Quote:
Originally Posted by Itaro
I have the 4a-FE engine.
So, you are saying that I need to get it back to TDC compression stroke, stick a screwdriver in the #1 sparkplug hole and make sure that it is all the way up? and bridging e1 and t1 resets timing. got it.
how do I check and see if the camshafts were inserted properly?
thanks,
~~--Itaro
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well we have the same motor. it's an interference motor so both cams are connected by gears. unlike the 4aGe. so you want to look for these 2 specific marks. there are 2 per cam. you should be looking for the ones in these pictures that I posted. there are 2 timing marks and 2 installation marks. they need to line up like you see in these pictures exactly.
in these pictures the crank is at TDC! this is important.
as you can see in this picture above, the timing mark on the exhaust cam is at 9 o clock. and the timing mark on the intake cam is at 3 o clock. these need to line up when the installation marks are are at 12 o clock on both cams. now the picture below is what it should look like when you rotate the cam sprocket 360 degrees. given once you do that you are out of time. so make sure when you put the timing belt back on, your cam marks look like the picture above with the crank at TCD for no. one cylinder. this is critical. so if you rotate your cam sprocket 360 without the belt on, you will be in the intake stroke when the piston is at compression stroke. that means if you rotate the cam sprocket 360 without the belt on make sure you do it one more time to assure your valves are CLOSED when the piston is at TDC. now check out the picture below. this is what it should look like once you have rotated the cam sprocket 360 with the crank still at TDC.
I know this is all pretty confusing, but you basically want your crank at TDC while your intake and exhaust cam journals are closed. however, you want your exhaust cam journals(lobes) to be closer to pushing the valve open than the intake. or else you would end up pushing your exhaust out the intake ports and out your air filter
. so as far as cam rotation you want your exhaust cam to be a little further ahead in rotation than the intake. so your exhaust cam loves for number one cylinder should be at about4 o clock and your intake about 3 o clock. make sure you alight the marks that you find on the cam gears. don't get the knock pin mark on the cam sprocket confused with the timing and installation marks on the cam gears.
hope this helps.
these pictures and information are from the toyota dealer tech manual. not the horse shit chilton's haha
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