AVOID RISK OF DAMAGE

NZ Truth, Issue 1189, 13 September 1928, Page 20

AVOID RISK OF DAMAGE

Useful Hints Ck Decarbonizing

Your Engine

' THE job of decarbonizing an engine is simple enough, but a few - ' l precautions greatly minimise the risk of doing any damage to , the engine. . '

•THE cylinder head haying been re*l' moved and laid aside, work should . , be commenced on' the pistpps. , The crank Should be turned so that ?tw6 "6f them 'are- at.', the top of their 'stroke. ... , " ■ , * The oyllnder bores : of the other cylinders should be' stuffed tight withcoarae rags. The, 'pistons at the top can then be oleanod, using a scraper or a wide screw-driver, but the edgo should not be too sharp, otherwise the piston head will be scratched. As much of the carbon as, should be lifted out ; ; with a piece of kerosene tin or. other material, and the remainder of the dust picked tip with a rag moistened with kerosene;

The cleaned pistons are then moved half an inch or so down- the cylinders, and the . rest of the carbon can be right, out ..with the dampened Tag. ■ ;■'•';'':'■ The other pistons are , treated the same way. m tubni; ... The cleaning of th© cylinder head is a much, simpler^ matter. In replacing the head; every vestige of old gasket cenieht-or golclsiae. should be removed, andybpth^ surfaces wiped clean with a petrpirsoalcea rag and al-. lowed to ; \dry. ''£',;■:..-:' ■■■ .■'.■<,■?■■; „■■ :•.;..:, A coating of goldsize,: .or '■■other, cementing compound is then given to .both sides of the gasket, thin arid eyeh,. arid the cylinder head carefully brought down and bolted iri the usual mariner.