My recent purchase

[Rubbond]

My ignorance no doubt but I've never heard of a core plug? The name suggests
it may be to release the sand after the block has been cast. Or maybe a
design feature to prevent the block from cracking if the coolant were to
freeze? Or to assist with flushing the engine?
But in any case, the radiator cap cannot really fail. It's just a
spring-loaded seal that would leak, rather than get stuck. And surely the
radiator core would be the next thing to burst, or the coolant hoses if
cracked.
I have on many occasions had problems with engines overheating (come to
think of it most recently with a vintage outboard engine). It was always the
thermostat, or in the case of the outboard, blocked water channels, but the
steam always came out of the radiator cap. If these cores "pop out" at less
than 15 psi, then might they not just drop out going over a speed bump?
Andrew.

[caspian pugh]

Originally Posted by Rubbond

My ignorance no doubt but I've never heard of a core plug? .

Even my Willie has heard of a core plug - you have a problem.

I have spoken to Butch our mechanic, he tells me that core plugs often rust but electrolytic corrosion between the edge and the block can cause them to loosen and pop with cooling system content pressurisation.

As Greg confirms, Mini core plugs in steel will fit most Chrysler V8 but the best replacements are brass core plugs from the States fitted with a little RTV sealant (non acetic acid cure) around the edge.

Hope this helps,

Cass.

[Sam410]

I'm not sure about the 408, but the 410's expansion tank is under the bonnet slam panel, between the grille and the radiator. Easy to assume there isn't one!

[pasini s]

Hello,


here's where the expansion tank of my 409 is:

http://www.stefanopasini.it/Bristol_...nsion_Tank.htm

Of course I don't know if this applies to a 408 as well....

Cheers

Stefano

[classicgreendog]

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CURRENT MESSAGE FROM: pasini s

Hello,


here's where the expansion tank of my 409 is:

http://www.stefanopasini.it/Bristol_...nsion_Tank.htm

Of course I don't know if this applies to a 408 as well....

Cheers

Stefano



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PREVIOUS MESSAGE FROM: classicgreendog

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CURRENT MESSAGE FROM: Sam410

I'm not sure about the 408, but the 410's expansion tank is under the bonnet slam panel, between the grille and the radiator.. Easy to assume there isn't one!



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PREVIOUS MESSAGE FROM: caspian pugh


---Quote (Originally by Rubbond)---
My ignorance no doubt but I've never heard of a core plug? .
---End Quote---
Even my Willie has heard of a core plug - you have a problem.

I have spoken to Butch our mechanic, he tells me that core plugs often rust but electrolytic corrosion between the edge and the block can cause them to loosen and pop with cooling system content pressurisation.

As Greg confirms, Mini core plugs in steel will fit most Chrysler V8 but the best replacements are brass core plugs from the States fitted with a little RTV sealant (non acetic acid cure) around the edge.

Hope this helps,

Cass.

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