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> Is This Going To Be A Problem, Valve Damage? *NEW PHOTOS, COMMENTS RQSTD*
kconway
post Jun 3 2008, 07:25 PM
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I'm changing out the pushrod tubes and seals and found this. Do I need to replace this valve?

Kev

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BarberDave
post Jun 3 2008, 07:33 PM
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Absolutely...... YES......... Dave (IMG:style_emoticons/default/slap.gif)
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PeeGreen 914
post Jun 3 2008, 07:34 PM
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Yes. You want it to be a nice smooth flat surface.
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BarberDave
post Jun 3 2008, 07:38 PM
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SLITS
post Jun 3 2008, 07:39 PM
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To save the valve, you could have the tip machined flat and use a lash cap.
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BarberDave
post Jun 3 2008, 07:44 PM
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I would throw away all of them and the rockers, change just 1 and next week

others will go. Matter of fact I would have a good head shop ,( Len's ) rebuild

them. Dave (IMG:style_emoticons/default/slap.gif)
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BarberDave
post Jun 3 2008, 07:48 PM
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SLIT"S Wouldn' t machineing the valve remove the heat treat makeing it to

soft even for a lash cup to last very long? Dave (IMG:style_emoticons/default/slap.gif)
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kconway
post Jun 3 2008, 07:49 PM
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Can someone explain to me what the likely cause is. Car ran fine. Need a cheaper solution to rebuilding the entire head and pretty sure I'm not the guy to do it. Can I take the whole head to RIMCO or do they just do the machining?

Just like peeling an onion...
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ericread
post Jun 3 2008, 08:56 PM
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Nah, You can buff that out. (IMG:style_emoticons/default/av-943.gif)
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SLITS
post Jun 3 2008, 09:14 PM
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QUOTE(BarberDave @ Jun 3 2008, 06:48 PM) *

SLIT"S Wouldn' t machineing the valve remove the heat treat makeing it to

soft even for a lash cup to last very long? Dave (IMG:style_emoticons/default/slap.gif)


The lash cap is hardened and fits over the tip of the valve. The hardened surface takes the sliding of the rocker tip otherwise the rocker tip would "dig" into the malable surface and "mushroom" the stem tip.

Didn't say it was the way to go, but it is one way.
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Allan
post Jun 3 2008, 10:53 PM
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QUOTE(kconway @ Jun 3 2008, 06:49 PM) *

Can I take the whole head to RIMCO


Yes
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brer
post Jun 3 2008, 11:17 PM
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You can get it done right here in san diego. Better than RIMCO by a mile.
Around 600+/- for the pair, if no welding. Thats a rebuild.

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kconway
post Jun 3 2008, 11:20 PM
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QUOTE(brer @ Jun 3 2008, 09:17 PM) *

You can get it done right here in san diego. Better than RIMCO by a mile.
Around 600+/- for the pair, if no welding. Thats a rebuild.


You saying they would replace all the valves, springs, rockers in both heads for ~$600? Whats the place your speaking of?
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sean_v8_914
post Jun 3 2008, 11:21 PM
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if the engine is assembled and still in the car...and you don't want to drop it all, put lash caps on all 4 valves and drive it till she spits chunks
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kconway
post Jun 3 2008, 11:22 PM
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QUOTE(sean_v8_914 @ Jun 3 2008, 09:21 PM) *

if the engine is assembled and still in the car...and you don't want to drop it all, put lash caps on all 4 valves and drive it till she spits chunks


Its out on an engine stand.
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brer
post Jun 3 2008, 11:49 PM
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QUOTE(kconway @ Jun 3 2008, 10:20 PM) *

QUOTE(brer @ Jun 3 2008, 09:17 PM) *

You can get it done right here in san diego. Better than RIMCO by a mile.
Around 600+/- for the pair, if no welding. Thats a rebuild.


You saying they would replace all the valves, springs, rockers in both heads for ~$600? Whats the place your speaking of?



don bolton
Bugpatch 619-449-8670

thats just ballpark, you would have to talk to him about what NEW parts you want, and how bad your heads are of course.
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Jake Raby
post Jun 3 2008, 11:54 PM
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Brer,
I never knew that was the "don" you were referring to...

As far as that valve, well its a classic example of a valve that was ran loose for many miles... A lash cap is a band aid...

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HAM Inc
post Jun 4 2008, 08:09 AM
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Yep, loose valve adjustment, and or poor oil. Swivel screws would have prevented this problem, and the excessive guide wear that usually accompanies tip wear.
If you want to stretch the service interval, the lash caps will serve as a sutiable band aid. Make sure you replace the valve adjusters at that time, and you will almost certainly need to shim the rockers to account for the lash caps, unless your adjusters are wound in to deal with cam wear.
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brer
post Jun 4 2008, 10:49 AM
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QUOTE(Jake Raby @ Jun 3 2008, 10:54 PM) *

Brer,
I never knew that was the "don" you were referring to...

As far as that valve, well its a classic example of a valve that was ran loose for many miles... A lash cap is a band aid...



He's a great guy Jake.
Honest as they come.
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sean_v8_914
post Jun 4 2008, 11:24 AM
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yup, bandaids have their place. I'm a "do it right" kind of guy but i look at cost-benefit. I would prefer a rebuilt head but the banbaid might get you down the road happy for another year.
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