Blanking plug hex size?

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rswaffie
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#1 Blanking plug hex size?

Post by rswaffie » Fri Jul 31, 2020 4:58 pm

Hi all,
I’m tracking down the oil and fluid leaks as I run in my rebuilt 3.8 engine. There appears to be a slight coolant leak from a blanking plug on the right hand side of the block. I believe this is a heater element blanking plug and it looks like a male hex type bit is needed to tighten it up. Does anyone know the size/type of bit needed?
Richard

S1 3.8 FHC Opalescent Golden Sand with Tan Trim 889504
Now running-in my diy nut ‘n’ bolt restoration. :wrench: :hammer: :fingerscrossed:

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mgcjag
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#2 Re: Blanking plug hex size?

Post by mgcjag » Fri Jul 31, 2020 5:31 pm

Hi Richard...was this removed dureing your rebuild....if not then i wouldnt try to remove it now....a bottle of bars leaks would sort it.......as for the hex size just measuee across the flats...its not going to be metric :bigrin: ..Steve
Steve
1969 S2 2+2 & Building a C type replica

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christopher storey
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#3 Re: Blanking plug hex size?

Post by christopher storey » Fri Jul 31, 2020 6:14 pm

I couldn't agree more with Steve. These plugs are well nigh impossible to remove unless you had it out during the rebuild, and even then it is in one hell of a place to get at. Bars Leaks, 2 bottles, was the standard Jaguar prescription for all new cars !

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rswaffie
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#4 Re: Blanking plug hex size?

Post by rswaffie » Fri Jul 31, 2020 7:13 pm

Looking at the pics from the rebuild, all the core plugs were replaced but the heater plug was in situ.
Bars leaks it is then.
Richard

S1 3.8 FHC Opalescent Golden Sand with Tan Trim 889504
Now running-in my diy nut ‘n’ bolt restoration. :wrench: :hammer: :fingerscrossed:

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steve3.8
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#5 Re: Blanking plug hex size?

Post by steve3.8 » Fri Jul 31, 2020 7:43 pm

I took the large heater plug out a couple of weeks ago before the block went for machining , it did not want to budge even with a 3ft extension tube. Resorted to using plenty of heat from my trusty superfire2 with mapp gas.
With the engine in situ Richard you are doing the right thing as Christopher and steve suggested.

Its a tapered bsp brass plug with a 5/8" hex socket and quite easy to round off the hex in brass.
Steve3.8

64 3.8 fhc, 67 4.2 fhc

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