Info needed: Morris C8 radiator

[pauldavies]

Hi guys and yes I went for a few runs in the C8 and on the last one it blew the coolant out which was a major disappointment, I do believe it is the spring as mine isn't bound with energy and the filler funnel was pitted but I honed that but it is wearing a bit thin. Any idea of NOS for those two? My temp gauge was on normal middle setting so it wasn't over-temping in fact it only took about ten minutes for it to be ok to refill prior to going home,
Regards
Paul

[Mike K]

Originally Posted by pauldavies

Hi guys and yes I went for a few runs in the C8 and on the last one it blew the coolant out which was a major disappointment, I do believe it is the spring as mine isn't bound with energy and the filler funnel was pitted but I honed that but it is wearing a bit thin. Any idea of NOS for those two? My temp gauge was on normal middle setting so it wasn't over-temping in fact it only took about ten minutes for it to be ok to refill prior to going home,
Regards
Paul

What is the pressure level you have just before it blows ? Might be worthwhile fitting a pressure gauge on it and go for a drive . The spring might be functioning correctly and doing what it is designed to do, release pressure above a certain psi.

[pauldavies]

Will check in the morning as I looked at the needle just before it blew but it wasn't past the middle of the gauge, I was only going slow and when I got back home I let it settle before switching off. It was fine, with all this coolant on the engine it shorted the spark plugs and caused a couple of backfires. I have the original spark plug steel caps so I will get some rubber caps tomorrow as the back fires cause the exhaust to split, I have been through two exhausts so far. Will keep you posted.
Paul

[pauldavies]

Checked the temp when the rad blew and it was only 140 which isn't running temp, on these old vehicles is 160. I have stripped out the assembly and cleaned and honed everything, I reassembled and screwed the ring past the 9/16 mark then applied the sealant which worked very well on the previous go and screwed the ring back up till on the 9/16. This makes the rubber seal and funnel seal that much cleaner and sealant only on the threaded part. Will give a day to get the sealant to set then give it another go.
Spring isn't the best I feel.
Paul

[Mike K]

Originally Posted by pauldavies

Spring isn't the best I feel.
Paul

. In theory if the spring is weaker than is specified, it will release pressure before it should do i.e. at a lower psi . Yes try replacing the spring .

[pauldavies]

Yes Mike I will give the C8 another run possibly Wednesday and if no luck then I will be appealing to the MLU for new old stock spring, filler funnel and a rubber seal, I have been on ebay for some spark plug rubber caps and have repaired my exhaust box. They make these exhausts out of soft steel these days as I bent the joins with my fingers, when all is right I will replace with stainless.
Regards
Paul

[pauldavies]

Had for a run in the C8 and yes it blew out the coolant again, as soon as it started I stopped and let it cool off filled up and got home. A major setback so I am on the lookout for a new spring, filler tube and rubber seal. I have contacted Wheels & Tracks who seem the most likely but no reply yet, if anyone has these items I would be pleased to pay for them.
Paul