I'm undertaking a reasonably size job at the moment attempting to change my cam belt (and associated parts), variator, water pump and aux belt.
I bought all the tools a while back to do the job, so I have the locking tools, a DTI and the extension tube to go in the spark plug hole.
I've used the DTI to get the engine at TDC, but neither of the blocks seem to fit right, the inlet isn't too far off, but the exhaust looks like its at least one tooth out on the pulley.
Also I took out the DTI and turned the engine around until the inlet cam lobe was in the right place for the block to check the cam profile and it seems as though the profile of the block isn't right, seems like the base circle diameter of the lobe is too large for the block. Same problem on the exhaust cam.
I'm an engineer so I know why engine timing is important, I've timed chain driven motorcycle engines plenty of times, but never used cam locking tools. Are they sometimes a bit tight to fit? Could my timing really be that far out and the engine still run pretty fine? (a little diesel sounding as the variator needs changing, but still running fine)
The car is a facelift 156 1.6TS, I'd bought a set of blocks (OEM P/N: 1 825 042 000) from alfaworkshop, as these were the only ones listed for that size engine, I have noticed however that there is a 2004> part (OEM P/N: 1 870 734 000) available here:
Twinspark 147 and 156 1.6 (120 PS) cam blocks (1.870.734.000) :: TotallyAlfa
Does anyone know if they changed the cams or timing on the 1.6TS in 2004? and if my late 2003 car could require the newer tools?
So in summary:
- Do the blocks usually fit the lobes pretty well (not too tight on the base circle)?
- Is it concievable that my engines timing is that far out and running fine with all my valves still intact?
- Are the camshafts different from 2004>?
- Is there a chance that a late 2003 car could have a 2004 spec engine?
Any answers, suggestions or insight appreciated, need the car back together by middle of next week
, any help appreciated.
My engine is a 321.04 model, which is listed on totallyalfa for both the newer tools and the older tools (which are the ones I have)