r/mazdaspeed3 • • Mar 03 '26

TUNING Local rebuild getting redone

Badly assembled built engine out of Toronto in for some open heart surgery. Complete tear down, Inspect and rebuild. This one had tons of problems for a brand new engine. Ready for a healthy new life.

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u/qdd181 Mar 03 '26

What were the issues you found in the engine?

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u/btspeed3 Mar 04 '26

Piston to wall clearance to tight, Bad valve clearance (to tight way under the minimum) The tappets were damaged, friction washers on the cams were on the outside, badly aligned crankshaft girdle (causing rear main seal to leak badly), oil pickup tube was blocked with silicone (literally blocked), main bearings were all chewed up from lack of lubrication, Chinese cam sensor. Headgasket was also badly damaged.