SOHC Cam timing question - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 08-24-2015
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SOHC Cam timing question

When retiming my drivers side camshaft do i set cylinder 1 at 0 degree absolute TDC or 10 degrees BTDC? I have marks for both of them on the crank pulley. I tried setting the timing up on 0 degree tic but it ran like crap. It would hardly idle and when i put it into gear it would usually stall, but once it got up over about 2000 rpm it would seem to run fine. I just want to make sure i have the timing set right before pinning the problem on something else.
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Old 08-25-2015
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Cam timing would always be setup with crank at 0deg TDC, on any engine.
This is strictly about compression and firing order.

Spark timing is adjusted for TDC #1 compression stroke, for base spark timing BTDC

If you have a compression gauge test compression, 4.0l SOHC has 9.7:1 ratio so you should be above 170psi(all spark plugs removed to get faster crank speed)
Test at least 2 cylinders on both banks

Pictures here on cam timing: http://www.explorerforum.com/forums/...d.php?t=269671
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