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Filling Late Model MGB Radiator 3.4 v6

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Filling Late Model MGB Radiator 3.4 v6 #1
cdcollins1 Doug C Kansas City, MO, USA Sign in to contact 1978 MG MGB	Topic Creator (OP) Mar 1, 2015 03:36 PM Joined 11 years ago 471 Posts

With a late model B radiator (cap is on the surge tank, not on the radiator) what's the best way to fill the cooling system and bleed the air out?

On the stock 4 cyl, there was a plug on top of the water neck that you could burp the air out of.

How have you guys with the late model radiator and the 3.4 v6 done it? I'm thinking about putting one of those flush fittings in the heater hose and using that if no one has a better solution.

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Re: Filling Late Model MGB Radiator 3.4 v6 #2
BMC Brian Mc Cullough Minneapolis, Minnesota, USA Sign in to contact 1959 Austin A40 Farina 1959 Austin-Healey Bugeye Sprite 1959 Morris Minor 1000 Pickup 1961 Austin-Healey Sprite "Green Sprite" & more	Mar 1, 2015 05:25 PM Top Contributor Joined 24 years ago 6,907 Posts

Doug,

That's what we did on our first car but if the system is sealed well, it shouldn't need much for water.

With the V6 conversion, To fill-

Remove the upper heater hose
place a small funnel on the end of the hose and top the system off
when coolant runs out of the heater core, the system is full or nearly full
Replace the hose back onto the heater core.

To insure there are no bubbles at all,
Squeeze the top radiator hose to allow any bubbles out to the expansion tank from the radiator
the expansion tank will find its own natural level which will NOT be completely full but it should not be empty either.

I should probably check the coolant in my MGB this year. I don't think i did anything last season.

-BMC.

BMC British Automobile www.bmcautos.com

Minnesota's only Fully Dedicated British Classic only shop providing Professional Restoration & Services & Specialty Products including- proper L.E.D. tail lights, Wiring looms and Engine and five speed Conversion Kits

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Re: Filling Late Model MGB Radiator 3.4 v6 #3
MGB wanna B Edward Davidson Mt. Olive, NC, USA Sign in to contact 1977 MG MGB V6 Conversion	Mar 1, 2015 05:47 PM Joined 10 years ago 2,213 Posts

that's what I did with mine, when I converted it back to the stock cooling system, with the v6.

after running it with the cap off of the overflow tank, it would bubble a little into the tank, and draw a little coolant, when cooling down.

it did it for about 2 cycles of warming it up, and, letting it cool down, and didn't do it any more, so, I figure it's full.

just waiting on the weather to come around to do some more driving, but, has performed perfectly, so far.

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Re: Filling Late Model MGB Radiator 3.4 v6 #4
cdcollins1 Doug C Kansas City, MO, USA Sign in to contact 1978 MG MGB	Topic Creator (OP) Mar 1, 2015 06:13 PM Joined 11 years ago 471 Posts

Thanks for the responses. Looking forward to getting it all together.

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Re: Filling Late Model MGB Radiator 3.4 v6 #5
joron Michel Joron Roxboro, QC, Canada Sign in to contact 1977 MG MGB "Victoria" 2018 Jaguar XE "Meghan"	Mar 1, 2015 09:10 PM Joined 10 years ago 2,989 Posts

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Filling Late Model MGB Radiator 3.4 v6

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