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#1
12-05-2018, 10:15 PM
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valve cover spreaders
Are spreaders used for all 8 valve cover bolts on a 66 326 ?
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#2
12-06-2018, 08:37 AM
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They can be. Cant hurt.
__________________
1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. |
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#3
12-06-2018, 11:47 AM
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thank you for your help
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#4
12-06-2018, 02:19 PM
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Yes. And I also use them to support the oil pan flange.
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#5
12-06-2018, 04:34 PM
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Always wondered why no one made, or at least I haven't seen them, load spreaders along this line for uses in various locations. This one I drew up is 2" long ... but length, depth etc. could be changed for different applications. Something that would really spread the load instead of just bend. This one is 1/2" thick ... so obviously different bolts would have to be used.
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#6
12-06-2018, 06:19 PM
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Cost. You'd have to cast or extrude that part. The stamped steel ones are cheap as dirt to make.
__________________
I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#7
12-07-2018, 04:57 AM
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I could machine those pretty easy from solid aluminum. Wouldn't be cheap though. Although I could do the prints and have them made 100 at a time for probably $5 each.
Without the fillet on the top outside edge, would take 15 minutes on the mill and the drill. Maybe I'll make one and post the results. |
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#8
12-07-2018, 01:19 PM
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Did up a quickie design and priced it.
Part seen below can be done for $3.25 each if ordered in a batch of 100. With a bit of tweaking I'd guess a finished product could be made for around $4.00 each .... perhaps up to 4" wide, and like this example 1/2" thick 6061 aluminum. Finish would be plain aluminum so the end user might have to polish them a bit if they wanted something fancy. Would probably be plasma cut or water jet, so edge finish might be less than perfect, if milled would be better. |
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#9
12-08-2018, 02:30 AM
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I don’t think Pontiacs we’re equipped with spreaders OEM.
As regards the CAD design ... man overboard! You are merely clamping down a sheet metal or cast aluminum valve cover. The thin “spring” style ones work fine and are only needed on valve covers already distorted from over tightening. |
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#10
12-08-2018, 06:04 AM
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Yep, in general, take your old valve cover and a good flat surface, pound out the distortion and don't over tighten the bolts and you are good to go. No need for spreaders if you have a good gasket, and an undistorted valve cover.
No excuse at all for cast valve covers to leak, they are very rigid. |
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#11
12-13-2018, 05:55 PM
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Can't make it to stiff they will deform the valve cover edge.They need to be made of some grade of spring steel so there is a way of seeing the load put on the edges of the spreader.
__________________
76 T/A 455, cnc chamber E heads,OF hyd roller ,yella terra shaft rockers 11.47 119 |
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#12
12-14-2018, 10:34 AM
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thanks for all the help to all.
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