Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › E30 – Misfire › Reply To: E30 – Misfire September 23, 2022 at 1:03 am #1002135 jmorgan456Participant I replaced the timing belt and I checked compression before replacing the head. The block was amazing. Factory crosshatch still on cylinders. The head has been heat cycled a few times, so perhaps I should do a valve job?