Firewall pics needed for '70s
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Team Owner
Joined: Sep 2006
Posts: 31,236
Likes: 4,327
From: Westminster Maryland
Hi Wes,
The routing of the harness and the vacuum hoses varied from year to year if you want to be accurate you really need to see photos for the particular year you're working on.
Here are some pictures from my 71. Right off the bat this is different than a 70 because of the location of the wiper door vacuum relay and the 2 hard vacuum lines transversing the firewall instead of hoses varies from a 70.
But maybe these will be of some use.
Regards,
Alan
The routing of the harness and the vacuum hoses varied from year to year if you want to be accurate you really need to see photos for the particular year you're working on.
Here are some pictures from my 71. Right off the bat this is different than a 70 because of the location of the wiper door vacuum relay and the 2 hard vacuum lines transversing the firewall instead of hoses varies from a 70.
But maybe these will be of some use.
Regards,
Alan
Last edited by Alan 71; Oct 21, 2016 at 09:28 AM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Hi Wes,
The routing of the harness and the vacuum hoses varied from year to year if you want to be accurate you really need to see photos for the particular year you're working on.
Here are some pictures from my 71. Right off the bat this is different than a 70 because of the location of the wiper door vacuum relay and the 2 hard vacuum lines transversing the firewall instead of hoses varies from a 70.
But maybe these will be of some use.
Regards,
Alan
The routing of the harness and the vacuum hoses varied from year to year if you want to be accurate you really need to see photos for the particular year you're working on.
Here are some pictures from my 71. Right off the bat this is different than a 70 because of the location of the wiper door vacuum relay and the 2 hard vacuum lines transversing the firewall instead of hoses varies from a 70.
But maybe these will be of some use.
Regards,
Alan
Pictures always help even if they are a little different.sure a lot of vacuum hoses in this old 70 although by reacing all of them it helps to understand how this system works.Biggest problem I have run into was vacuum relays leaking although soaked them in some auto trans sealer and for now they came back to life
Thanks
Wes
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,851
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Alan's pictures are awesome, I'm not sure if there is any differences I've not look at the part applications on this. Here are the diagrams from the AIM for 1970. I have a 70 with most the original hoses on it but the cars in storage so that won't help.
Last edited by Willcox Corvette; Oct 21, 2016 at 12:13 PM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Thank you for the pictures although my 70 has the wiper vacuum relay on the firewall ?? If sometime it would be possible to look at your 70 Please let me know as the A.I.M is not real clear sometimes
Thanks again
Wes
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Team Owner
Joined: Sep 2006
Posts: 31,236
Likes: 4,327
From: Westminster Maryland
Hi Wes,
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
Last edited by Alan 71; Oct 21, 2016 at 04:16 PM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Hi Wes,
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
Yes I got confused when Wilcox sent me the schematic showing '70 being in the same place as yours so it looks like G.M.started in 68 putting it on right fender well then moved it to firewall then back to fender well.My 70 is not an NCRS car so I am just trying to make hoses and wires look a little better
Thanks
For assistance
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Hi Wes,
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
It appears from you're photo that the wiper door relay is mounted on the firewall near the master cylinder.
This is where I'd expect to typically see it on a 70.
The location of that relay has a big effect on the vacuum hose routing on the firewall.
You can understand how the routing would change when the relay is mounted on the rear side of passenger's side apron.
Regards,
Alan
These 4 hoses are on their way to the relay on the apron on a 71.
Couple of things.Does your 71 have the brass washer tubes on the wiper arms?if do you have a picture mine were off laying in a box when I bought my 70 corvette.
Also in that same box was a(what looks like part of a metal relay .It says Littlefuse Inc. And part #3961573 I think it mounts just to right of wiper motor in my pic I posted
Thanks
Wes
Team Owner
Joined: Sep 2006
Posts: 31,236
Likes: 4,327
From: Westminster Maryland
Hi Wes,
Here are the details on the washer tubes and plastic clips.
There were 4 varieties of clips and the number on the arms often varied…..3 or 4 each side.
The Paragon Reproductions site has a nice drawing showing where the clips typically were, and photos of the clips themselves.
Regards,
Alan
RIGHT side:
There is an additional clip like this one hidden by the wiper door in this photo.
LEFT side:
Here are the details on the washer tubes and plastic clips.
There were 4 varieties of clips and the number on the arms often varied…..3 or 4 each side.
The Paragon Reproductions site has a nice drawing showing where the clips typically were, and photos of the clips themselves.
Regards,
Alan
RIGHT side:
There is an additional clip like this one hidden by the wiper door in this photo.
LEFT side:
Last edited by Alan 71; Oct 23, 2016 at 05:25 PM.
Thread Starter
Drifting
Joined: Jan 2014
Posts: 1,866
Likes: 140
From: Sadieville Kentucky
Seat belt light on center gauged
Hi Wes,
Here are the details on the washer tubes and plastic clips.
There were 4 varieties of clips and the number on the arms often varied…..3 or 4 each side.
The Paragon Reproductions site has a nice drawing showing where the clips typically were, and photos of the clips themselves.
Regards,
Alan
RIGHT side:
There is an additional clip like this one hidden by the wiper door in this photo.
LEFT side:
Here are the details on the washer tubes and plastic clips.
There were 4 varieties of clips and the number on the arms often varied…..3 or 4 each side.
The Paragon Reproductions site has a nice drawing showing where the clips typically were, and photos of the clips themselves.
Regards,
Alan
RIGHT side:
There is an additional clip like this one hidden by the wiper door in this photo.
LEFT side:
Looking at two wire diagraham s I can't find the description for the two wire socket for the seat belt light?? I saw in another post you said 69 to 71 Are the same.Any help would be appreciated
Wes
