Just developed a significant leak coming from a freeze plug right over the starter.  Would this be considered a "cam plug" i.e. like Dorman 17616DS?  Our cars have multiple sizes of plugs on engine block and I want to get the right one.  Also, does anyone know how pricey this is for a shop to fix?  Thanks!

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Comment by Lee Martin on March 23, 2021 at 9:46am

Thanks Jason, very helpful - I will pick some up.  Amazing that everywhere I went these were listed as "out of stock" or "discontinued."  Guess everyone who wanted them got them and that's it...

Comment by Jason Edge on March 22, 2021 at 6:36pm

I did a quick google and see the Dorman 550-021 (concave steel 1 31/64) and found them here at Jegs - https://www.jegs.com/i/Dorman-Products/326/550-021/10002/-1#

You can also use the rubber compression ones. From my notes and the CLC article the part number for that one is Dorman 570-006.

Comment by Lee Martin on March 22, 2021 at 4:52pm

Great.  Sadly no one carries the 1.484 size, so doesn't change anything for me.  Onward and upward...

Comment by Jason Edge on March 22, 2021 at 4:31pm

63 and 64 camshaft plugs are the same - 2 6/64”

63 and 64 freeze plugs are the same - 1 31/64”

Comment by Lee Martin on March 22, 2021 at 4:24pm

Thanks guys, this is very helpful.  I've been online and on the phone all afternoon looking for these, nobody has them.  The '64 sizes are available over the counter at AutoZone, but good luck finding the '63s...

Comment by Jason Edge on March 22, 2021 at 3:36pm

The camshaft plugs are 2 7/64", There is only one of these at the rear of the engine behind the cam.
The freeze plugs, 6 in the block and 2 in each cylinder head were 1 31/64". 

Comment by Tony and Ginny 429 on March 22, 2021 at 1:46pm


The freeze plugs and the cam plug are two different plugs and possibly  different sizes 

Sure one of the boys will be along to help you with the size of the freeze plug you need and are looking for 



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