RogerH

Hi Ian, you have left some noughts off. At 100Mtr the airpressure is 990mB - a reduction of 0.01mB/100Mtr. It is still a lot when you consider aircraft fy at 10Km Have seen an aircraft tyre and Wheel close. These are not delicate things. oger

At British Airways I was asked to investigate an aircraft nose wheel as it kept letting the air out. I took an X-ray and was surprised to see what looked like a giant 'Aero' bar. Never seen that before Roge

I still have the coupons. Roger

E10 will do nothing in the short term. However make sure that all your rubber is up to R14 for the long term. Roger

Hi Iain, the Wanner is the RollsRoyce of grease guns. Even if it did not work it would still be better than the rest. You'll never regret having a Wanner. Roger

Hi Dave, 2.4mm 'head diameter' is very very small - do you mean shank diameter. (apprx 3/32") Roger

Hi Dave , if you were using solid rivets then the material thickness to rivet length ratio is important. Pop rivets this ratio is less important as the rivet is not truly a structural fastener. However if you look at Pete's link then you may see that the rivet length is material T + the rivet shank O/D. EG using a 3.2 diameter rivet with 4mm of material then go for a 7mm long rivet or the next size up. You don't want to use a 20mm long rivet in 4mm of material. Roger

Definitely a Renown in the rear window. - excellent car. Roger

Hi Brian, have you had a look at the Moss webCat Bezels On the Spitfire Have a look also at the TR4/4A bezels. The problem is that even within Triumph there are very many different threads/sizes used. I have made a set for my 4A and now have the taps & dies. If you can supply the sizes you need I may be able to help. Roger

Why why why go aluminium. The ONLY advantage is a slight weight saving. And unless you are racing the nuts off the car you do not need it. Aluminium does not cool as well as a decent original Copper rad. So if you need cooling why buy Aluminium. Cheap is the wrong reason to buy. Also, Why support the Chinese. Roger

....................just to do bi-coloured lines (red/white, green/blue etc) would be great to have. Roger

Hi Folks, I am coming near to the end of my TR4 rebuild. The last few days I have been driving it to get the carburation sorted but found the rear brakes seizing on. Today I spent 3 or 4 hours investigating the rear near side. What I found was was bl**dy annoying. About 5 years ago during the rebuild I replaced the near side cylinder as it was leaking (I should have just replaced the seals). A ywar later I had to replace the offside also. Today I found that the cylinder was completely seized against the back plate. For the brakes to work correctly the cylinder needs to move freely back and forth. The cause ( I suspect) is that the cylinder has a groove down each side into which the captive plates sit. This groove is too narrow. Tomorrow I shall open the groove by apprx 0.020" - hopefully the cylinder will then float into a mid position and release the brakes. Why can't repro parts work first time. Roger

Hi Paul, these boxes do get a lot of torque twisting and other forces so a raggedy hole like that isn't a good thing to have. You could drill it round and then tap it and insert a short screw. Roger

TRacking down a bad Earth - it's between Venus and Mars and possibly getting worse. Roger

Hi Dave, once you have rust coming through the Chrome you are looking at the end of the Chrome finish. The chrome particles sit on the surface of the parent metal like little islands and so moisture will easily get in and cause rust (which comes out) So, the platers put down a layer of Copper & Nickel. These are solid layers and should last many many years. However if rust appears then the Copper/Nickel has been punctured and can't be rebuilt without complete removal and re-plating. But, panic ye not!! You can remove the surface rust will stuff like DeOxC (this may be Citric or Oxalic acid based). When the surface is spotless apply a serious wax polish AND keep it polished. Roger

Some interesting comments. Here in Hayes, near Heathrow, parking outside will get the car covered in all sorts of muck and the paint will suffer. The cover shown by JagNut is very kind to the paint work. Make sure it is reasonably anchored down to reduce flapping. Being breathable, you can put it on a wet car. I have done it many times with no issues and the car is always dry when I take it off. Roger

Hi MIke, I have a cover with what looks like the same material. It is perfect for outside use - all year. Should last 3 or 4 years. Be careful it will puncture easily on sharp pointy things like aerials. If it fits the shape of your car all the better. Roger

About 5 years ago it was found that a big UK supplier had a batch of badly hardened layshafts for the TR6 gear box - not hard enough. This was brought to their attention at the time in the shop - all the stock Apprx 50 shafts) were duff. What they didn;t do was contact all the trade suppliers they had sold to and their customers - bad move !! Roll on to 2019 and the TRR PQI receive a query that a recently rebuilt GB had destroyed itself and when opened up the culprit was the soft layshaft. The GB had only run about 1000 miles. The PQI spoke to the complainants supplier and they said it wasn;t their Problem (perhaps TRading Standards would disagree) as they got it from the first big supplier. After about a month or so of lots of emails (each blaming the other) the first big supplier took the GB & OD into their workshop and rebuilt it FOC. The first big supplier went to the expense of buying a half decent hardness tester 'Rockwell C' and now check all their shafts. I'm not suggesting that the TSSC should form their own PQI (Parts Quality Initiative) - but it ain't 'arf effective. Roger

Hi Richard, if your bushes are tight and you want to borrow mine I will send it to you. I will be passing through Evesham on Friday and Sunday and will be at the TRR/TSSC/MG bash at Malvern Roger

Hi Richard, I fitted uprated (go-faster) bushes in my TR4a. Three times the price of standard bushes. It was difficult to insert the inner steering shaft. Trying to turn the wheel was a serious effort. In the end I used an expanding reamer to take off any high spots. Roger

That kit works well. You can also put the timer pot on a fly lead so that the circuit can be hidden away somewhere convenient. I wouldn't go near the 'smart screen' unit. Too many folk have said how iffy they are. Roger

Hi Dave, have you touched it with a magnet to see if it is steel. Roger

Hi Folks, Copper is odd stuff. To anneal - heat to cherry red then quench and stir in water - the more rapid the better. This is unlike Ferrous metals To harden - not usually done as after it is annealed and then worked upon it will harden (it is called 'Work hardening') Be careful once work hardening has set in the copper may well crack if you try to work it more. Re-anneal if necessary. Hi Dave - I can't visualise what you have is it like the pic below 4th line down. Are you sure it is copper or brass - if so it will solder easily and will no further heat treatment. The pic below looks like steel but I'm not sure. If it is steel then this could easily be soldered of silver soldered (a little stronger) https://www.google.com/search?source=univ&tbm=isch&q=Triumph+Vitesse+petrol+cap&sa=X&ved=2ahUKEwjyod2-5fPxAhXaQUEAHQB1AQsQjJkEegQIDBAC&biw=1517&bih=730#imgrc=ig81RlkNyCsvbM Roger

Mine were also tight - honest. Roger

You MUST retain the valves somehow. I have a repro AC pump on my TR4A and after quite a few miles a valve dropped out - the car stopped. Easy enough to pop back in but it came out again after only a 1000 miles or so. I resorted to fitting a plate over the valves held in with an M3 screw, The push fit will not withstand the continuous vibration. Roger