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SOME ENGINE TROUBLES.

16th January 1923
Page 29
Page 29, 16th January 1923 — SOME ENGINE TROUBLES.
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Interesting Contributions from our Driver and Mechanic Readers.

ENGINE TROUBLES are rarely of great consequence, being generally in connection with trivialities. They still, however, call for the exercise of considerable ingenuity in their elimination, or solution, according to circumstances. Take the case of a correspondent from Carlisle, for example (he has forgotten to sign his name to his letter), who is driving a Ford. The boss which is provided on the cylinder head for the reception of the bolts which secure the outlet water pipe broke off, so that the joint could not hold. The van could not. be spared long enough to enable a weld to be effected, so that something had. to be contrived quickly, and on the spot, to enable the van to " carry on.'' The solution proved to be simple, ingenious, and most effective, and it is on that account that. we have awarded him the 15s. prize this week.

Be simply procured a bolt, of suitable length, and cut off the head. He then flattened out the shank, and drilled it so that it would accommodate one of the bolts which hold the cylinder head down. Placing this "eye-bolt " on the foremost cylinder-head bolt, on the same side as the broken boss, and putting the shank of the bolt through the hole in the flange of the pipe, he was able to tighten the joint.

The experience of " M.M.," of London, W., which arises out of a trait which, he says, is common to all Selden engines, may be of interest to drivers of that make of lorry. Perhaps some of them may write to us and Pet us know if they are in agreement with this correspondent as to the frequency of the

occurrence of the trouble in question.

He says that for some time he WAS troubled with a knock on these engines, for which he could not discover the cause. The usual sources of trouble of this nature were examined, and, where it, was deemed necessary, the orthodox means of effecting improvement, were carried out, but without success. On one occasion, however, and quite by accident, lie noticed that the noise appeared to come from the neighbourhood of the magnetodriving gear, and on further examination he discovered that there was a small amount of play between the magneto coupling and a, neighbouring bush. Hardly thinking that this could really be the cause of the knock, but nevertheless determined to leave no stone unturned in his search for the source of the trouble, "MM." made a new bush with a

slightly thicker collar, so that the play was taken up. The knock disappeared, and has not reappeared. A simple way of effecting " upper" lubrication of the engine cylinder and pistons is described by another correspondent, concerning whose name and address we are without any information. Take, he advisee, a piece of iein. copper pipe ; secure one end to the pressure release valve outlet (on the lubrication system of the engine), and lead the other end to the air intake of the carburetter. The result is that a certain amount of lubricant enters the cylinders with the gases, lubricates the valve guides, valve stems, cylinder walls, and pistons. It also prevents the top ring of the piston from sticking, and still has no tendency, by gumming up, to make starting difficult. Sufficient oil does not pass to make the plug oily, and, finally, the lubricant has not to 'traverse the carburetter jet. " H.H.," of Highgate, sends a neat sketch of a simple and efficient hose clip. The sketch is almost self-explanatory. The wire may be either copper or iron, Incidentally heqmints out that when trouble is experienced with hose clips it is not, as a rule, due to any fault in the clip itself, but is generally due to the fact. that a wrong size of hose has been selected. Usually it is too slack on the pipe, in which case no amount of

tightening with a clip will make it entirely leak-proof. The best thing to do in such circumstances, he says, is to wind a little insulating tape round the pipe, until the hose is a good fit. It will usually go over the tape quite comfortably with the aid of a, smear of grease.

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