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Flat twins, flat fours and flat sixes. EJ head gaskets, FA24 carbon, boxer valve clearances and the sound.
Boxer Engines is the horizontally opposed club. EJ20 and EJ25 head gaskets, ringland failures and what really causes them, FA20 and FA24 direct injection and carbon build-up, flat six oiling, bore scoring and intermediate shaft history, unequal against equal-length headers and what each does to the sound, the low centre of gravity and the packaging problems that come with it, spark plug access that costs a weekend, and on the motorcycle side, boxer twin valve clearances, final drive wear and cylinder head rebuilds.
For verified owners of any horizontally opposed engine: flat twin, flat four or flat six, car or motorcycle.
What happens here: failure threads with mileage, oil analysis and what the machine shop found, head gasket and rebuild costs with invoices, header and exhaust comparisons with recordings attached, tuning threads that state fuel and knock data, oil and coolant temperature logs from track sessions, and buying checklists per engine family. Members with air-cooled flat engines will find the air-cooled club runs alongside this one.
No members yet. Applications are open.
Free on every membership. You apply with the machine in your garage and a reviewer decides, usually within 48 hours.
Checked by hand. Documents are only seen by the reviewers, through links that expire in 15 minutes.
No approved members yet. The first application could be yours.