“SUN” SERVICE STATION

Sun (Auckland), Volume II, Issue 580, 5 February 1929, Page 6

“SUN” SERVICE STATION

THE "Motordom" section of The Sun includes in its service to readers a Queries and Answers Department, the object of which is to give accurate information regarding mechanical and touring subjects. Whatever the particular puzzle may be in either diagnosing irritating trouble?, or motoring information of any kind, "Headlight” will endeavour to help, or refer the point to men who are recognised automobile experts in their respective lines All communications must oe accompanied by the inquirer's name and address (not for publication), and sent to THE SUN “Service Station. Motordom.” THE SUN. Auckland. Answers will appear weekly in this column

F.S. —I have a 1925 Morris-Oxford and as 1 shall be touring in it in a few weeks, I have been overhauling the engine. Although the car has only done 700 miles since last decarbonising, I was surprised to find it really bad. Would increased air hole in the carburettor and too wide spark plug points cause excessive deposit? * * * Yes, both of these faults would be possible causes, and should be remedied. Would also suggest that you look to piston rings in case an excessive amount of oil is reaching the combustion chamber. ••Edit/'—Can you give me the names ! of any magazines published in the in- ! terests of motor-cycling, either weekly or monthly? ? * * • Principal magazines devoted to motorcycling are “The Motor Cycle,” and “Motor Cycling” (both British), and “The American Motor-cyclist and Bicyclist.” all weekly. V.P.S.—What is the weight of the of 1923 light six. About 661 b. . FF \ P - —Will you please answer the following question in your next Tuesday’s auto section? I have a 1926 Ford coupe equipped with a Ruckstell. When picking up speed from a slow speed there is a tnumping in the engine which disappeurs when the car has gained speed. pTbere is also a hum, at all speeds, which

sounds much like a larger car which is travelling in second or low gear. It is not the rear end, but seems to be under the floor boards somewhere. It causes the car to move forward by jerks while 1 am getting in motion. The thump in motor may be main bearing—the hum that you hear in the rear end. The jerk you get in picking up speed is probably ignition or valves. ould advise you to have your car examined by a reliable mechanic. C.P.C. 1 have a 1925 two-passenger Oodge coupe, at present equipped with ‘ x ,J - 1 ' tyres. fl) As 1 intend retvreing would y° u advise me whether I could use a SO X 5.25 tyre, and obtain the same results? (2) I also have two new o 0 x 5.77 tubes, could thev he used in a so x d. 25 casing? fl) You could use this tyre, but you obtain the same results. '(2) there is* a" * ‘ tLJ bes call be used but there is the danger of pinching the tube. retrieving lost nuts , RB.—-When overhauling the car the Lai!' ‘lfr ,J dropped a nut into the engine , U il de h rSh / ,<J ' 1 cou 'd see it, but not reach it easily. The wife was hurrying thot U T' JL* se ® lngr the trouble suggested and 4 . r ’ lecfi of ’ !vood lon S enough ft d bunp of grease to the end of v,'. 1 v ' as lol d to place the end wiih the grease on on top of the nut. , >i- i, '. oumi become embedded in the IFpals it on? Wrinkle worked W3U and