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valve seats
Posted by: gee ()
Date: January 25, 2011 04:05PM

Was quoted a price of 20 dollars per seat for the 5/16 deep seats ;Is this a fair price ? Thanks ;Gee

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Re: valve seats
Posted by: Marco_a_p ()
Date: January 25, 2011 04:31PM

Installed? Or just the seat?

Marco
A 2nd Gen Monza Wagon, a 2nd Gen GB 8door, a 2nd Gen (61's were 1st Gen) R/s and a 62nd Gen Turbo coupe..

Hanging out with the scorpions, king snakes, road runners, coyotes and quails In the southern desert of the silver state
Mesquite NV 89024

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Re: valve seats
Posted by: gee ()
Date: January 25, 2011 04:44PM

Just the seat;

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Re: valve seats
Posted by: gee ()
Date: January 25, 2011 06:25PM

Also does anyone have any comments on peening the seats? Thanks Gee

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Re: valve seats
Posted by: danyarger ()
Date: January 26, 2011 01:21AM

Is there a way to keep the seats from falling out once they are installed? If the seats are steel and the head is aluminum obviously you cant tack weld them. Just curious what they do to prevent them from falling out.

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Re: valve seats
Posted by: danyarger ()
Date: January 26, 2011 01:21AM

Is there a way to keep the seats from falling out once they are installed? If the seats are steel and the head is aluminum obviously you cant tack weld them. Just curious what they do to prevent them from falling out.

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Re: valve seats
Posted by: lgoodwin ()
Date: January 26, 2011 01:46AM

Yes, you can "stake" them in using a punch to deform the alloy surrounding the seat in several places. Past discussions on this subject seem to concur that staking the seats is important on the 140 heads because they get so much hotter. Not sure if it's common practice (or even a good idea) to stake the seats on non-140 heads, but I'd imagine it's a good idea if done properly.

<table align='center' width='0'>
<tr>
<td><img src='[www.automation-scs.com]; alt='1962 Corvair 900 sedan' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1967 Corvair Monza 140/4-speed' width='190' /></td>
<td><img src='[corvaircenter.com]; alt='1968 Corvair 500 coupe' width='190' /></td>
<td><img src='[www.automation-scs.com]; alt='1983 Mexican Mustang 5.0' width='190' /></td>
<td><a href='[www.automation-scs.com&]; target='_blank'></a></td>
</tr>
<tr>
<td align='center'><font size='1'>1962 900 sedan needs a home</font></td>
<td align='center'><font size='1'>1967 Monza 140/4-spd</font></td>
<td align='center'><font size='1'>1968 500 coupe (now my son's)</font></td>
<td align='center'><font size='1'>1983 Mexican Mustang 5.0</font></td>
</tr>
</table>

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Re: valve seats
Posted by: Anonymous User ()
Date: January 26, 2011 02:20AM

i dont think its a good idea to stake/punch/peen any seats. staking doesnt do any good & probably makes things worse.

-Scott V.

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Re: valve seats
Posted by: gnvair ()
Date: January 26, 2011 04:53AM

Staking doesnt do anything. I personally think its wishful thinking.
Best bets are to have the seats replaced with ones that fit deeper into the head as well as having a tighter press fit.
It also helps to clear about the slag and other obstructions between the fins so you can get some air flow through the heads. This is especially critical on 140's.

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Re: valve seats
Posted by: Bob ()
Date: January 26, 2011 11:03AM

for example, Wheelerizing, $225 parts and installation, silicone bronze, lifetime guarantee. [www.wheelerizing.com]

Other shops may be similar.


BobThomas68Monza

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Re: valve seats
Posted by: MattNall ()
Date: January 26, 2011 11:26AM

I Wheelerizing still in business?

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: valve seats
Posted by: Anonymous User ()
Date: January 26, 2011 06:09PM

MattNall Wrote:
-------------------------------------------------------
> I Wheelerizing still in business?

not for at least 3 yrs now. the site is still up.........strange.

-Scott V.

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Re: valve seats
Posted by: Goldenhands57 ()
Date: January 26, 2011 09:48PM

A good place to contact on the process is Falcon. Mark Petniunas. I quote from WW's website and concur IF this what your looking for as far as correctly installed valve seats:

(quote from The Hangar, December 2005)

" Before we dig into it, let me address a little feedback we received from our December 7 post on heads and carburetors. Although I worded it carefully, some people asked for a further clarification on the applicability of the Falcon Automotive cylinder heads to their particular Corvair powered project. Some people wondered about the price of it, and some asked if the concept of high end cylinder heads, and replacing the seats and guides, was new.

This is a good illustration of the difference between what people talk about and what gets built and goes flying. About half the engines we built in the shop this year went out the door with high end cylinder heads in place. Here are a few prominent examples: At Corvair College #8, we assembled and ran Dan Weseman's Cleanex engine. It's a 3,100cc engine, and Dan did not cut a single corner building it. He told me that he has about $7,000 in it. About $1,000 of this was money well spent on the cylinder heads. Although Dan had his done by Jeff Ballard, the work is in the same scope as Falcon Automotive cylinder heads. Dan's engine now has 40 flight hours on it. Our own 3,100 engine has approximately $1,100 invested in the cylinder heads. I had this work done by Bob Sutcliffe many years ago. It now has 85 flight hours on it. All three of the 2,900cc engines built and run at our place in the past year had more than $1,000 in the heads. Steve Glover's 2,700cc engine had $750 in the heads, and they did not have replaced seats. None of these prices include the intake pipes being welded on.

This money was not wasted. When the seats and guides are replaced in a Corvair head and it's done properly, and first class valves and springs are used, the already stout Corvair gets closer to the bulletproof category. Typically, homebuilders have a valve job done, replace the valves and springs, have the head gasket area cleaned up, and have the exhaust guides replaced. What I've just listed generally exceeds $500. Going the extra distance, to me, just makes sense. One builder told us that he felt the engine wasn't as inexpensive as it used to be. Let me add this perspective: You can still build an exact replica, parts and procedure wise, as Bernie Pietenpol taught homebuilders to do in the 1960s. These engines certainly ran and flew, but my extensive in person contact with homebuilders tells me that very few people are interested in building this type of engine today. " (end quote)

So.. the high road is not a cheap one ..however..amoritize this additional cost over the 30+ years your Corvair engine, which will reliably serve you and it's less of a shock. Note: Aircraft conversions per WW's manual require intake tubes to be welded to the stock carb pads which permits a single aviation carburetor to be used. This is not something needed for a car (so saving that cost). I quoted here in order to demonstrate the thinking behind costs and valve seat work. Mark is not a machinst..he is an artist in performing machine work. I've never met him in person but I have seen his work in person. It's beyond skill at his level.

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