Does a h22 motor just drop in a 91 accord , is there anything i should know

If it's the S model, it *should* as it has a F22 motor in it.. the Si and SE has a H23 motor, and the VTEC has a H22 motor. I have heard of people using the F22 transmission on a Prelude motor for longer gearing at highway speeds (per Honda-Tech.com), but I haven't tried the combination myself

I would only do this with a 92-93 EX Accord motor and keep it OBD0. I did this with no CEL codes, works perfect.

Swap the following parts from your old 91 engine to the 92-93 EX motor:

Intake manifold
Engine Wiring Harness
Distributor
Exhaust manifold (header)
Air Conditioner bracket and Air Conditioner Compressor

Keep your current ECU in the car. Put your transmission on the motor before you drop it in.

If you go to the 94-97 / 2.2 you will run into some additional sensors, crank position sensor, etc... with that motor since it switches over to OBD2 in 1996.

Good luck...

Any of the four years, 90, 91, 92 or 93 Accord engines will fit your Accord.

ok so hear me out, DO NOT! i repeat, NOT buy a h23... honda stopped making this motor completely in 97 these are the worst motors in the world! i know, your rod bearing blew, I KNOW! ive donr 30 of them. Buy an h22 swap for your car... or just the motor.. everything bolts up the same...then if you wan the performance wire up the vtec... 92-96 preludes came with the option of an h22... if you could find one out of your year model and not out of a 97 up, that would be best so all your vaccum lines are the same... youll have to use the h22 harness and ecu.. if its standard, you need to use a standard h22 harness, if its automatic, use an auto harness
hope this helps
replace the motor mounts that are bad

H22 swap

I assume your talking about the timing belt marks for the crank and cam,heres a diagram to help you.

did you change the fuel pump to a higher flow pump, a stock accord pump cannot meet the demand of the h22, also some thing to to look at the main relay, did you upgrade that

It sounds like you have air in the cooling system, it doesn't take much air to get one of these engines to do this. Most people just fill these cars up with coolant and cap them off and that's what happens. The easiest way I found to remedy this is take the cap off the radiator when the car is cooled down, top the antifreeze up and put a drain pan under the radiator, because some will spill over, Then start the car and let it idle. You will probably notice it start to produce significant bubbles, just keep topping it off as the bubbles work there way out. Once the cooling fans come on the level will start dropping again. Slowly top off the radiator as the level drops and once the fans stop pop the radiator cap on and it should be fully bled out. I hope this helps.

most lykly f22b

That depends on what motor your accord came with, If was the f22 it does work but requires some mods. Providing that the vechile you are installing it in is OBD1 also.