ok i bought a "gsl se" oil pump from ebay, and i am comparing it to the pumps that were in the three 12as that i took apart and i have found no differences so far!!!! i spend about 200$$ canadian after all is said and done and i hope i dindt just buy another 12a pump from some ebay ********, is there some way i can tell ive got the pump in front of my allong with a dial caliper, and the part number is still on the box and the pump itself, kindof smudged but it says 02 165 does that sound right? i know the pump is supposed to be oversized but i dont know what to measure thats oversized... someone help before i get this clown banned from ebay, thanks guys

paul

 

Go to mazdatrix.com and compare their part numbers. I think all they do is take the prefix, and turn it into the suffix. Anyways, all the do is move the numbers around a bit.

 

'84-85 12a's have the same sized oil pump as the GSL-SE IIRC.

If the engines you took apart were all S3 engines, you could be looking at an identical oil pump.

I hate to say it, but if you've spent $200 on a stock oil pump, you've been severely gyped.

www.racingbeat.com and www.mazdatrix.com both have their 17.5mm race oil pumps for $145, and they're even hardened for extra durability!

Jon

 

200 CDN is what he payed

 

ya im not that mad but i guess it is a gsl se pump he didnt gyp me, i just got a new gsl se pump which is ok, ill use it in my build anyways and yes lovinthe7 its 200$$ canadian so its not like a huge ripoff cause thats with shipping and i rounded up from 175 cause its basically 200, i like even numbers

 

Yea,pretty sure only the turbo engines had a bigger pump.

 

The GSL-SE are much larger than the stock 12-A. If I have time to dig in my pile of junks, I will take pix of both models for comparison purposes.

 

The GSL-SE is 17.5mm as is any '84-'85 12A pump. I'd venture a guess and say any '83 to '85 12A had the high volume oil pump. They all had the beehive oil cooler, and the 12A turbo had a turbo, and its production run was '83 to '85. Makes sense to have only one oil pump model across three engines to keep costs down.

 

A little trivia for you. The nitrided R5 13B also had a 17.5mm oil pump.