You might also need to take out one of the exhaust valves (the only ones
that have the hardened seats; intakes don't need them-don't get that hot).
The seats are under the valves and may not be visible with the valve in
place (may be able to see if just open the valve & peek under; again, with
head off of engine).
Regards,
Doug Pewterbaugh
dpewter@msn.com
Denton, TX
49 3104 216 5-window
----- Original Message -----
From: "Bobby D Keeland" <bob_keeland@usgs.gov>
To: <oletrucks@autox.team.net>
Sent: Thursday, March 20, 2003 4:38 PM
Subject: Re: [oletrucks] Running unleaded
> My mid-60s 283 was rebuilt about 12-15 years ago and never run. Is there
a
> way that I can pull the valve cover and tell if the seats were hardened or
> do I have to pull the heads?
>
> BobK
> 51 5-window (in pieces)
> Arnaudville, LA
>
>
>
>
> Cameo3124@aol.com
> Sent by: To:
oletrucks@autox.team.net
> owner-oletrucks@aut cc:
> ox.team.net Subject: Re: [oletrucks]
Running unleaded
>
>
> 03/20/03 01:43 PM
> Please respond to
> Cameo3124
>
>
>
>
>
>
> 1972 and newer chevy small block heads had hardened seats for running
> unleaded gas, unless the 327 you have is a hi compression engine you
> shouldnt have any problem running unleaded gas, performance will slowly
> fall away as the valve seat wear do to lack of lead lubrication .. you can
> buy in some states lead gas additive that will enable you to run unleaded
> gas without eventual valve damage,, but additives can be expensive over
> time. If your engine is in pretty good shape and all you want to do is run
> unleaded gas you may consider either buying a set of heads that are 72 or
> newer or have yours reworked with new hardened seats,, check with your
> local machine shop for pricing,, I just paid $180 to have a set of heads
> reworked with out the added expense of the machine work, labor and cost of
> seats, I imagine it would be cheaper to buy a reworked set of 72 and newer
> heads,,, if you have a higher compression 327 engine with smaller chamber
> heads you may probably want to buy a !
> later set of heads with a larger combustion chamber and install them on
> your block,,,the higher compression heads you dont want can be easly sold
> to a corvette enthuisast or some one who is builing a race engine.. if
you
> remove your valve covers you can obtain the casting numbers, as well as
> determine the year they were made from the casting ID, on the front of the
> head there are distinct casting markes that help Id them too, but the best
> way is to pull the valve cover,,, becareful when buying heads,there are
> some heads that are of lighter casting that are undesireable,,They are
> prone to cracks because of the lihter casting and poor circulation.. you
> can forward your casting numbers to me and I can look them up and give you
> the information on your heads,, someone may have allready installed later
> heads on your engine and you may not need to do anything.. good
> luckRichard57 cameo
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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