986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Need help with Camshaft timing for 1999 Boxster 2.5 L

Kice · 04-12-2023, 01:04 PM

Hi

my 1999 Boxster 2.5 L only fires on Bank 1 after engine overhaul. Electrical connections on Bank 2 seem all good, and the injectors work too (found unburnt fuel in the exhaust manifold).

I had installed the camshafts exactly as per workshop manual and turned the engine many times to ensure that the markings stay aligned. But now I observe at least once cycle where all inlet valves are closed, which clearly should not be. Re-reading the workshop manual 15-20 I am now unclear if a full rotation is needed between adjusting each Bank, or not.

Grateful for any advice. See pictures below, showing the camshaft markings in TDC front (F) and rear (R). Thanks!

04-12-2023, 01:04 PM	#1
Kice Registered User Join Date: Apr 2021 Location: MD Posts: 22	Need help with Camshaft timing for 1999 Boxster 2.5 L Hi my 1999 Boxster 2.5 L only fires on Bank 1 after engine overhaul. Electrical connections on Bank 2 seem all good, and the injectors work too (found unburnt fuel in the exhaust manifold). I had installed the camshafts exactly as per workshop manual and turned the engine many times to ensure that the markings stay aligned. But now I observe at least once cycle where all inlet valves are closed, which clearly should not be. Re-reading the workshop manual 15-20 I am now unclear if a full rotation is needed between adjusting each Bank, or not. Grateful for any advice. See pictures below, showing the camshaft markings in TDC front (F) and rear (R). Thanks!