The non-return valves look like a good idea. But there is a danger of it sounding like a team of horses galloping round the track with those plates Ivan!

❤brilliant ❤

You asked for it: "O, yeah. Moto Guzzi oil catch tanks have the valve." 😉 This valve is in the rocker box breathers only. The return pipe, from catch tank back to the sump is not valved. When the valve stops working, the engine throws it's oil out. I.e. It works....

"Bit of fun trying it" That's what keeps the nation's men in sheds from going insane.

I’d probably use a reed valve block from a big two stroke motorbike. Less likely to come to bits and silent as well.

20:50 What an awesome thing for these two guys to share their passion across generations. Great to see 👍

yet another experience at Ivan's place and Prescott. Great stuff

I tried to send you an email as you requested today but your www. email is not working for my gmail account. Is there another email to use? Still love all your videos and keep them coming!

How you only have 24ksubscribers is beyond me, best entertainment on KZbin 👍

Again brilliant stuff, thanks team.

🇨🇦 It's called a PCV valve over here in the America's, Positive Crankcase Ventilation valve. They were introduced in the early 60's and replaced the "Road Tube" a baffled breather tube that exited below the car. 🇨🇦

One way valves in breathers work well on classic British bikes. I've had one on my Norton for many years,

Early three wheeler Morgans had either no front brakes or weak ones. The reason for this was because a number of three wheelers were involved in accidents where the car flipped over. A number of drivers were killed or seriously injured. They solved the problem by putting the engine further forward. The extended front chassis would drag on the road, stopping the vehicle from flipping over. Really enjoy your films and rebuilding items. Graham Priest.Gpx

My favourite utuber 😊

This episode is a knockout! It's got it all!

Thank you for the tech problem solving and all of the Prescott footage!

Nice bit of engineering on the new breather concept from all involved, it has given me some ideas for my old motorbikes! You continue to inspire me Ivan! Well done and a very interesting and jovial episode. Thanks, Paul 🤓

It’s a nice pcv valve 🙂

At 16:39 I am literally your follower😁. It was an excellent day's motorsport.

Fabulous content as ever, I knew very little about vintage sports cars, found the Shed Racing channel, I’m now hooked. It was a pleasure to meet Ivan and Suzie at Prescott, lovely friendly folk with time for everyone, super to see. And great to see my video clip of Ivan burning up the hill. Thanks for the tee shirt and the stickers, already in pride of place in my shed !

never had a red flag before? 16:28 "I find that hard to believe..."🤣

Excellent, as always !

"getting old is a bloody nuisance" - priceless 🙂

The Hall & Scott is definitely a "work in progress" vehicle but development takes more than a few steps Ivan, keep powering on.

I can't get enough of these videos. Susie, who ever is in the driving seat, you, and only you, know the way to Ivan's heart. What a team, the presentation is first class, well done everyone.

I love the pure fluke of the visual effect of oil being sucked into engine. Reminds me of my Dad setting is car timming, he always listened for the interference on the Tranny radio caused by the spark has points just opened. Brilliant program and fixes.

Amazing man😮😮😊 great video😊😊

Great idea, well executed as usual. That Morgan is a sweetie.

That engine sounds like 2 skeletons making love in a tin bath

Then you jiggle this bit and tickle that , release the dogs and you're off to the races ! TT FN !

Only Ivan could include a video of a blue glove madly waving, classic 😂

A very Large PCV valve

Every time you make a video you bring me pure happiness im grinning from ear to ear Thank you all Team Shed Racing for a great Prescott in good weather love the racing overalls Ivan WHAT A BLAST.

It’s great to see young chaps like that Morgan owner, preserving the old stuff! That car is safe now.

Another wonderful entertaining video! Is there more to the story of your new friend with the purple hair!??? Cheers from Alberta Canada!

BRILLIANT.

I have the same problems with my sump too.... i blow the gaskets all the time!!!

"Will that fit in the van with that?" Why do women always come up with these awkward questions. My wife does this all the time Women's intuitions, possibly. What would we without them? 😂

A PCV valve with diaphragm was fitted to the breather tube above the oil vapour separator from the crankcase....on a 1969 Wolseley 1300...with the coir filter in the oil filler cap providing the inward air. Always kept the "mayonnaise" out of the valve cover with a one way air flow through the engine.....

Splendid episode, Ivan. Thoroughly enjoyed this one! Best regards from Missouri, USA.

Another fantastic video, I know little about the mechanics of an aero engine,but it is so interesting watching your posts. Keep the channel going, Graham.

Your breather with the one way valve is just like that fitted to the pre-war two cylinder Aeronca Jap. It works a treat.

Multi cylinder engines normally balance out their crankcase pulses, except for ring blow-by. Single cylinder and boxer twin engines like BMW mc & 2CV have the worst case breathing. IMO reed valves work best, with your design ideal is very light valve flapper and very light spring required. The 70up BMW mc came with breather very similar to your design, it used a light phenolic (micarta) disc, this improved later with reed valve. Possibly another problem with HS is air sucked into engine by incomplete sealing. For example when F1 first discovered the importance of negative crankcase pressure, they used bigger scavenge pumps to achieve it, but then had to reverse the oil seals to prevent atmospheric air from entering crankcase. Keep up the great work!

Ivan,have you thought of a non metalic breather valve? A metal one would give you a noise when working.

I find that hard to believe too.

👍🇦🇺

Hey up mate nice work and a good video thanks

Fantastic! I'd never be able to go up the hill in my Model T speedster... When it stops flinging out oil it means I don't have any! Cheers from my shed

You may want to study the crankcase breathers used on Offenhausers. They also suffer from high pressure in the crankcase due to the dimensions of the barrel design.

Brilliant plan and execution of the idea. Thank you for yet another great video. Glad you had a good day at the track,(No rain) and got to test the new parts set-up.