Lumbar pump repair - ZR-1 Net Registry Forums

Z FOR 2 · 02-27-2011

I have not been on the forum very long, and seldom have anything to add, but, this forum helped me tremendously today.

My lumbar pump in each seat did not work. The pumps would not even run. I checked the repair manual, and after doing all of the tests to be sure my switches were working and I had power going to the pumps, all the repair manual suggested I do is to replace each pump.

I inquired at my local Chevy dealer and found that the Jasco lumbar pump is no longer available. (I did not ask if a repair kit was available, though I don't know if Chevrolet ever sold a repair kit for this pump). I also inquired at a vintage car parts house and others on the internet, but found that no one I checked with had the pump in stock.

I did a search on this forum and found that the pumps could be repaired by cutting new diaphrams from a vinyl shop glove. The post even had pictures and a description of how to remove and repair the pumps.

I thought it would be worth a try, so this afternoon I took the pumps apart. Sure enough, what I found was exactly what was described in the post. The diaphrams in each pump had crumbled and were in pieces. As the diaphram was broken, the pump could no longer turn. I cut new pieces from the shop glove, replaced the diaphram and put the pumps back in the seats. Each lumbar pump now works like new.

Thanks for the help.

Z FOR 2 · 02-27-2011

The origiinal post was back in January 2008. It was titled "Jasco Lumbar pump repair" and was listed in the "general" posting section.

So far, it seems to work for me!

ZR1@gmx.com · 02-27-2011

Wow! There is so much information here waiting for me to find! Thanks for your post, I am off to the hardware store in the morning for a set of latex gloves!

Z FOR 2 · 02-27-2011

Yes, that is the post I was looking at. We are close to setting a new record for snow here in Aberdeen. We don't need any more, and March is usually when we get a lot of snow.

Z FOR 2 · 02-27-2011

We have received well over 60 inches of snow so far this year. Not too bad considering our average snowfall is only about 37 inches. We just got another inch this morning. It will probably be another very wet spring around here again. Looks like it worked for the farmers this year. Not too sure they can depend on the prices and yield for this next year.

Hammer · 02-27-2011

Nice fix Jerry. I too had to repair my driver side pump. Works like a charm.
Spring is around the corner.

VetteVet · 02-27-2011

Eckler's (and others) offer repair kits.

http://www.ecklers.com/corvette-spor...1984-1993.html

lakemeadzmonster · 03-17-2011

I did both lumbar pumps on 1990 #1217 that way over 6 years ago and even in Las Vegas dry Heat they still work like new, the secret just like a lot of other people said Heavy Duty yellow latex dishwashing gloves and a little lube, it was such an upgrade over stock.

-=Jeff=- · 03-17-2011

I used an old bicycle inner tube to fix mine..

Vettevern · 05-04-2013

Any suggestions on how to get tubing connectors apart without breaking them?

02-27-2011	#2
Z FOR 2 Join Date: Apr 2010 Location: Aberdeen, SD Posts: 24	Re: Lumbar pump repair The origiinal post was back in January 2008. It was titled "Jasco Lumbar pump repair" and was listed in the "general" posting section. So far, it seems to work for me! __________________ [B][FONT=Arial Black][COLOR=darkred] Jerry B [/COLOR][/FONT][/B] [FONT=Arial Black][COLOR=darkred]'93 40th Anniversary ZR-1 #0246 "Z FOR 2" '03 50th Anniversary # 9590 "LETERGO" '13 60th Anniversary 427 # 0198 "FSTFWRD" [COLOR=Navy]Love the "Power of 3" :usa: [/COLOR] [/COLOR][/FONT]

02-27-2011	#3
ZR1@gmx.com Join Date: Oct 2010 Location: Sedalia, MO Posts: 150	Re: Lumbar pump repair Wow! There is so much information here waiting for me to find! Thanks for your post, I am off to the hardware store in the morning for a set of latex gloves! __________________ Fun 91 #303

02-27-2011	#4
Z FOR 2 Join Date: Apr 2010 Location: Aberdeen, SD Posts: 24	Re: Lumbar pump repair Yes, that is the post I was looking at. We are close to setting a new record for snow here in Aberdeen. We don't need any more, and March is usually when we get a lot of snow. __________________ [B][FONT=Arial Black][COLOR=darkred] Jerry B [/COLOR][/FONT][/B] [FONT=Arial Black][COLOR=darkred]'93 40th Anniversary ZR-1 #0246 "Z FOR 2" '03 50th Anniversary # 9590 "LETERGO" '13 60th Anniversary 427 # 0198 "FSTFWRD" [COLOR=Navy]Love the "Power of 3" :usa: [/COLOR] [/COLOR][/FONT]

02-27-2011	#5
Z FOR 2 Join Date: Apr 2010 Location: Aberdeen, SD Posts: 24	Re: Lumbar pump repair We have received well over 60 inches of snow so far this year. Not too bad considering our average snowfall is only about 37 inches. We just got another inch this morning. It will probably be another very wet spring around here again. Looks like it worked for the farmers this year. Not too sure they can depend on the prices and yield for this next year. __________________ [B][FONT=Arial Black][COLOR=darkred] Jerry B [/COLOR][/FONT][/B] [FONT=Arial Black][COLOR=darkred]'93 40th Anniversary ZR-1 #0246 "Z FOR 2" '03 50th Anniversary # 9590 "LETERGO" '13 60th Anniversary 427 # 0198 "FSTFWRD" [COLOR=Navy]Love the "Power of 3" :usa: [/COLOR] [/COLOR][/FONT]

02-27-2011	#6
Hammer Join Date: Apr 2006 Location: Ideho Posts: 2,653	Re: Lumbar pump repair Nice fix Jerry. I too had to repair my driver side pump. Works like a charm. Spring is around the corner. __________________ [I][FONT=Comic Sans MS]John Boyd[/FONT][/I] [I][FONT=Comic Sans MS][SIZE=1]Ideho[/SIZE][/FONT][/I] [FONT=Comic Sans MS][SIZE=1][I]2015 ZL1 [/I][I]Camaro #1121 BLACK/BLACK 6 SPD (540 RWHP)[/I][/SIZE][/FONT] [I][FONT=Comic Sans MS][SIZE=1]1991 ZR-1 #458 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK 72[/COLOR]k miles ([B][COLOR=red]SOLD[/COLOR][/B]) 1991 ZR-1 #473 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK [/COLOR]37k miles ([B][COLOR=red]SOLD[/COLOR][/B])[/SIZE][/FONT][/I]

02-27-2011	#1
Z FOR 2 Join Date: Apr 2010 Location: Aberdeen, SD Posts: 24	Lumbar pump repair I have not been on the forum very long, and seldom have anything to add, but, this forum helped me tremendously today. My lumbar pump in each seat did not work. The pumps would not even run. I checked the repair manual, and after doing all of the tests to be sure my switches were working and I had power going to the pumps, all the repair manual suggested I do is to replace each pump. I inquired at my local Chevy dealer and found that the Jasco lumbar pump is no longer available. (I did not ask if a repair kit was available, though I don't know if Chevrolet ever sold a repair kit for this pump). I also inquired at a vintage car parts house and others on the internet, but found that no one I checked with had the pump in stock. I did a search on this forum and found that the pumps could be repaired by cutting new diaphrams from a vinyl shop glove. The post even had pictures and a description of how to remove and repair the pumps. I thought it would be worth a try, so this afternoon I took the pumps apart. Sure enough, what I found was exactly what was described in the post. The diaphrams in each pump had crumbled and were in pieces. As the diaphram was broken, the pump could no longer turn. I cut new pieces from the shop glove, replaced the diaphram and put the pumps back in the seats. Each lumbar pump now works like new. Thanks for the help. __________________ [B][FONT=Arial Black][COLOR=darkred] Jerry B [/COLOR][/FONT][/B] [FONT=Arial Black][COLOR=darkred]'93 40th Anniversary ZR-1 #0246 "Z FOR 2" '03 50th Anniversary # 9590 "LETERGO" '13 60th Anniversary 427 # 0198 "FSTFWRD" [COLOR=Navy]Love the "Power of 3" :usa: [/COLOR] [/COLOR][/FONT]

02-27-2011	#7
VetteVet Join Date: Jan 2009 Location: Mandeville, LA Posts: 340	Re: Lumbar pump repair Eckler's (and others) offer repair kits. http://www.ecklers.com/corvette-spor...1984-1993.html

03-17-2011	#8
lakemeadzmonster Join Date: Nov 2006 Location: Las Vegas, Nevada Posts: 137	Re: Lumbar pump repair I did both lumbar pumps on 1990 #1217 that way over 6 years ago and even in Las Vegas dry Heat they still work like new, the secret just like a lot of other people said Heavy Duty yellow latex dishwashing gloves and a little lube, it was such an upgrade over stock. __________________ [SIGPIC][/SIGPIC] Last edited by lakemeadzmonster; 03-17-2011 at 02:12 AM. Reason: spelling

03-17-2011	#9
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: Lumbar pump repair I used an old bicycle inner tube to fix mine.. __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

05-04-2013	#10
Vettevern Join Date: Apr 2012 Location: California Posts: 12	Re: Lumbar pump repair Any suggestions on how to get tubing connectors apart without breaking them?