This has been covered before in the archives, but I thought I'd post a subject title that will show up easily on searches. If you are looking for an OEM replacement pump for the W/Washer pump that fits perfectly on Z cars, order a Trico 11-601.

 

These fit absolutely perfect in the rubber grommet. Later models may have to change out the connectors but that's no big deal.

 

Edited May 31, 20159 yr by Chickenman

Excellent

Original application is for 1973 - 1990 Isuzu's and Honda's, but they also fit just about any Datsun that has this style of pump. Not only Z cars, but 510's,1200's, PU Trucks etc.

 

Trico number ( 11-601 ) is still readily available, and you can cross reference to other manufacturers such  as Anco and AC Delco. AC Delco number is 86719. And of course Rock Auto has them in stock.

Edited June 1, 20159 yr by Chickenman

Just checked RockAuto for the Trico and ACDelco listings for my car and came up with generic pumps.  A P/N search found both in stock, $1 difference, I've ordered a Trico for my car.  Thanks to Chickenman for posting the P/N's.