I have a 95 obd1 gsr swap I just put in my 00 civic si. I have swapped in a obd2 oil pump with crank sensor. My question is. Do I need the crank gear from a obd2 motor for the crank postioning sensor to read correctly?

 

absolutely. there is a ring on an obd2 gear that you have to have

honda also changed the TDC mark on the pumps/gears at least once.

use the correct gear for the correct pump. if you have an obd2 pump use a 96-01 crank sprocket

 

So I have to have a gsr gear or can I use a b16a2 gear?

 

Can anyone show me a picture or post a link to the gear?

 

it doesn't matter which one, they're the same.



#15.

 

Thanks. I found one already.

 

whatever you do, never use that obd2 gear on a JDM oil pump. it fits and all but the TDC indicator mark is in a different place. if you install an obd2 gear on a jdm oil pump and line everything up you will bend valves on start up

 

that makes absolutely no sense. the gear is mated to the crankshaft. tdc on the gear has no relation to the oilpump. the oilpump gear is a ring that is driven by the crank. the obly way tdc can be wrong on the gear is if the keyway on the crank is broken, or the tang on the timing gear is broken.


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you dont install the timing gear on the oilpump. you install it on the crank. if you bent valves because you think tdc on the gear is off by using a jdm pump (which is the same as a usdm pump) you should never work on a car.


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LOL

okay, i want to see you get a jdm engine with the jdm oil pump, slip on a usdm obd2 crank sprocket on the crank snout, line up the lines and start the engine

make sure to post the video when you do

i just love it when clueless people such as yourself post and try to mislead others

the ******* TDC line is in a different place smart guy. that means the motor won't be at TDC if you use the wrong sprocket on the wrong pump, TDC marks are in different locations

the only thing your post confirms is that you have never had a jdm itr or gsr engine and or haven't done the usdm conversion to notice the difference

over the years and back when i was into these cars i've had 2 gsr's and 4 jdm itr engines. believe me, i know every angle of the engine

you can set a short block to TDC with a usdm oil pump, slip on the usdm gear and the line with be on the dot on the pump. pull it off and put on the jdm sprocket and you'll be about 3 teeth off with the tdc line on that gear. like i said, i've tried it on the engine stand which is how i know it won't line up

with the engine assembled it would be very easy for someone to make this mistake and not realize it

 

tell me this then. how does the oil pump alter the mechanical timing between the crank snout and the timing gear, when the two parts are independent of one another. the oil pump doesnt even touch the timing gear. do you even k ow how these engines go together, because your post says otherwise. the oil pump has absolutely nothing to do with mechanical timing.

hell the pump doesnt even touch the gear. the ******* timing gears only form of alignment is between the keyway in the crank, and the tang on the timing gear.


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the ONLY WAY the timing can be off is if somehow honda machined jdm cranks different. which would be stupid because the crank keyway always equal tdc.

youre the dumbass here dude. oil pumps do not have anything to do with timing gear alignment. the keyway is always machined to be tdc, therefore the mark on the timing gear will always equal tdc.



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unless what youre trying to say is the marks between the usdm and jdm pumps/gears are stamped different. which I could see. but the actual gear alignment will be the same, you just have to remwmber that the ti.ing marks are shifted. btw I dont go by those marks. I use the timing cover and pulley+verifying piston position to get tdc.


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also I would just edit, but the app wont let me. anyways it sounds like we have a miscommunication because from what you were saying was that magically the gear would somehow shift just by changing the pump, when its the timing marks are located in a different spot. regardless, if you verify tdc properly then I cant imagine someone messing up like that. are jdm timing covers wacky like that too or is it just the pump/gear marks.


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My jdm timing cover will not work on the usdm oil pump. I have lookef at the oil pumps side by side and the marks are slightly off compared to each other. Now I will double check the cranc gear once the obd2 gear gets here in the mail. I've delt with usdm motor for 10 years. But couldn't remember the specific's on a obd1 motor. All info is greatly appreciated.

 

it doesn't. it's only the markers that are off. the jdm and usdm use different market locations. this is why i said a usdm pump with a jdm sprocket won't allow you to alight the crank line to the marker on the oil pump correctly. they physically fit and all but timing belt changes will be a disaster waiting to happen

someone could verify tdc other ways but again, disaster waiting to happen if anyone else ever does a timing belt

 

Funny you do all that work because you can bypass that sensor for obd2 ecu

 

only if they go by the bottom timing gear lol. whenever I do my timing belt I use the pulley and timing cover, and a screwdriver set inside the spark hole for cyl 1. mostly cause to me going by the gear was a bit of a pita with the engine in the car.

I see why you said not to mix them up though. its a potential disaster waiting to happen


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