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Originally Posted by mileshawk56
The cap looks like any other, on the top embossed safety advice and in the centre 140
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140 is the now standard relief pressure rating for all 75/ZT engines. It indicates 140 mPa (milliPascals), which is around 1.4Bar or about 23psi.
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turn it over and the following round the bottom rim- PA 66 GF 30.
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That's simply the cose for the plastic it's made from (PolyAmide i.e. Nylon filled with 66% glass fibre). It's the standard for auto plastics.
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the orange part has a rectangle with No, repeat No number 140, but round the periphery REUTTER.
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Reutter is the manufacturer and appears on standard MGR caps.
TC