Holden 202 Valve Stem Guide Seat Cutting For Viton Seals

This will show you how to cut Holden 202 valve stem guide seats to fit modern day seals.
Head valves are typically of 11/32" in size, so this may be the arbor you'll want. Common cutter tool size is 0.530". Make sure you get a set of vrenier calipers and do your measurements before proceeding. Advantages of having this mod done is longevity of the valve stem rubbers, which will mean your engine isn't likely to burn excessive oil and foul up plugs etc, through too much oil bypassing through the valve stem guides.

[@oscarpuente2029]

outstanding! I'm purchasing the same cutting tool and arbor, next month. do it yourself.👍

[@MrPropanePete]

What a clever modification, just came across this video. I worked on a lot of Holden Red (and grey) motors in the 60's and early 70's and always thought the valve stem oil seals were too minimal. They hardly do anything but there was no alternative in those days.

[@bigal878]

Great video mate and very informative 👍🏻

[@reapermansoldholdensixmech8675]

Thanks mate :)

[@zdravkomomci7570]

Thanks for sharing I'm in the process of refreshing a motor and do have a drill press your video came in handy, my brother lives down your way little town Perth he tells me always some things you can't get like you get in Melbourne down there cheers

[@reapermansoldholdensixmech8675]

Ah yes, Perth. Perth is about 30mins north of where I am living now. And we don't have good access to engine machinists anymore here. Right now, if a motor needs a bore out, it's cheaper to get it done interstate and sent down, and prob be at a better quality finish also

[@glynshakeshaft1970]

great video, really helped me out, thanks

[@reapermansoldholdensixmech8675]

You're welcome. I am glad it was of assistance to you

[@DeliriumElectric]

Great idea! Thanks

[@deanwitt7903]

Awesome video .

[@reapermansoldholdensixmech8675]

Thanks mate! :) Also found that you can get umbrella seals from f*rd 351 motors that'll fit these 11/32 valves and even those are still superior to the traditional black rubber band seals that tend to be rather sensitive.

[@davidhole8229]

Does this reduce the valve guide height to? Just wondering if this mod will help my clearance with a high lift cam on a 173 head,,, realise this vid is old but I can only ask, cheers

[@reapermansoldholdensixmech8675]

yes, this tool can and will allow you to cut down the top of the valve stem guide enough for you to easily run a high lift cam. I've done this with a .550thou cam no worries.

[@davidhole8229]

@@reapermansoldholdensixmech8675 solid mate!!! Appreciate that info

[@reapermansoldholdensixmech8675]

@@davidhole8229 You're most welcome. No dramas.

[@matthewtassone7588]

Awesome work mate! Where abouts do you get the tool head from and what specs?

[@reapermansoldholdenmechani8836]

Thanks mate! :) Comp cams make the arbor/guides and the cutter tool. Arbor size is 11/32, part number 4732. and the cutter is to cut seats to 0.530, and can be purchased from here: www.compcams.com/valve-guide-cutter-530-for-standard-ptfe-seals.html. Viton valve stem seals can be bought from many places, but I'd bought a set of v8 ones from ebay that did the job rather nicely. A lot cheaper than buying a set to suit the holden six, and have some spares to go with it.

[@jimclarke1108]

308/253 exactly the same

[@RolandElliottFirstG]

Great, the seals will last possibly 400 thousand K or more.

[@reapermansoldholdensixmech8675]

that was my thoughts exactly! Was so tired of the factory rubber band seals not lasting.

[@reapermansoldholdensixmech8675]

Please do use a drill press to do this and also make a jib frame for the head to the valve stem guide hole is dead vertical. comp cams etc state you can do this by hand with a drill, but I did test that method on another and found that the seals of the standard diameter I was using for the valve seat were too loose. Had since cut that head sat guides the next size down on a jib frame and worked out just fine. My next challenge when I can afford it will be come up with the cash to purchase valve stem guide replacement tools and show how that is done.