Core plug,What's the best way to remove

[Stagdad]

I want to remove 2 core plugs,one in each head between the 2 pairs of inlets.they look like they are pretty solid so any tips on how to remove them.Engine is out of the car.

Cheers Steve

[singapore stag]

http://www.youtube.com/watch?v=Cru1X9hbZ20 ,.....Perhaps?

[KOY 23]

I used to bash a screwdriver through the plug and lever it out.

[martin]

Hi Steve, out of curimosity, if they're solid, why take them out ? Martin.

[mjheathcote]

I used to bash a screwdriver through the plug and lever it out.

The bigger the screwdriver, and heavier the hammer the better!

[Kevin Garrod]

Hi Steve, out of curimosity, if they're solid, why take them out ? Martin.

Martin, I think this is to do with Steve's EFI project,he intends to use the core plug holes to re route the coolant.

[Stagdad]

Martin, I think this is to do with Steve's EFI project,he intends to use the core plug holes to re route the coolant.

That's right ,I have seen this done and as the centre core plug and the manifold slot are close together can't see a problem with using the core plug hole and blanking the PITA that is the slot in the manifold.just need to check that they are in the same gallery which will be easy when I have removed the plug.TR7's use the front core plug hole as an exit although they have a different flow layout Cheers Steve

[alan_thomas]

Steve, I tried a couple of ways before getting them out. First I drilled a hole and hooked my slide hammer in and no joy couldn't move them a thou. then I used a big old screwdriver and punched inwards hard on one side. the core plug pivoted around, half went in, half came out. It was then easy to remove it.

You are right about the TR7 the water flow is out of the block at the rear and drawn forward and out where the stag front core plug is. Stag is opposite out of the block at the front and drawn back to the rear and mostly out thru the slots under the rear inlets.

The core plugs are about 28mm dia which is same area as manifold slots but personally I would want to encourage some coolant rearwards of the centre core plug as if you look at a new gasket there is only a tiny coolant hole on the rearmost cylinder. Allowing some coolant to always exit via both rear transfer housings would do the job. - Alan

[Stagdad]

Steve, I tried a couple of ways before getting them out. First I drilled a hole and hooked my slide hammer in and no joy couldn't move them a thou. then I used a big old screwdriver and punched inwards hard on one side. the core plug pivoted around, half went in, half came out. It was then easy to remove it.

You are right about the TR7 the water flow is out of the block at the rear and drawn forward and out where the stag front core plug is. Stag is opposite out of the block at the front and drawn back to the rear and mostly out thru the slots under the rear inlets.

The core plugs are about 28mm dia which is same area as manifold slots but personally I would want to encourage some coolant rearwards of the centre core plug as if you look at a new gasket there is only a tiny coolant hole on the rearmost cylinder. Allowing some coolant to always exit via both rear transfer housings would do the job. - Alan

Thats the plan Alan,4 outlets ,2 x 1/2" bsp hosetails out of the transfer housings and 2 x turned inserts with "O" rings to fit in the coreplug holes giving an internal 18mm hole.This will give about the same area of escape for the coolant as the slots in the inlet manifold which is considerably bigger than the most restrictive part which is the thermostat.

Cheers Steve

[mjheathcote]

Don't forget the front inlet manifold exits too! Okay they are only small but there for a reason, if only to bleed air. Cheers, Mike

[Stagdad]

Don't forget the front inlet manifold exits too! Okay they are only small but there for a reason, if only to bleed air. Cheers, Mike

All taken care of Mike

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