one for the colective

[gordon stephenson]

I have known people just use a smear of paint without problems,

 

[Windy Miller]

I’ve done them with a good clean up and a little smear of gasket sealer, and once or twice with just a little grease. Never had one leak yet...

 

[brightspark]

probably go for the hylomar. anyone remember golden hermetite its very similar stuff .don't know if u can still get it

 

[Wallace]

probably go for the hylomar. anyone remember golden hermetite its very similar stuff .don't know if u can still get it

I remember it as a kid! They did a spray can version and the advertising showed a golden head gasket if my fading memory serves me correctly. Good stuff similar to Hylomar.

 

[Ali]

I have known people just use a smear of paint without problems,

I’ve got some Glyptal somewhere I used to paint internal parts, that would do the trick

 

[gordon stephenson]

I may just have an old tin of Hermatitem Will probably be rock solid by now, Loved the smell of it,

 

[Cobbler]

I may just have an old tin of Hermatitem Will probably be rock solid by now, Loved the smell of it,

I used to hate the old Hermaphrodite (Hermatite) red stuff, gets everywhere. You used to see it dripping from joints where people thought it cured everything. We always knew it as Hermaphrodite

 

[Stueeee]

In the good old simple days they were convex, Then they got fancy and changed to the dished type, Not as good in my opinion.And they are made from thinner metal,

Money, money, money. The holes for the modern dished type are cheaper to machine. The domed style require an undercut in a stepped hole. Working on a lot of early vintage stuff it's not unusual to need to machine a corroded core plug hole up to a larger size in order to get a decent seating for a larger plug.

 

[reb78]

I used Hylomar Blue on the plugs on the Discovery. They are threaded on the TD5 though so I dont know if that makes a difference.

 

[The_Yellow_Ardvark]

I used Hylomar Blue on the plugs on the Discovery. They are threaded on the TD5 though so I dont know if that makes a difference.

Yes.
You can't hammer them in.

 

[reb78]

Yes.
You can't hammer them in.

Haha. I meant a difference to the sealant used!

 

[zzr1200]

probably go for the hylomar. anyone remember golden hermetite its very similar stuff .don't know if u can still get it

The best gasket sealer ever was Green Hermetite. Set like concrete it would never leak if surfaces where clean

 

[brightspark]

I used to hate the old Hermaphrodite (Hermatite) red stuff, gets everywhere. You used to see it dripping from joints where people thought it cured everything. We always knew it as Hermaphrodite

hug me tight

 

[8ob]

On any performance blocks I just tap the core plug holes and screw in plugs, same for the oilways.

Bob

 

[cr500dom]

On pinto engines in FF2000 we used to drill and tap 3 holes 10-32 around the edge of the core plug, close enough that a washer would just overlap the edge of the installed core plug.
3x 10-32 cap heads, drilled and lock wired, stopped the core plugs walking out.
As the engine had the transaxle and Suspension hanging off the back it was a semi stressed member, and we did have core plugs walk out over time.
Once we went belt and braces with the lock wired bolts it never happened again.

 

[gordon stephenson]

Only ever known two core plugs blow out (old type) First one was my dads Humber, No big deal, he pulled up and stuffed some rag in the hole and drove home. Second time was a "bit" more dramatic, I was showing off giving one of my mates a ride in my XK 120, Blasting along at stupid speed, The tiny roadster cab suddenly filled with steam, couldn't see a thing,Jumped on the brakes, Good job I was on a good straight road and stopped OK, New trousers required!!!

 

[Stueeee]

On pinto engines in FF2000 we used to drill and tap 3 holes 10-32 around the edge of the core plug, close enough that a washer would just overlap the edge of the installed core plug.
3x 10-32 cap heads, drilled and lock wired, stopped the core plugs walking out.
As the engine had the transaxle and Suspension hanging off the back it was a semi stressed member, and we did have core plugs walk out over time.
Once we went belt and braces with the lock wired bolts it never happened again.

Need to do the something similar on a lot of high revving motors with the domed (Welch) style plugs even when they're not acting as a stressed member. I spotface the edge of the coreplug hole boss and fit screws and stainless washers that overlap the edge of the core plug. Just visible in these two photos.