hcaliber Posted May 23, 2019 Share Posted May 23, 2019 Hey, proud new owner of 68 Riviera! In process of trying to find out were all my washer fluid goes after a cruize i found... washer pump assembly has 3 ports...bigger center one connects to tank, one outer connects to jets and other tees into vaccuum supply...no check valves anywere...testing the pump both outer ports discharge puffs of air (just testing dry)...if i suck on the were vaccuum supply connects to pump assembly i get washer fluid in my mouth from tbe resivoir...soo apperantly my car is thirsty. What am i missing? was this hooked up incorrectly from previous owner? do i need a check valve somwere or is my pump piston assembly faulty?... i cant find any hose diagram online. Thanks Link to comment Share on other sites More sharing options...
ted sweet Posted May 23, 2019 Share Posted May 23, 2019 sounds like a bad pump Link to comment Share on other sites More sharing options...
cheezestaak2000 Posted May 23, 2019 Share Posted May 23, 2019 (edited) i don't recall ever seeing a washer pump hooked to a vac. line. i'll bet your spark plugs are nice and clean. the 3 hoses should go to the supply, and the smaller ones to the spray nozzles Edited May 23, 2019 by cheezestaak2000 (see edit history) 1 Link to comment Share on other sites More sharing options...
Frank DuVal Posted May 23, 2019 Share Posted May 23, 2019 GM cars of that era, I have only seen the large pump port connected to the reservoir, and the two smaller ports connected to a squirter nozzle (one per port). Sounds like someone did not have a vacuum hose diagram. On the plus side, you now have a Turbo Rocket Fluid injector system! 😀 (ala 1962 Oldsmobile Jetfire turbo V-8 methanol injection tank). 1 1 Link to comment Share on other sites More sharing options...
hcaliber Posted May 23, 2019 Author Share Posted May 23, 2019 haha yup.. no carbon here! I was curious about the configuration to...makes no sense...i may have to pull it apart. so the piston alone is enough to pull fluid from resivoir without aid of vaccuum?... i tryed that configuration to but without check valve any fluid lifted from resivoir would just drain back.. Link to comment Share on other sites More sharing options...
Frank DuVal Posted May 23, 2019 Share Posted May 23, 2019 You can suck up water from a depth of 32 feet at sea level. That is the limit, as atmospheric pressure is actually pushing the water up to the pump (at 14.7 psi). So, no, vacuum helper is not needed on GM cars with the typical piston pump on the windshield wiper motor. The check valves are inside the pump. The black square in this picture: https://www.amazon.com/Anco-6106-Washer-Pump/dp/B0009IK6CU/ref=asc_df_B0009IK6CU/?tag=hyprod-20&linkCode=df0&hvadid=331754389630&hvpos=1o1&hvnetw=g&hvrand=10656883598819141811&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9008199&hvtargid=pla-828919765912&psc=1 1 Link to comment Share on other sites More sharing options...
hcaliber Posted May 23, 2019 Author Share Posted May 23, 2019 so what would this extra vaccum port be for? Link to comment Share on other sites More sharing options...
hcaliber Posted May 24, 2019 Author Share Posted May 24, 2019 cut some hoses down to seal better.. connected it without vaccuum pump line and works like a charm! thanks guys!... still wonder what that extra port is for.. Link to comment Share on other sites More sharing options...
Frank DuVal Posted May 24, 2019 Share Posted May 24, 2019 Google 1968 Buick Riviera Vacuum Diagram. I found one I could read before I went to the website, where I was asked to join.👍 Link to comment Share on other sites More sharing options...
John_Mereness Posted May 25, 2019 Share Posted May 25, 2019 On 5/23/2019 at 11:12 PM, hcaliber said: cut some hoses down to seal better.. connected it without vaccuum pump line and works like a charm! thanks guys!... still wonder what that extra port is for.. It's a vent Link to comment Share on other sites More sharing options...
hcaliber Posted May 25, 2019 Author Share Posted May 25, 2019 haha its a vaccum leak... 1 Link to comment Share on other sites More sharing options...
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