MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGA - Pesky Leaks...

Hi All,

I am tackling all those small leaks in the engine bay.

I have a MGB 1.8 engine installed in my MGA Roadster and there is a discernible leak around the thermostat housing. I have sat there and watched the fluid leak from the cork gasket and it is weeping from the nuts on the studs - so travelling up the studs and through the threads of the nuts..

What can I do to fix this ?

Thank you
Aleks Stojanovic

I would think Holymar Blue will be your friend here?
No doubt someone more experienced than me can advise further.
Graham V

If it's coolant then I've found Hylomar Hylotyte Red 100 has stopped leaks the Universal blue didn't.

(scroll down page) - http://hylomar.com/hylomar-product-range/gasket-jointing-compounds/

Check that it's not your cork gasket too, I've used the Klingersil gasket a few times and find it good, it might just be a placebo effect but as I find small coolant leaks annoying I want things to work first time.
Nigel Atkins

Take off the housing, clean it all up. If the surfaces are all good, renew the gasket. Period.
If the surfaces are corroded, then do as Graham suggests.
Art Pearse

Klingersil gaskets are all I use anymore. I've never had one leak. If the thermostat housing is corroded then replace it as well. If the head surface is corroded, a very thin smear of any quality sealer should seal things up nicely. Use anti-seize compound on the thermostat stud threads inside the cylinder head to prevent corrosion. If you use sealer, be sure to get it around the base of the studs.
Steve Simmons

This thread was discussed on 23/09/2019

MG MGA index

This thread is from the archive. The Live MG MGA BBS is active now.