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I have a 2013 GM 4.3 liter (Volvo Penta 4.3GL - 190hp 2bbl carb) in a Hurricane Sundeck Sport 188 boat - with 190 original hours. It will get a valve train tap/rattle on the left side of the engine towards the front. Sounds like the left front cylinder. This correlates with a drop in oil...

This Mazda 2.3 was burning oil at a high rate. Roughly 1 quart to 250 miles. Upon teardown, I found the expander rings completely gummed shut. I'm rebuilding this one, but just curious if you guys were aware of any solution that would clear this type of gunk and reduce oil consumption without a...

I recently picked up a 2007 Mazda MazdaSpeed 6 that had an engine knock/noise. Here is a video that I took of the engine on a cold start. Hammers for a short time then goes nearly silent followed by some light tick noises. Video of cold engine start I pulled the cylinder head off and found...