I have a 95 b18c1 obd1 I'm rebuilding my motor and need to buy a new oil pump. What is the difference between obd1 and obd2 oil pumps? Because the part numbers are different and the obd2 pump is cheaper also!

 

i know the obd2 uses a CP sensor by the pump. my guess is that's the difference. i think OEM honda and melling are your only two decent choices in oil pump land.

 

found your answer in an ebay listing

Note: this pump will fit ALL b-series motors, however, the lower timing belt cover on the 90-95 integra's does not fit properly. most choose to just not use the lower cover after installing the pump, or modify it to fit, but we also have another option. in our e-bay store is a listing for a 96-01 lower timing belt cover that properly fits this pump, and you can purchase it if you choose for your 90-95 integra(if that is what you own) to replace the original lower cover. if you do not have a 90-95 integra, please disregard this message

 

buy things buy price. don't worry if it will fit your car or not.

 

Thanks man! Yeah read that too before on e-bay. Went to hondapartsunlimitid.com Thats were I plain on buying every thing I need for my rebuild gaskets, water pump, oil pump, timing belt, etc. I called my local Acura dealership and there prices were way higher