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Compression loss after cylinder re-installation

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jerome1

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Oct 22, 2012
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We had to remove a cylinder due to a minor problem with a plug insert and did some exhaust controls / repairs during that time.
Just re-installed the cylinder and all the rest but one cylinder is exhibiting a very low compression with leak from the exhaust. Same side as the one we removed so looks like the exhaust valve not closing properly. Before that all compressions were very high.

It was cold today and I am wondering if there could be an issue with the hydraulic lifters / pushrods not working properly after re-installation of the cylinder.
Any potential issue around that during re-installation ? Does it takes some time to get the lifters working normally again ?
 

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