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Question for those who have used Alex's Parts 4V valves
#1
The shop that is working on my '72 open chamber 4V heads say that my Alex's Parts exhaust valves sit a few thousandths lower in the seats than spec (speaking of which, what is spec?). Intake are within spec.

Fellow from the shop put his dial caliper on the head and the end of the original valve, then the Alex valve. The Alex valve was shorter by about .030 or so. The Alex valve claims to be 5.030” overall.

Anyone else experienced this issue? Do I have the wrong valves, or do the seats need to be machined? Anyone have the original specs?

-Kurt

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How to buy a '71-73 Mustang:
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#2
I did some research tonight. Near as I can figure it, the stock OAL for the Cleveland 4V valves are 5.21” OAL for the intake, 5.048” OAL for exhaust.

Alex lists OAL as 5.030” for exhaust.

Something is wrong here, but I need much more accurate data. One thing that did not go unnoticed was the thinner taper on the new exhaust valve vs. the original:

[Image: 2znoc9u.jpg]

That's accurately reflected on Alex's website:

[Image: 351c2.19-1.71a__25798.1370888954.1280.1280.jpg?c=2]

Strangely enough though, the 2V valves seem to be cut deeper.

[Image: 351C2V__49199.1313637411.1280.1280.JPG?c=2]

Ferrera lists 5.060” as the length for both 2V and 4V exhaust valves, which is exactly the .030 I'm missing.

Anyone here have an original shop book that can confirm the exhaust valve OAL for a '72 4V? Q-code, not R.

-Kurt

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How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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#3
According to my documents, all Cleveland inlet valves have an overall length of 5.235in and the exhaust valves are 5.050in in length, with a stem diameter of 0.341in

According to "The Essential Source Book - Ford Cleveland 335-Series V8 Engine 1970 to 1982"

2013 Ford Focus SE Flex Fuel 5spd - Daily Driver
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#4
MechEng;191459 Wrote:According to my documents, all Cleveland inlet valves have an overall length of 5.235in and the exhaust valves are 5.050in in length, with a stem diameter of 0.341in

Not that I doubt it, but if the intake spec is 5.235" for both 2V and 4V, why would Ferrea make their 4V inlet valves at 5.300" and the 2V's at 5.275"?

Just want to make sure that there are no spec. errors from that source, given the importance of getting the valvetrain perfect.

That said, if the exhaust valve spec is 5.050", it would seem as if the Alex 5.060" valves would be a better choice over the 5.030" that he specs for 4V, no?

-Kurt

[Image: satellite-valiant-mustang-license-tags-signature.png]
How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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#5
With the non-adjustable valvetrain in these engines .030" would make a huge difference in lifter preload and spring installed height. I've never heard of Alex parts, are they a wholesaler or discount parts provider? Decent valves are not that expensive, I like Manley for most applications. Engine Pro does have some nice options for less expensive good quality parts too.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

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#6
droptop73;191507 Wrote:With the non-adjustable valvetrain in these engines .030" would make a huge difference in lifter preload and spring installed height. I've never heard of Alex parts, are they a wholesaler or discount parts provider? Decent valves are not that expensive, I like Manley for most applications. Engine Pro does have some nice options for less expensive good quality parts too.

Indeed - though my concern at this point is not machining the material off the head if it's not necessary.

Alex's Parts is a wholesaler who has various companies manufacture his valves, depending on supply:

http://www.alexsparts.com/stainless-stee...2-19-1-71/

Do a search on the forum and online - everybody has reported good things about them in regards to Clevelands. One of our forum members has used them multiple times in his builds.

-Kurt

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How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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#7
Call them up and tell them your problem and I suspect they'll refund or find you the right part.

Your valve geometry and preload will be off if you use them and cutting the seats that much is probably a bad idea

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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#8
Jeff73Mach1;191520 Wrote:Call them up and tell them your problem and I suspect they'll refund or find you the right part.

Your valve geometry and preload will be off if you use them and cutting the seats that much is probably a bad idea

I have no question that he'll put together the right valves for me; Alex helped me out extensively to put together a package of retainers without the locks (as I had already bought the locks).

Now all I have to do is make sure I can call the damn shop in time.

-Kurt

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How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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#9
Do a search on the Ferrea site for "F6139" and I think you will understand. They make one valve that can be used in several engines with changes made to the rest of the valve train. Chuck
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#10
c9zx;191530 Wrote:Do a search on the Ferrea site for "F6139" and I think you will understand. They make one valve that can be used in several engines with changes made to the rest of the valve train. Chuck

Makes sense - but it leaves a whole lot of questions unanswered regarding the Alex valves.

If 5.050" is the proper height, what should I be doing about the 5.030" Alex valves? Obviously, I'll be asking for his advice on Monday, but I'd like to be armed with some suggestions so as not to fall into any other pitfalls.

-Kurt

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How to buy a '71-73 Mustang:
Rule #1: Assume all classic car sellers are guilty until proven innocent.
Rule #2: No classic car dealer is ever innocent; thus, they are all guilty.
Rule #3: Buy from trustworthy people: Fellow forum members. Visit 7173Mustang's For Sale forum.
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