Can anyone please advise what the thread is on the coolant bleed banjo bolt?
My radiator bleed has been bodged by a previous owner (one of many) & I would like to make it right. The hole where the banjo bolt should be has been plugged. I should be able to get one locally if I knew what the thread is supposed to be. I don't want to wreck what's left of the thread by forcing the wrong size in there. Car is a late pre HE. Thank you. Scott.

 

From memory it is 3/8 NF.

I would get a NF thread tap, so you can clean up the radiator threads easily, and then there will be no chance of further damage to the actual radiator.

 

Thanks Grant. I didn't think that it may have been UNF. I assumed that it would have been some pipe thread, especially as the air bleed nipple ( where there should be one....mine doesn't currently) and the drain petcock are 1/4 BSP.
These cars are such an eclectic mix of thread types that it doesn't make restoration jobs easy.
Have you sourced any replacement banjo bolts yourself? If so can you recommend anyone in Adelaide?
Thank you.

 

FYI, on my car at least, the air bleed plug (opposite side to the banjo on the rad top) is the same thread size as the banjo.

Greg

 

Fun is always had.

I made my own for the oil banjo a very long time go, when the eyes were way better than now.

Give Geoff at Soveriegns a ring, he may have one. Failing that talk to Fred (NO ONE ELSE) at City Dismantlers, and tell him I suggested he could help.

Down south, maybe Triumph/Rover spares at Lonsdale.

I dont have one, or you could have it.

The bolt suppliers wont have banjo bolts that I know of, as they are specific to engine applications.

The part number for the HE banjo bolt is C440853, but that is longer than the PreHE. The HE has a spacer in that stack, and the PreHE has no spacer.

 

Grant and Greg, thank you both for taking the time to help. My radiator definitely has 2 different sized ports. The small one is 1/4 BSP & where the air bleed nipple should be. The larger one on the (Aussie) driver's side confirmed to be 1/2" UNF, thanks Grant.
I'm struggling to find a non Jaguar supplier that has the correct type of banjo fitting, so a call to Geoff at Sovereign or your mate Fred is the next step. I won't deal with TRS. Another bodge on the way to being undone.

 

That has the memory firing a tad.

Our PreHE had 1/4BSP on the bleed, LH side, and the banjo on the RH side.

The HE went to a non-tapered plug on the LH side, as Greg said.

 

Loads of 1/2 UNF banjos on UK ebay. Also your local Massey Ferguson tractor dealer may stock them!

Greg

 

any shop that rebuilds fuel injector pump will have them even the ones that are used on large trucks will have them good luck