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Welch Plugs Missing

elad_33

By elad_33,
in General Maintenance

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elad_33 Enthusiast

elad_33

Posted
Posted

Hey guys my brother was driving to work the other morning, all of a sudden bang steam/smoke everywhere, popped the hood found cooling flowing all over the top of the gearbox...Got it towed home, I had a look at it and found that the 2 welch plugs at the back of the head (on the passenger side) have fallen/rusted out.

Just wondering if anyone knows the sizes of these so I can get new ones from repco or something.

I dont have anything to measure the holes with, also had a quick search on here and couldnt find anything

Thanks for your help.

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https://www.sau.com.au/forums/topic/203212-welch-plugs-missing/
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Duncan Grand Master

Duncan

Posted
Posted

no idea how you could see those welsh plugs with the engine in? you mean rear of the engine or turbo side of the engine? much more common for it to be a dead heater hose back there.

if it is a welsh plug, is there some sort of blockage or pressure problem in your cooling system? what pressure radiator cap do you run? did it get hot?

anyway all welsh plugs are either 22mm or 30mm plugs depending on which one you are after, easy to find locally

elad_33 Enthusiast

elad_33

Posted
  • Author
Posted

Thanks for the info mate.

When we got it home I got my brother to keep pouring water into the radiator and saw it come out behind the head onto the gearbox, I stuck my hand around the back and I could feel the hole where the water was coming out (turbo side of the head)

Hopefully go get some plugs today and see what I can do, probably going to be a head off/engine out job.

Bumblebee Experienced

Bumblebee

Posted
Posted

welsh plugs are either 22mm or 30mm???

i work @ an engine reco shop... we have welsh plugs from 10mm to over 50mm.. and they are all used.

dont talk nonsense about shit u dont know. It could be ANY size. it pays to measure the hole or ask ur local engine shop.

Bumblebee Experienced

Bumblebee

Posted
Posted

Yes that is true... but its because it frustrates me how ppl with no knowledge on any subject can just give out info..

If u dont know, then dont post.. dont waste the persons time by going down a path thats not the right one.

Im sorry

GeeTR Grand Master

GeeTR

Posted
Posted (edited)

Tis what forums are about... for better or for worse :blink:

Tis up to people to spend the time, collate similar answers and make up their own minds.

...all welsh plugs are either 22mm or 30mm plugs depending on which one you are after...

Assume he means all used in RB's :)

Edited by GeeTR
Duncan Grand Master

Duncan

Posted
Posted

bumblebee, please point out to me a welsh plug on an rb motor that is not 22 or 30mm, otherwise settle down. most recent time I bolted one of these together was today and they are the only 2 sizes used, and both sizes are use at the rear of the head and block so I can't be more specific.

BTW if the leak is turbo side of the block not back of the block (no welsh plugs in the rear of the block, but there are a couple in the rear of the head), you will find it easier to see from underneath. If you take the front pipes off you might be able to see the missing plug.

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