Cam gear timing mark 2.4L SOHC, timing belt replacement, 96 Galant S - 07-04-2006 , 10:44 AM
Where is the correct cam gear timing mark on this engine?
I recently had the timing belt break on my '96 Galant 2.4L SOHC engine.
The engine has 180K miles on it, but was running great. I'm trying to
install a new timing belt (and balancer belt) but I'm having trouble
aligning the cam gear timing mark to the timing mark on the cylinder
head. All other timing marks are aligned and the #1 piston is on TDC of
compression stroke. None of the instructions I have show the timing
mark for the cam gear very clearly. There appears to be an arrow shaped
casting on the head that is right at the top edge of the head on the
right side of the cam gear (facing front of engine). When I try to put
the cam in this position it is very difficult, and it appears that the
intake valves of #4 are opening and hitting the piston. I don't want to
apply too much pressure for fear of damaging something in the valve
train. Am I looking at the wrong mark on the head? The timing mark on
the cam gear is painted white.
I removed the head and had a complete valve job done. No valves were
bent even tho this is an interference engine. It was running at an idle
when the belt broke.
This is the first time I have come across balance shafts on a car
engine. I used to be a John Deere tractor mechanic and I know many of
their 4 cyl. engines had gear driven balance shafts. Anyone have good
pictures or illustrations from a service manual for the cam gear
Re: Cam gear timing mark 2.4L SOHC, timing belt replacement, 96 Galant S - 07-04-2006 , 07:45 PM
Never mind - I found the timing mark on the valve cover. I didn't have
the cover on yet.
donh (AT) wielanddesigns (DOT) com wrote:
Re: Cam gear timing mark 2.4L SOHC, timing belt replacement, 96 Galant S - 07-04-2006 , 08:08 PM
<donh (AT) wielanddesigns (DOT) com> wrote
The timing mark on the cam sprocket is found almost lined up with the lock
tang on the cam. The sprocket timing mark is then lined up with the mark on
the top of the head. ie the sprocket timing mark is at the top of the
sprocket. All other things being correct, the cam belt tensioner can then
If you have not ABSOLUTELY done the balance belt alignment AND the oil pump
alignment properly, the engine will run, but there will be a strong
(possibly loud) vibration at about 2500 rpm. A simple rev of the engine will
verify this. I've heard mechanics who should know better justify this
vibration as "exhaust rattle" ... This rattle can be enough to cause the oil
filter to fall off if you leave it.
In other words, make sure the engine revs smoothly before you replace the
cam belt cover and the external belts.