely rebuilt cylinder heads. This is the area of many rebuilds that is overlooked or skimped on. In my estimation, proper cylinder head rebuilding can mean the differnce between a good running, reliable and durable engine for years to come versus an engine that will run okay for a little while. I realize excellent cylinder head rebuilding is not cheap but it really does pay off in the long run.

Jeff Williams

CALIFORNIA CORVAIR PARTS

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Re: Cylinder Heads Done Right
Posted by: 65_Turbo ()
Date: September 24, 2011 05:21PM

I saw these at your shop last week, they look sweeeeet!smiling bouncing smiley

Bruce
65 Corsa Vert first car
65 Corsa Turbo Vert current car
65 Monza Sedan "Airvair"
Bolingbrook, Il
Corvair Society of America
Chicago Corvair Enthusiasts
Frankfort Car Club



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Re: Cylinder Heads Done Right
Posted by: macavs ()
Date: September 24, 2011 09:24PM

OK Jeff, please explain what you do to insure a "quality" rebuild on a set of 140hp heads that will last me many years of happy motoring without the possibility of dropped valve seats.

Not doubting that you do a fine job of head rebuilding, just wondering what make you the go to guy?

Mike C ........... Northern Indiana

1965 Corsa

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Re: Cylinder Heads Done Right
Posted by: Johnniespeed ()
Date: September 25, 2011 01:27AM

Jeff, heads look great, obviously not your first rodeo. No need to debate your proprietary process with me. Life is good when the seats stay in.

John



Snowy Sparta Michigan.

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Re: Cylinder Heads Done Right
Posted by: Chilly Willy ()
Date: September 25, 2011 02:52AM

macavs Wrote:
-------------------------------------------------------
> OK Jeff, please explain what you do to insure a
> "quality" rebuild on a set of 140hp heads that
> will last me many years of happy motoring without
> the possibility of dropped valve seats.
>
> Not doubting that you do a fine job of head
> rebuilding, just wondering what make you the go to
> guy?


That's a good question thumbs up

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Re: Cylinder Heads Done Right
Posted by: lgoodwin ()
Date: September 25, 2011 04:08AM

They look great, Jeff. However, I second Mike C's question. What specifically do you do that makes them great heads? My question is mainly regarding valve seats, but what about mating surfaces, etc.? Do you do the same work on every set of heads, or do you handle them on a case-by-case basis? One more thing, what is the price?
Thanks in advance for answer these questions in a public forum.

1962 Corvair 900 sedan1967 Corvair Monza 140/4-speed1968 Corvair 500 coupe1983 Mexican Mustang 5.0
1962 900 sedan needs a home1967 Monza 140/4-spd1968 500 coupe (now my son's)1983 Mexican Mustang 5.0

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Re: Cylinder Heads Done Right
Posted by: richard1 ()
Date: September 25, 2011 11:09AM

They certainly look nice.

For lack of confidence in anyone around this town and advice from some members here I opted to leave my seats in and clean up the rest by myself. At least I know who to blame if they fail.
I hired out the valve guide replacement.






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Re: Cylinder Heads Done Right
Posted by: jasvair ()
Date: September 25, 2011 12:53PM

The best head work I have ever seen is by Michael LeVeque in Indiana. He has a process that replaces the seat properly and has a special way of prepping the heads so the seat does not drop.
The other machine shop that does excellent work is EMS in LA.
John Sweet

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Re: Cylinder Heads Done Right
Posted by: davemotohead ()
Date: September 25, 2011 01:19PM

Well I kinda think Jeffs Heads would be top notch! He Not only sells parts but has a Big Shop/Repair service as well,,And I would Think that He Would not Want ANY engine he built for a customer to come back to Him destroyed From a droped Valve Seat,,I know I wouldn't Cut corners if I was running a Shop like that,,I have been running stock heads in my yellow bannana for almost 20 years with no problems as of yet,,But every time I drive more than 100 miles from Home out of my AAA tow safety net,, I turn the radio down and keep a Fear full ear trained on the enevitable tic tic tic of my stock seat time bomb! I am having some deep seat heads done as of late and will start deep seating all my heads,,I have played Russian Valve seat Roulette for too long and want to stop driving in fear!grinning smiley



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Re: Cylinder Heads Done Right
Posted by: FLSteve ()
Date: September 25, 2011 01:47PM

In reply to [corvaircenter.com]

jasvair Wrote:
-------------------------------------------------------
> The best head work I have ever seen is by Michael
> LeVeque in Indiana. He has a process that
> replaces the seat properly and has a special way
> of prepping the heads so the seat does not drop.
> The other machine shop that does excellent work is
> EMS in LA.
> John Sweet


Who is EMS? Do they have a web page?

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Re: Cylinder Heads Done Right
Posted by: Johnniespeed ()
Date: September 25, 2011 01:52PM

Perhaps there should be a new topic posted to discuss and debate valve seat retention, and or metalurgy.
I think every new car sold today has aluminum heads and to drop a valve seat, is a non-issue.
It would be nice to compare the process of each Corvair engine machinist, process of seat retention to each other and to the new cars.

John



Snowy Sparta Michigan.

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Re: Cylinder Heads Done Right
Posted by: SpyderMan ()
Date: September 25, 2011 02:03PM

Water cooled motors don't get as hot as air cooled motors. More heat = more expansion.

Sam Russell
Chapel Hill NC
1962 Monza Wagon
1964 Spyder coupe


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Re: Cylinder Heads Done Right
Posted by: davemotohead ()
Date: September 25, 2011 02:03PM

Some newer cars drop valve seats as well.

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Re: Cylinder Heads Done Right
Posted by: Phil Dally ()
Date: September 25, 2011 02:08PM

I'm not sure what Jeff uses but I'm also sure it's top notch.

I've been using use Beryllium Copper seats...problem solved.

This material exhibits very little expansion or contraction.

My guy Slover gets them from the same guy that supplies NASCAR.

As usual anything above the normal is more expensive.

Beryllium is toxic so I'm sure thats where the cost is.

BTW: My Inconel valves get a little pricey also.

The X-15 was skinned with Inconel...it went 4000 MPH. cool smiley


Paso Robles, CA (almost) Unsafe At Any Landspeed
Palmtuckey, CA (not for long) We're Outta Here!!!
Sidewinders (est 1938) CORSA Member-Corsa West
High Desert Corvairs-Corvanatic-Ventura County Corvair
Angel Fan Since 1978...HALO POWER!! So Cal Gas Co Since 1974 (retired)
L/M Landspeed Coupe-65 Corsa-62 Rampside-B&M Blown Mid Engine Funco Sandrail
Next Build L/M ADE/BBC/PG/QC Street Racer-Current Vehicles in My Possession is 12

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Re: Cylinder Heads Done Right
Posted by: macavs ()
Date: September 25, 2011 03:36PM

Let me be clear. I do not doubt that Jeff does good work. I just want to know why we should choose him on probably the weakest link of a Corvair engine.

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Re: Cylinder Heads Done Right
Posted by: 66vairman ()
Date: September 25, 2011 04:37PM

Gee Jeff you opened a can of worms.

Fact is most Corvair vendors and shops send their heads out to a machine shop. And of course they don't want to give that information away. Bottom line is that even if you find Jeff's head guy, you'll probably pay about the same as you'd pay Jeff (vendors get quantity discount) and of course Jeff has a reputation for taking care of any issues, which is worth a few bucks extra.

Finding a machine shop with Corvair experience is the key, and checking references is required.

Air cooled aluminum heads are not the same as the modern liquid cooled aluminum heads. And the number of machine shops that have experience with the old VW, Porsche, Corvair heads is small.

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Re: Cylinder Heads Done Right
Posted by: Chilly Willy ()
Date: September 25, 2011 07:31PM

No can of worms here. grinning smiley
A vendor comes in and says he does heads right. a couple of questions on how, is not a can of worms. winking smiley

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Re: Cylinder Heads Done Right
Posted by: richard1 ()
Date: September 25, 2011 08:09PM


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Re: Cylinder Heads Done Right
Posted by: ccpinc ()
Date: September 25, 2011 08:40PM

I'm continually amazed by how many CORVAIR engines that are described as "rebuilt" have very little head work performed. Considering the importance of this work to the overall dependability and performance of the engine, I personally have a hard time calling an engine rebuilt unless the heads are rebuilt too. All of our rebuilt engines have the heads completely gone through as you can see from the photos of our current projects in our final assembly room. Of course removing the old seats, remachining the seat registers, heating the heads and installing deep seats, removing and replacing the guides (using oversize .001-.004 bronze alloy), surfacing the head gasket areas, milling the valve cover rails, repairing all damaged threads by reweld or inserts, performing a multi-angle valve grind, installing new springs, checking assembled spring heights and pressures, pressure testing all valves up to 300 psi after assembly and cc'ing each chamber for final compression ratio upon assembly onto engine increases rebuild costs. I posted this so those interested in having their Corvair engine rebuilt to last and run well know what should be included. Im sure we are not the only source for competent cylinder head rebuilding but when comparing rebuild costs from any shop or even some guy at his house one should compare apples to apples to get a keen sense of value.

Jeff Williams

CALIFORNIA CORVAIR PARTS



Edited 3 time(s). Last edit at 09/25/2011 08:43PM by ccpinc.

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Re: Cylinder Heads Done Right
Posted by: macavs ()
Date: September 25, 2011 08:45PM

Thanks Jeff! Now we know.

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