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  1. #3331
    Join Date
    Oct 2018
    Location
    Shipston-On-Stour
    Posts
    708
    Quote Originally Posted by Darnpistonbroke View Post
    Well as I’m waiting for spares to arrive I thought it better to make sure nothing else is amiss with the carb. So today I disassembled the secondary float bowl to see what was going on. The junk that was floating around was eye watering.
    I bought the carb as a remanufactured on from Real Steel way back in 2004. I had some teething problems with it then with iron filings still present which caused me no end of problems. However she got me from the UK down to Madrid where I moved to. It was then the problems started.
    Anyway, back to the present. It seems that there is sealant where there really shouldn’t be and this has degraded over time and found it’s way under the needle valve causing the float chamber to fill itself with fuel. This lot got cleaned out today. The float itself is the solid type which I tested. No buoyancy issues there.
    So, still waiting for my parcel of bits so that I can put the thing back together.
    I haven’t done anything with the vacuum secondary mechanism yet, one thing at a time. You never know, one remedy may remedy the other problem. If it doesn’t, well, two chokes are better than no chokes. That won’t stop me from going to Silverstone. I’ll buy the parts and fit them next week.
    The book I have been using is bloody excellent! Holley Rebuilding and Modifying by Jeff Williams. ISBN 0-931472-27-X. I highly recommend it. Full of illustrations, tips on modifying. Lots of do’s and don’ts and STOP’s! if you find something specific.
    That’s all for now.
    I put a post on here a few weeks ago about crap petrol and Holley float valves. I have had issues recently and I know a few others have too. I wonder whether some of this modern petrol attacks seals and gaskets in the carb. I also had shite in mine, despite having a filter which was clean and having rebuilt them only a few years ago. One of the o ring seals had clearly partially ‘dissolved’ and gone very soft. Things do fail but this was after I filled up with ‘premium’ grade at a filling station I don’t normally use. I always try to put good stuff in (like Esso Supreme which has zero ethanol). Does make you wonder and apparently some are already selling E10.

  2. #3332
    Join Date
    Jun 2004
    Location
    Northampton
    Posts
    2,018
    Quote Originally Posted by ChrisP View Post
    I put a post on here a few weeks ago about crap petrol and Holley float valves. I have had issues recently and I know a few others have too. I wonder whether some of this modern petrol attacks seals and gaskets in the carb. I also had shite in mine, despite having a filter which was clean and having rebuilt them only a few years ago. One of the o ring seals had clearly partially ‘dissolved’ and gone very soft. Things do fail but this was after I filled up with ‘premium’ grade at a filling station I don’t normally use. I always try to put good stuff in (like Esso Supreme which has zero ethanol). Does make you wonder and apparently some are already selling E10.
    Hi Chris
    I put petrol in the tin top today so only Asda but there was a notice on the pump saying as from 1st September only E10 would be available so motorists should check if their car was compatible with it. Having said that the unleaded pump was already labelled E10 but the super unleaded E5. I don’t suppose it will have much effect on modern cars but I may be wrong but what’s the solution for our Cobras? Premium fuel? But which one? Additive?
    Dek

  3. #3333
    Join Date
    Oct 2018
    Location
    Shipston-On-Stour
    Posts
    708
    Quote Originally Posted by Dek View Post
    Hi Chris
    I put petrol in the tin top today so only Asda but there was a notice on the pump saying as from 1st September only E10 would be available so motorists should check if their car was compatible with it. Having said that the unleaded pump was already labelled E10 but the super unleaded E5. I don’t suppose it will have much effect on modern cars but I may be wrong but what’s the solution for our Cobras? Premium fuel? But which one? Additive?
    Dek
    Esso Supreme and Tesco Super have NO ethanol in them even though the pump says E5 (currently anyway!). We will need to pick carefully, I won't be using E10 in my cobra that's for sure. And yes, ethanol canceller will be going in (tetraboost 15 for me).
    Dax with 1964 Dual Quad 427 and Toploader box

  4. #3334
    Join Date
    May 2016
    Location
    Hockley ,Essex
    Age
    58
    Posts
    466
    Quote Originally Posted by ChrisP View Post
    Esso Supreme and Tesco Super have NO ethanol in them even though the pump says E5 (currently anyway!). We will need to pick carefully, I won't be using E10 in my cobra that's for sure. And yes, ethanol canceller will be going in (tetraboost 15 for me).
    For the last year I have been using Esso 99 octane petrol in conjunction with Castrol valve master for my RV8.
    Seems to be a bit better all round, performance, idle and seem to get a few more miles with normalish driving.
    With regards to "e" fuel I have seen reports from a motoring organisation that e10 could benefit the old classic
    cars due to the oxygenation in the fuel !
    This was a trick that was used to get a bit more out of your old escorts, what you did was to bubble oxygen from
    your welding set into the petrol.
    If you was competing you would be penalised for doing this if found out that is !
    I definitely will not be using e10 if I can help it, that's my view.
    Chris.

  5. #3335
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    43
    Posts
    4,908
    Quote Originally Posted by Dek View Post
    I put petrol in the tin top today so only Asda but there was a notice on the pump saying as from 1st September only E10 would be available so motorists should check if their car was compatible with it.
    I love that advice - because there are some very common cars (mid to late 2000s 2.2 petrol Vauxhall's for example) that aren't compatible, and manufacturers only had to be compatible from 2011. Presumably the advice if your car isn't compatible is "Have it turned into bean tins and buy a new one, good consumer!"

    but what’s the solution for our Cobras?
    I think we are meant to crush the polar bear killing monstrosities or replace their powerplant with an electric one (Actually, if you have £150,000 you can buy a new electric Cobra - https://www.autoexpress.co.uk/ac/cob...ctric-launched) .. seriously, though; it's only "Up to x% ethanol" so careful research to see which fuels are actually Ethanol-free (Tesco 99, Shell 99 both are, I believe) and/or an ethanol neutraliser like Chris uses..

    ..and a stock of spare carb rebuild kits!
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  6. #3336
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    43
    Posts
    4,908
    And to get back on topic for a second - what have I done on the Cobra? Nothing! I haven't been in the garage in five days, other than to get the lawnmower out or work on the other cars.. took me all weekend to do an oil change on the Range Rover thanks to some seized bolts holding the engine undertray on (which, I might add, weighs about 5Kg! It's quite the skid-plate). Still, at least I only got a little bit on the driveway and myself in the process
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  7. #3337
    Join Date
    May 2004
    Location
    Cowbridge, United Kingdom
    Age
    63
    Posts
    10,382
    After the last oil change on my Range Rover TDV8 I bought a pump.
    Got a gallon of black oil all over the drive (block paved).
    Kev Davies
    South Wales Area Rep. UKCC Membership Secretary
    DAX Mk4, 383 Chevy Stroker, Tremec. SOLD
    Contemporary CCX 3-4028, 445ci Big Block FORD FE,TKO 600, Old School IVA'd and SOLD
    Dax De Dion LS2 and T56 IVA'd June '17 SOLD
    1965 Ford Mustang 289 Convertible SOLD
    In build- Hawk 289 Sebring Awaiting IVA

  8. #3338
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    43
    Posts
    4,908
    TDV8 here too - IIRC yours is an L322? Does the oil also come out of the sump, immediately hit a chassis member at significant velocity and spray all over the place? Brilliant bit of design that! I'm thinking of a couple of these for next time (one with a right-angle adapter: https://www.quickvalve.co.uk/f106.ht...iesel)%202007-

    Received wisdom says if you don't drain via both plugs then the oil return (directly above one of them) slowly gunks up.. pretty sure it was raw crude oil coming out of mine!
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  9. #3339
    Join Date
    May 2004
    Location
    Cowbridge, United Kingdom
    Age
    63
    Posts
    10,382
    Yes L322 here.
    Yes again fabulous design where the draining oil hits a crossmember and goes everywhere.
    I did try to catch (divert it) it with a cut up plastic bottle but because there's so much oil in there you need a very big drain tin.
    Mine wasn't big enough not enough hands to change the drain tub and hold the bottle, and the rest is history.
    Hence the pump for next time.
    I will of course still do the other plug too.
    Kev Davies
    South Wales Area Rep. UKCC Membership Secretary
    DAX Mk4, 383 Chevy Stroker, Tremec. SOLD
    Contemporary CCX 3-4028, 445ci Big Block FORD FE,TKO 600, Old School IVA'd and SOLD
    Dax De Dion LS2 and T56 IVA'd June '17 SOLD
    1965 Ford Mustang 289 Convertible SOLD
    In build- Hawk 289 Sebring Awaiting IVA

  10. #3340
    Join Date
    Aug 2007
    Location
    Bournemouth
    Posts
    686
    Well the carb service kit arrived today. I call it a service kit but it’s actually an overhaul kit of which I used very few components.
    I went over what I did yesterday to. Are sure all was well and did a little more reading then out into the garage. Finished doing the cleaning of mating surfaces and reassembled the secondary float bowl complete with new needle valve and external float height adjuster gaskets. Only needing to remove it again ten minutes later! When I built the car I bought transparent plastic sight glasses for the float bowls. I decided to refit original brass ones…..I think you’ll guess what happened next!
    So the bowl came off again to remove the remains of the plastic transparent sight glasses and refitted post haste! Fortunately the primary float bowl didn’t present such dramas.
    Although against my better judgement as it could have put me off the road, (and still could) I decided to delve into the vacuum secondary bellows and see what was going on. It was removed fairly easily, the tiny incy wincy ‘e’ clip managed to not ping itself into the darkest depths of the very untidy garage which was a relief. Although I wasn’t looking forward to refitting such wee beastie later.
    The small cork vacuum gasket was discarded and some sucking and blowing took place but with no movement of the actuating arm. So off came the cover to see if the diaphragm was FUBAR. There are no splits in it but the newness has definitely worn off of it. There is a small ball bearing check valve which was stuck fast in its seat so a quick clean up of that freed it up. I reassembled the unit and gave a few more sucks and blows but nothing. So a call to Real Steel to find that all but four of their staff have COVID and delivery for spares was unlikely for Friday. However they had nil stock. So back to the drawing board.
    Off came the cover again to find that the diaphragm had somehow unseated itself from the sandwich. So a very light smear of sealant on all mating surfaces was applied before reassembly, then another quick suck and blow, (getting quite good at this. ) and some movement was the result. So at worst I will have some vac secondary working if not all. Time will tell. Bellows refitted to the carb and decided as I have new parts I should replace the primary float bowl needle valve and replace the adjuster gaskets. So I did with no dramas.
    Tomorrow I will fire her up, do the adjustments and see what happens. Then Silverstone on Saturday if all goes well.
    Last update (hopefully) tomorrow after a good clean if the car works.
    David.

    Life is driving the Cobra. The rest of the time is just waiting................till I fix it!

    Wessex region caretaker rep.

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