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Lister D - Compression Loss

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Post by Ally's_Engines Tue Jan 06 2015, 17:50

I have a 1934 Lister D type. The old head gasket needed to be replaced, so I have placed a brand new copper one on. I did a test run and I can hear air hissing out of the holes where the push rods are. The head bolts are screwed tight and it can hold a full tank of water. Could anyone help me with this problem?
Thanks
Ally

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Post by Matth92 Tue Jan 06 2015, 17:54

that's allrite, that's just air out of the crankcase, those slots act as a breather, and I expect your leaking a bit of compression past the piston too, but wuldnt worry about it!

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Post by Ally's_Engines Tue Jan 06 2015, 22:36

That's very helpful, thanks. I think I'll check to see if the piston rings are free too.

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1951 Petter A1, 1965 JAP model 6, 1950's Villiers mk10 compressor set, WW2 Douglas FT35, 1960's ATCO Villiers Lawnmower and Petter A2
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Post by billypurves Wed Jan 07 2015, 20:44

Run your engine until it is hot, then retighten your head nuts.
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Post by Ally's_Engines Thu Jan 08 2015, 10:11

I'll give that a go too, thanks!

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