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01-10-2023, 06:34 AM

#31

Unlimited jd

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01-10-2023, 06:36 AM

#32

PQ290Enticer

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Ouch...

01-10-2023, 07:03 AM

#33

Wildman_grafix

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Quote:

Originally Posted by PQ290Enticer

This is only funny for you guys. Believe me, I'm not laughing even a little bit.
I just visited the AFR website and looked at the info for my heads (I'm calling it small print) and low and behold you OSO guys are f'n CORRECT!!!

Valve Guide Clearance - Your AFR Heads come with proper guide clearance (.0012"-.0016") for most applications. Boosted/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.

So while you guys are on a roll what should be the clearance for marine use for these heads?

Well at least they are still out, not that big of a deal at this time to pop the heads of and get the clearance correct. I would call your self lucky. While at it your guy can make sure all spring install heights are correct.

BTW

There used to be a guy on here that dropped a set of "ready out of the box" heads and they seized a valve, forget his screen name Had a old Cig Mystic and then a 38 gun, from Northern Ohio. Full force?

Last edited by Wildman_grafix; 01-10-2023 at 07:05 AM.

01-10-2023, 07:06 AM

#34

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“But the guys on the internet said”

I know, tough to say to someone face to face or on the phone huh.

01-10-2023, 08:23 AM

#35

PQ290Enticer

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Thanks to everyone who kept after me about this. I wouldn't have given it a second thought if not for you guys and yes, I'm sure that they would have been a couple grenades the first time out.
I will remove them and get things figured out with the machine shop. Still looking for the clearance required for marine use so if anyone knows I would appreciate it. I do have an email into AFR but I have emailed them in the past with no response. AFR says they are now .0012 - .0016
I could have kept my findings to myself but you guys really deserve to know that you were right (of course you knew that already) and I am grateful for your help.
So, can I reuse ARP fasteners or are they a one time use? Kicking myself now because my builder suggested going with head studs and I said, no need, these are never coming off again.

I hope looking into this will reveal what is wrong with the valve train. These were going into a boat but they would have worked nicely in a car or truck too which AFR says the clearances are good for.
I'll let you guys know what the machine shop finds.
I'll have them check the "spring install heights". Interested in anything else I should ask about.
Thanks again for all your help

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Unlimited jd (01-10-2023)

01-10-2023, 08:41 AM

#36

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Arp bbc head bolts are reusable.

please double check your spring psi’s as installed and open heights. Address this if an issue.

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PQ290Enticer (01-10-2023)

01-10-2023, 09:03 AM

#37

PQ290Enticer

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Installed height for both are: 1.920 and 155lbs
Open ht is 1.370 and 340 lbs
bind is 1.187 and 550lbs.
I have no idea what this means. It's on the build sheet.

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Unlimited jd (01-10-2023)

01-10-2023, 09:11 AM

#38

Knot 4 Me

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Quote:

Originally Posted by Unlimited jd

Unless something has changed at afr, their valve guide clearance has always been too tight for marine use. I had a set cost me a lot of time but luckily not too much $$$ even though the “salesman” ensured me many many times they were fine and to the “marine spec”

I believe this bit Full Force awhile back as well.

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Wildman_grafix (01-10-2023)

01-10-2023, 09:50 AM

#39

snapmorgan

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Bit me as well on a new set of Brodix heads. We set mine at .002, no more problems. It is a pretty tricky measurement though, if you have 10 people measure it, you will get 12 different numbers.