Bugatti Engineering - 'O' rings in the valve guides??

We took the Type 44 to Prescott at the weekend to the Bugatti garden party. A fun day and Ivan caught up with lots of old friends and acquaintances.
There was a bit of a rattle coming from the engine on the way home, which Ivan diagnosed as the 2 piece camshaft not being as tightly joined as it should be. So this week the cam box came off and John and Ivan investigated. Whilst the cam box was off they used the opportunity to implement a Shed Bodge to the exhaust valve guides, by machining internal grooves and fitting 'O' rings within them. Hopefully will stop it smoking when it starts up.
Thanks to Noel Skeats @noel_skeats_photography for some great photos. Apologies for the shaky Prescott footage (at the weekend the usual camera was still lost in the boot of the Ferrari)

[@mcashnv]

"Looks like a torture device". What a witty lady. Won't get bored with her.

[@mk1cortinatony395]

occasional innuendo too :)

[@jackpledger8118]

To be able to see the way the Bugatti engine is designed and built is extremely interesting. The previous video showing he roller bearing crankshaft assembly and disassembly was also very interesting. Just can't get enough of these content.

[@terencehawkes3933]

John makes cutting that groove look so easy. But it's not. Grinding that tool bit precisely is very very difficult. He has my deepest respect.

[@shed_racing]

We couldn't do without John

[@jesscourt9068]

And that, ladies and gentlemen, is how years of knowledge and practical emgineering, solves problems without the aid of bean counters and laptops! Fantastic insights yet again, and all done by passion.

[@brucewailes7744]

Suzy, I don't know if you intended to grow up to be a great documentary film maker, but in the instance of recording Ivan's wisdom for the ages I think you have met the mark. You are better at bringing the "Ivan Experience" to the KZbin masses than any of the previous videographers. I believe it is because you know and appreciate Ivan for the genius that he is. I think you should build brass rails around him and charge admission. Thank you for letting us see a bit of Ivan.

[@jaygee5693]

I like the way Suzy occasionally gets Ivan to clarify what it is he's talking about, when he is assuming we know something that we don't.

[@AndyRRR0791]

You can tell it's a woman behind the camera because it's pointing at Ivan's face while he's describing in intricate detail the part he's holding in his hand that all the blokes are desperate to look at...

[@lancerbiker5263]

This one truly illustrates how a lifetime of friendship and dedication can result in true craftsmanship. So well done. And kudos to Suzi for her camera work and expert interest.

[@wolfgangjurkschat]

Susi has made the Chanel even better which was already fantastic 😍 thanks, cheers from Australia

[@davidblake1663]

Suzi, thanks for keeping Ivan on the straight and narrow!

[@JamesAllmond]

That's pretty funny! Is it even possible?

[@suziepilkington5600]

@@JamesAllmond Nope absolutely impossible.....

[@mreckes9967]

Screw in valve guides? Now there's a great idea, I'm unable to count the number of times over the years that would have been soooooooo handy. Another wonderful Shed Racing video as always.

[@clivelee4279]

Am I correct in thinking that this engine has a fixed head ? An that is the reason for the screwed in valve guides, you need the extra space with them out to get the valves in and out , also when John was machining the guide , he had the clamping bolt on the Dickinson tool post outside the usual slotted nut thingy , was this to give extra hight ? Thanks for a most interesting and informative video .

[@MartsGarage]

Thanks team for showing the intricacies of the beautiful Bugatti engine. This was very interesting to watch and the interactions made it very entertaining. All the best, Mart.

[@countswing284]

Ivan's sock game on a whole different level. Well done Sir! Cheers! 😎👍🧦🏁🏁

[@tonysmith8397]

Another good one suzie. Watching ivan spinning those spanners like a youngster but with a lifetime of knowledge and skill, what a team. Mmm orange.

[@Aztec73]

The blue blue Bugatti that Mr Ivan is driving is by far my favorite That color is perfect for the car.❤️

[@Radioman1937]

Yet another enjoyable afternoon watching the dynamic duo at work. Thank you.

[@STANLIZ4]

Great stuff! Anything Bugatti always fascinating! Thank you

[@jrnmller1551]

Thanks, to the whole team, for a lovely video!

[@sagecouncil]

The ability to simply unscrew the valve guides is fantastic..Great idea with the O ring seals.. Thanks for the video.

[@shed_racing]

You're welcome!

[@rikib9132]

The old Frenchman probably just said over dinner, see I told Ivan that it didn’t need valve guides it doesn’t smoke just needed fresh oil 😅 Excellent shed engineering again 👌

[@spotontheroad1]

Many years ago I had a '63 2.5L Daimler V8 with colossal oil consumption (and lots of smoke). My local engine shop said they could cure it and cure it they did, fitting Series 1 Landrover valve guides which had internal o-ring seals just like you machined for that Bugatti. Simple but very effective. Another great video.

[@ArsenPotentier]

Loved the concert by gears on the climb also love your present "the Shocks".

[@shed_racing]

Thanks!

[@ianalderton6683]

one of the best automotive films I have ever had the pleasure to see

[@Matnrach2-mf9qr]

Proper practical engineering. Good stuff!

[@daleskidmore1685]

Suzie screams she wants to goo faster up the hill! Obviously the jump in views is because of you Ivan; the Tifosi found out you had a new Ferrari. Fascinating stuff, as always.

[@NiftyNifty-ws8rj]

For decades, Ducati have had factory fitted internal Viton o-rings in valve guides

[@shed_racing]

I didn't know that - I've only got a Ducati cucciola - and that certainly doesn't have 'O' rings

[@mauriziograndi1750]

What a superb video camera skills on one of a finest piece of automobile engineering. All done by one of a finest car technician and a superior camera arrangement with expert technical questions. I mostly enjoyed.

[@samueltaylor4989]

I hope you live forever, Ivan.

[@shed_racing]

So do I !!!!

[@unpob]

New business venture, Ivan Denton socks!

[@Lemma01]

Lovely stuff! But don't know whether to laugh or cry that a vehicle with so much attention lavished on it by experts can STILL let you down on the way to the garden party! What hope for the rest of us? 😅❤

[@suziepilkington5600]

Actually the plan is to get the car rewired after the summer - the wiring is in dire need of an overhaul - we've focussed on the mechanicals so far!

[@Broken_Yugo]

It's just part of the game with big complex machinery/vehicles, you expect problems and go looking for them after heavy work. That's what the first few trips are for. Predates the car even, e.g. "sea trials" for boats/ships.

[@A2CVMAN]

Just great again, many thanks to all the team.

[@pauldrury9695]

Thanks for such a technically perfect video! Very interesting and well produced. What a team at Shed Racing!!! Cheers, Paul.😊

[@shed_racing]

Glad you enjoyed it!

[@lkearney7299]

Thank you. Perfect detail, filming and explanation.

[@bryduhbikeguy]

What aa wonderful set of lessons on working the valvetrain into prime condition.TY. Pretty nifty looking socks to ;)

[@shed_racing]

Glad you like them!

[@markjarvis1432]

Cheeky Suzy! @13:00 mins 😂

[@paullongley1221]

I think remember the valve guides in a Leyland L12 diesel from the 1970’s/80’s had an O ring inside. Very rare though. Totally forgot until seeing your film. Very impressive engineering to do this. 😊😊

[@nigelsears7191]

Very clever modification that

[@garymalm]

It is great to hear Susie's questions. (What does a tooth out mean?) It really shows how into this she is. Thanks for your enthusiasm. gary in japan

[@AndyScutt]

Another great video ! Is there nothing Ivan doesn’t know about cars , Great guy ( And Suzie ) great video ❤❤

[@Dazsvintagestuff]

O rings in the valve guides, just like a Rover P4.

[@RonDay-ib7vd]

....and Hillman Hunters

[@RonDay-ib7vd]

....and Hillman Hunters

[@shed_racing]

didn't know that ... nothing is new is it??

[@daviddjerassi]

OMG I JUST LOVE YOU GUYS what you don't know about old engines i could put on a postage stamp two plus one equals the GENIUS TEAM OF SHED RACING LOVE THE VIDEO THANKS .

[@shed_racing]

Our pleasure!

[@erichlausch9886]

Every day Ivan sing :I'm the Bugatti man, that's what I am I'm here to do whatever I can.....Brumm..Brumm 😀

[@tommyrot7276]

Keep the boys in order Susie Collet, mechanic in waiting....

[@paulmunton1483]

You are a genius. I've watched your video's and glad to there weren't no volkswagon bugatti,s there just proper bugatti.

[@MartsGarage]

That's incredible! Amazing! I can't get my shoes on and off like that and I'm only 65!

[@shed_racing]

You can do it!

[@HQBProductions]

Another film of joy watching true engineers at work. If it doesn’t fit, is broken or there are none left, “ I’ll make a few spares just in case..” In the USA this video would be full of fake horror, tears, $100,000 bills, bad words and many WOW!!!’s …..John and Ivan just get on with it.😃😃😃😃😃

[@STANLIZ4]

Just went to buy a pair of socks and theyve sold out!! Bet they cant wait for Suzi to go again and buy something!! 😂

[@stevesalvage1089]

Brilliant idea, thanks for sharing this,

[@chrishartley1210]

I'm in full agreement about the poor availability of decent socks. However, I believe the ones that don't cut off the blood to your feet are called "comfort socks". I notice that Sainsbury sell them although I have yet to try them. Other supermarkets seem to have stopped selling them.

[@simonvancoevorden295]

Fully agree , comfort socks are readily available online .

[@shed_racing]

I reckon I will have a sock sponsor soon.....

[@stephenoliver1437]

Bugattis beauty engineering supreme

[@JohnSmith-pl2bk]

You could set the trip meter on a Datsun 120Y (B210) A12 engine when every 50,000 miles the valve stem seals would wear out..... characterised by decelerating in gear down a hill....and then the "puff" of blue smoke when accelerating at the bottom of the hill... Simple job to replace in situ using compressed air to hold the valves up...

[@shed_racing]

we did get the leakdown tester out to fill with compressed air but decided to do it the simple way

[@davidmccausland9063]

Another excellent video 😊

[@stephenhenion8304]

Who would have thought. Bugattis AND Socks.. 👍👍

[@johnspathonis1078]

Very interesting video. What grade of material is the Oring made from? Cheers

[@shed_racing]

No idea

[@ronnieboucherthecrystalcraftsm]

do you use addatives to oils and what about lok tite ! = noisey didd`s and gear boxes = 1964 mgb we used molybond = powdered graphite ! so it might help - de-friction hot spots = thanks IVAN great show ! =i have a subaru turbo forester 2001.

[@garymitchell6897]

Nice work ❤

[@Broken_Yugo]

On the whole hand filed cam thing, I think some forget that different follower types use different geometry. I think sliding fingers like that is a simple pair of parallel faces, easy enough to clean up by hand. Whereas in something like a typical post WW2 pushrod V8, the "flat tappet cam" setup most are familiar with, has a somewhat precise taper on the lobe that meets a point/circle on the slightly spherical convex lifter face so the lifter rotates instead of rubbing (this is where a wiped lobe starts) and the cam is forced back in the block against the single thrust bearing. Getting that right enough by hand would be a challenge.

[@AndyRRR0791]

Suzy's going to steal all your secrets, Ivan, and start up Automobiles Sugatti as competition!

[@shed_racing]

she won't be the first.....

[@ronnieboucherthecrystalcraftsm]

nice sox = i play guitar = i have Guitar Tee shirts shirts and sox = all similar to my guitar !

[@Dieubussy]

The 35B sock lacks a hole for the relief valve. So 35 "GP de Lyon".

[@jamest.5001]

I would like to build a few engines , from scratch. One idea is a flat 8, boxer-8. Using Chevy V8 heads , possibly crank, maybe use a flat plane crank. Custom cams. The crank case built similar to a motorcycle crankcase, acrossed with a Subaru,/VW,/Porsche. The cylinders bolt to the case. The crank bolting into the car. With bearings. And camor cams a cam for intake and one for exhaust to allow adjustments on events. LSA and such. With approx. 6.250"-6.500" with Honda or Toyota journal size, and possibly H-beam rods. 2.05"/1.65" valves and a pair of intakesthat bolt on over the valve covers with heat from the exhaust side to slightly heat the intake through a 1/2" tube with exhaust and a 1.5" pair of crossover tubes to keep a constant vacuum on each bank!. With about 4"-6" intake runners with individual throttles into large plenum 4.5x the intake runner volume. With about 68mm throttles. Three versions , one using sbc heads and crank, the second with LS heads, and third with big block chevy crank and 8.1L style heads the balance should be excellent. With 6 bolt mains using 20mm bolt. The cylinders bolting to the crank case with 8, 1/2" bolts. The heads using their bolt pattern. The mains using studs crossing the block can be tightened from either side. A cover plate, to seal the case. Then the cylinders bolt on(after the rods are bolted to the crank. Then the pistons in the cylinders. And the pins installed and cylinder bolted on. The Bell housing with multiple bolt patterns. Chevy V8 and other good transmission /bell housing patterns. With 3" to 4.5" strokes and the possibilities of 9500+ RPM. In the shorter strokes. And 7250 in the long strokes! Curious to the sound, would it sound like a traditional sbc v8? Sorry to ramble! Have a awesome day!!

[@scheusselmensch5713]

I have seen o-ringed valve guides but I can’t recall the engine I was working on. I probably would have use umbrella seals because I reckon valve guides need a bit of oil but the proof is in the pudding!

[@richardkleihorst1304]

the early landrover engine has o-rings in the valve guides.

[@shed_racing]

never had anything to do with Land Rovers, I've been very lucky.....

[@justdoi8909]

re valve guides and oil on the back of exhaust valves. My BMW R60/5, from new, would smoke from the left cylinder on start up if it had been leaned that way when parked. looked awful but never a problem.

[@mattagnew206]

My brother had an R60. I seem to recall conventional wisdom was to use the centrestand whenever possible.

[@CarlFStorey-zz9hm]

John, your toolholder was not locked into the post correctly

[@shed_racing]

You're quite right, but the tool was so small we couldn't get the height otherwise. Well spotted.

[@miked6505]

my dad used to work at burnards chuck makes in winchester

[@anthonyjackson280]

flouro-elastomer o-ring? Or more exotic ?

[@shed_racing]

much more exotic - just out of the 'O' ring stash

[@user-oj4xh8cg2l]

Brilliant ! I would wonder what type of O-ring you use (NBR 80 or 90?), the amount of initial resting pressure and how long it would last (depending on heat coming from how spirited the use)... then I suppose a properly ream guide is hard to beat to combine lubrication all along the stem and minimal play... ever considered fitting seals at the top rather (to limit engine off suction only)?

[@shed_racing]

found the 'O' rings in the junk box.....

[@user-oj4xh8cg2l]

@@shed_racing right, if you have a spare straight 8 or two in your junk box, let me know before emptying it out...

[@PaulG.x]

Using a heat gun , freeze spray and thread locking compound would eliminate the need for any bashing.

[@suziepilkington5600]

yes but Ivan likes a bit of bashing...

[@ryanrodgers1826]

wow good job boys an girls top team🤫

[@user-ov8pc2ej6p]

Great show as normal Ivan, but did I see John in the background with a frogeye sprite rear wing by any chance??

[@brucebermingham4616]

Nothing to do with me mate. I just think a lot of people have a soft spot for the 308😀

[@SubTroppo]

I watch quite a few hifi reviews so why not socks?

[@wrongwayround359]

Rover ioe engines use o rings in the valve guides also

[@philliplopez8745]

I ran out of zero's half way down the line .

[@stephencox2341]

Buy socks for diabetics, they have very little tension at the top giving a more comfortable feel and they don’t stop blood circulating properly.

[@paradiselost9946]

why an o-ring? seems far easier to run through some parts catalogs and find normal valve stem seals that will do the job, and simply turn the OD to suit... o-rings arent intended for sealing sliding shafts... especially HOT sliding shafts.

[@samstewart4807]

em orings in valve guides have never worked well. Ferrari also tried it in the 60s oh well

[@hrxy1]

Where's the bit where John as a young man is walking round the building saying, I don't like the way that's been done, as he is a bit of a builder himself, I wanna see that bit too. great vid thanks suzi

[@shed_racing]

that was the video of clips from the TV

[@hrxy1]

it may well be 25 but we haven't seen suzie's lovely legs, subtle hint.