Loud Tappet noises and lower engine power since my astra mk4 1.7dti had a reconditioned cylinder head fitted by a garage.
This is 3rd head as they had problems fitting supplier heads - they also blew ecu which they had to replace. also cambelt changed.
Went back for shim clearance adjustment but still same. Garage denying responsibility.
Recently, engine management light comes on for about 10 mins, then disappears.
What could also lead to tappet type noise and lower power after fitting reconditioned head?
Thanks in advance.