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TDC on the block

 
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Old 12-13-2014, 01:46 PM
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TDC on the block

dont say i didnt search, ive searched alot, but maybe not searching the right thing... but all i get is how to find TDC on compression stroke.

heres my issue. the flywheel on my H22a was not marked by whoever installed it. i know there is the TDC mark on the oil pump gear. but my timing belt is in excellent condition and didnt really want to go further in engine tear down. i will if i have to but just trying to see something here if anyone knows.

Im reinstalling my head on my block. i know to set timing piston 1 needs to be in TDC on compression stroke. however i have no way of seeing compression stroke because the head is not installed. so my question is this. TDC on piston one should be the same for compression and exhaust strokes in the block correct?
meaning to set the compression stroke, that will be done by the cam gears/shafts. so all i should have to do is put piston 1 at TDC, and the timing will be adjusted in the head. just seeing if anyone else has an opinion on this before i go ahead and install

it makes sense to me because for every full turn of the crankshaft, the camshafts turn 1/2 way creating the compression and exhaust stroke.

i think i am correct but if anyone else sees it differently then let me know and back up your opinion with fact please.
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Old 12-13-2014, 10:47 PM
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Re: TDC on the block

Correct, the block essentially doesn't know the difference in the compression and exhaust strokes. The only hint the block is given pertaining to the strokes is the crank sensor.

The strokes are set by the head and valves.
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Old 12-14-2014, 02:45 PM
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Re: TDC on the block

yea thats what i figured just wanted a second opinion. thanks man. i ended up having a mark on the flywheel thats going on anyway so its would of been fine. im mad excited to get my lude back on the road. still tons of work left to do though.

you good at brake lines nick? im thinking of deleting abs and doing a brake tuck while the motors out, but im having trouble figuring out best way to route them... and i want to do a wire tuck too, but having trouble figuring out best routing for that too, oem routing is a mess. it will all probably come easier once the trans and my old block are out, but any tips are good. or maybe some help again if you have a free day sometime this week, come hang out if your not busy just let me know and ill pm my address.
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