air lock

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Discussion

Aussie John

Original Poster:

1,021 posts

238 months

Sunday 17th January 2021
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i end up with an air lock in the radiator at the bleed bolt side, it occurs regularly but it doesn't use any coolant, any thoughts guys? The bleed bolt has a copper washer and plumbers tape so hopefully not sucking air on cool-down.

lancepar

1,041 posts

179 months

Sunday 17th January 2021
quotequote all
I thought I would just add this idea because I can't help with your issue.scratchchin

One of the days I'm going to see if this will fit in place of the fiddly plug you can't see where it fits because it's tucked up in the nose of the Griff' to get it started without cross threading it when bleeding the Rad' and spilling coolant everywhere. Grrr

BTW my bleed plug is metal, I've read somewhere they could be plastic.

Once installed a temporary pipe could be fed back to the overflow or swirl pot to collect the fluid when the tap was being used.



https://tinyurl.com/y4rlcr36
or if that link didn't work....
https://www.ebay.co.uk/itm/Land-Rover-Series-2a-3-...
Gone up in price a tad since I bought mine, didn't think I'd had it that long!!!!!!!!

I took it down Central TVR and we tried it in a radiator for fit and decided with some PTFE tape it would do the job because the threads were not a perfect match but near enough I recall.

cool

Aussie John

Original Poster:

1,021 posts

238 months

Monday 18th January 2021
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Good thinking Lance, I was tempted to drill the bolt and put a smaller version of your option in, I feel your frustration, I dropped the bolt while trying to screw it in, lots of coolant everywhere and lots of swearwords too.

lancepar

1,041 posts

179 months

Monday 18th January 2021
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Hi John,
Your car being a '94, would I assume have an Overflow Tank connected to the Swirl Pot. The swirl pot with this system should be full of coolant so when hot expands and escapes to the overflow tank which should be half filled when cold.
When things cool down coolant is then sucked back into the swirl pot. I'd check the pipe between the S/P and the O/T.

On my early Griff' there's no O/T so the S/P is not filled to the brim, and if over filled burps out the hot excess coolant which runs down and dries on the shinny polished S/P. vomit

After it finds it level it's all good apart for having to get the polish out.

cool

Aussie John

Original Poster:

1,021 posts

238 months

Tuesday 19th January 2021
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Hi Lance, mine just has the swirl pot so the same as yours but thanks for the thoughts; its an irritating problem on mine, when the fans come on the fan on the n/s blows hot air while the o/s blows luke-warm, that's when its bleed time.

Mr.Grooler

1,183 posts

232 months

Tuesday 19th January 2021
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My 1994 pre-serp is the same; over time it builds up a bit of air in the top of the radiator. Not a large amount so I just bleed it out from time to time. There must be a suitable point on the circuit to bleed back to with a small pipe, but haven’t put much though to it yet (although it’s been on the jobs list for a few years!)

No expansion tank on mine (just the big pot), and no coolant leaks that I’m aware of. I’ve taken the thermostat out of the engine and fitted a pressure relief stat in the bottom hose, standard circuit otherwise. Works very well apart from air in the rad!

lancepar

1,041 posts

179 months

Tuesday 19th January 2021
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Somewhere on PH and probably the Griff' forum I've seen a photo of the Griff' and radiator with the top hose near the inlet fitted with a bleed valve in it.
Can't for the life of me find it again or remember the name of the maker.biglaugh

Anybody help?

cool