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| Camshaft retainers https://www.slantsix.org/forum/viewtopic.php?t=67278 |
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| Author: | Badvert65 [ Sat Jun 03, 2023 9:07 am ] |
| Post subject: | Camshaft retainers |
For those guys who build their own engines, what sort of clearance figures have you come up with between the cam bolt and the timing cover. On the engines I have on hand, I have measured about 0.25 inches of clearance. I am working on a cam button for the slant, a trim to fit (for clearance), that basically fits over the cam bolt. I was going to just make it 1/2 inch "tall" but the engineers have told me that this will cause some issues related to shrinkage and thick parts. I/2" would have left plenty of room to trim for clearance, but now I am thinking I might just go with something like 0.35 - 0.40" height. Any data you guys can offer here would help. |
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| Author: | Rick Covalt [ Sat Jun 03, 2023 9:36 am ] |
| Post subject: | Re: Camshaft retainers |
I run a rocker bolt through timing cover. Honestly the timing cover is pretty flimsy for that but I run mine in until I see the timing cover flex. Then back it off a 1/4 turn or so. I figure that is just a "smidge of clearance and whatever interference may be there will soon wear into place. Always use a smooth head bolt on the cam. |
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| Author: | Badvert65 [ Sat Jun 03, 2023 10:47 am ] |
| Post subject: | Re: Camshaft retainers |
I am very familiar with that style of cam stop. I have this idea and I will see it through, even if it doesn't work that well. What's the worst that can happen.,...... |
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| Author: | slantzilla [ Sat Jun 03, 2023 10:57 am ] |
| Post subject: | Re: Camshaft retainers |
Set your cam up and make sure it's all the way back in the block. Put a lump of clay on the bolt and cover with plastic wrap. Install cover with the gasket, then carefully remove cover. Slice clay and measure thickness. |
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| Author: | Badvert65 [ Sat Jun 03, 2023 1:01 pm ] |
| Post subject: | Re: Camshaft retainers |
Yes, that is how I measure the clearance. I am wondering what clearances OTHER people have measured. I am in the design stages of the cam button and it would help to have as much data as I can get. |
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| Author: | slantzilla [ Sat Jun 03, 2023 2:17 pm ] |
| Post subject: | Re: Camshaft retainers |
Not many do it that way. Nut and rocker adjuster is much easier. Team Green may have done a spacer at one time. |
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| Author: | CNC-Dude [ Wed Jun 07, 2023 12:54 pm ] |
| Post subject: | Re: Camshaft retainers |
The timing cover will deform in the area where the button contacts it. You'll need to reinforce it by spot welding a piece of sheetmetal on to the outside of the cover. A cam button from a GM(Buick 231) is spring loaded and can be another option.... |
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| Author: | hyper_pak [ Sun Jun 18, 2023 3:02 pm ] | ||
| Post subject: | Re: Camshaft retainers | ||
When I tear the engine down this winter I will let you know what is going on. I ran that style of button in my 11 second 440 for a few years. No problems. Oh yea, a gentleman who won Indy in a Hemi Funny car in 1969 gave me the button. Pretty sure he knew what he was doing.
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| Author: | Badvert65 [ Sun Jun 18, 2023 5:06 pm ] |
| Post subject: | Re: Camshaft retainers |
Well, just an FYI. I have these in the development stage. Cone shaped ‘button’ that fits over a 7/16” hex bolt head (5/8” wrench) It is Derlin, roughly 0.644" total height leaving it about 0.400" above the cam bolt head (the cone part). Attachment: IMG_1120w.jpg [ 70.09 KiB | Viewed 5683 times ] Attachment: IMG_1124w.jpg [ 75.38 KiB | Viewed 5683 times ] |
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| Author: | drgonzo [ Tue Jun 27, 2023 9:28 am ] |
| Post subject: | Re: Camshaft retainers |
That looks nice Matt. I like it. |
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| Author: | hyper_pak [ Tue Jun 27, 2023 10:40 am ] |
| Post subject: | Re: Camshaft retainers |
They are very nice. |
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| Author: | slantzilla [ Sat Sep 23, 2023 8:35 am ] |
| Post subject: | Re: Camshaft retainers |
Have these made it to the "For Sale" stage yet? |
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| Author: | Badvert65 [ Sat Sep 23, 2023 11:35 am ] |
| Post subject: | Re: Camshaft retainers |
Yes, they are now for sale in my eBay store, $21.65 shipped. https://www.ebay.com/itm/334940928290 |
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