Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette Sponsored by
VBP

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 02-25-2004, 11:07 PM   #1
David68
CF Senior Member
Support Corvetteforum!
 
Member Since: Sep 1999
Default Vortec intake & thermostat bypass?

After extensively searching for the topic I need, without success, I've come for help. Several weeks ago there was a post detailing why the vortecs need to have the hose from the vortec intake to the water pump. I'm to that point now and would like a repeat of that post or a link. There was reference to this arrangement being on the big blocks and even a picture of someone having done this. The alignment from the intake to the pump is not a straight shot and I'm curious how others have plumbed this. Any help and guidance is appreciated.
David68 is offline   Reply With Quote
Old 02-26-2004, 12:34 PM   #2
David68
CF Senior Member
Support Corvetteforum!
 
Member Since: Sep 1999
Default Re: Vortec intake & thermostat bypass? (David68)

Anybody?? :confused:
David68 is offline   Reply With Quote
Old 02-27-2004, 11:13 PM   #3
David68
CF Senior Member
Support Corvetteforum!
 
Member Since: Sep 1999
Default Re: Vortec intake & thermostat bypass? (David68)

For the weekend view.
Thanks.
David68 is offline   Reply With Quote
Old 02-28-2004, 03:06 AM   #4
pillowmeto
CF Senior Member
 
pillowmeto's Avatar
 
Member Since: Apr 2003
Location: I blame my Dyslexia MD
Send a message via AIM to pillowmeto
Default Re: Vortec intake & thermostat bypass? (David68)

:lurk:
pillowmeto is offline   Reply With Quote
Old 02-28-2004, 09:29 AM   #5
American Boy
CF Senior Member
 
American Boy's Avatar
 
Member Since: Jun 2001
Location: Quebec
Default Re: Vortec intake & thermostat bypass? (David68)

Hi,

I can't find the link either but I was a part of it so I'll explain from what I remember. Here is the pic:
Click the image to open in full size.

I didn't take pic of the rubber hose attach and my car is away for the winter. What I did was to put fitting in the intake and water pump and then I did a model of the hose that I needed (with metal wire). I went to the part store and ask the guy at the counter to find me something that would look-a-like. He found one, it was around 1/2'' dia if I remember correctly. I had to cut a little lenght but it was a close fit. The hose start at the water pump straight up, does a 90 degrees to the horizontal and then another 90 degrees toward the intake fitting.

Good luck

Stephan


[Modified by American Boy, 8:36 AM 2/28/2004]
American Boy is offline   Reply With Quote
Old 02-28-2004, 10:47 PM   #6
David68
CF Senior Member
Support Corvetteforum!
 
Member Since: Sep 1999
Default Re: Vortec intake & thermostat bypass? (American Boy)

Thanks Stephan. That's one method I'll look into.
David68 is offline   Reply With Quote
Old 02-29-2004, 02:24 PM   #7
Older Than Dirt
CF Senior Member
 
Older Than Dirt's Avatar
 
Member Since: Aug 2002
Location: Scottsboro Alabama
Default Re: Vortec intake & thermostat bypass? (David68)

Quote:
Several weeks ago there was a post detailing why the vortecs need to have the hose from the vortec intake to the water pump.
I have a ZZ430 with a Edelbrock Air Gap Vortec intake. My intake has these same provisions. What is the purpose of a hose directly from the intake to the top of the water pump?
Older Than Dirt is offline   Reply With Quote
Old 02-29-2004, 07:15 PM   #8
American Boy
CF Senior Member
 
American Boy's Avatar
 
Member Since: Jun 2001
Location: Quebec
Default Re: Vortec intake & thermostat bypass? (Older Than Dirt)

The heads are missing a hole that allow the cooling circuit to by-pass the thermostat from the water pump through the passenger side head and intake. That hole prevent pressure build-up during warm-up. In other word, if you don't have it, pressure will prevent thermostat to open until the engine get really hot (read in the red).

Stephan
American Boy is offline   Reply With Quote
Old 02-29-2004, 08:25 PM   #9
chewy
CF Senior Member
 
Member Since: Nov 2002
Location: Concord Ca.
Default Re: Vortec intake & thermostat bypass? (American Boy)

Strange I don't have one hooked up. Absolutely no trouble. I am using a short water pump that doesn't have any provision for a top hose fitting.
chewy is offline   Reply With Quote
Old 02-29-2004, 10:32 PM   #10
neverendingproject
CF Senior Member
 
Member Since: Jan 2003
Location: memphis tn
Default Re: Vortec intake & thermostat bypass? (chewy)

from what i have been told, this only needs to be done on 86 and newer blocks. supposedly the passage is in the block , not the heads. i dont know for sure though.

found where i read it at. my intake instructions.
cant copy and paste , so i'll quote.
"This intake manifold is primarily intended for use with Vortec heads on pre-Vortec blocks. Standard engine blocks route thermostat bypass water from the block directly to the water pump through the passenger side water pump mounting flange. If the manifold is used on a 1996 and later Vortec engine that does not have the in -block bypas passage, you must route a thermostat bypass hose from the water bypass port on the front of the manifold to the 5/8" hose nipple on the passenger side of the Vortec water pump. Use a 3/8" pipe to 5/8" hose nipple fitting, and a 7" length of 5/8" hose to accomplish this. If your engine block has the thermostat bypass passage, use the 3/8" plug supplied in the kit to plug the bypass port in the front of the intake manifold."




[Modified by neverendingproject, 2:57 AM 3/1/2004]
neverendingproject is offline   Reply With Quote
Old 03-01-2004, 12:16 AM   #11
American Boy
CF Senior Member
 
American Boy's Avatar
 
Member Since: Jun 2001
Location: Quebec
Default Re: Vortec intake & thermostat bypass? (neverendingproject)

I have a 1996 vortec block so in my case, the passage wasn't there. I didn't check if the heads had the passage, so it could be the block that causes that problem.

Stephan
American Boy is offline   Reply With Quote
Old 03-01-2004, 12:16 AM
 
Go Back   Corvette Forum > C3 Corvettes, 1968 - 1982 > C3 Tech/Performance
Reload this Page Vortec intake & thermostat bypass?
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
383 build what the heck am I doing? doublearrow C3 Tech/Performance 31 06-07-2013 11:12 PM
Help rebuilding sbc 400 wadedwyer C3 Tech/Performance 14 03-10-2013 10:47 PM
Vortec temp sender size?? bytor C3 Tech/Performance 12 12-04-2008 09:46 AM
do vortecs have straight or angled plugs? andylmusic76 C3 General 6 12-17-2007 01:30 AM
vortec intake with egr? joehalford01 C3 Tech/Performance 4 08-07-2007 03:12 AM


Tags
block, blueprint, bypass, carb, diagram, engine, external, hole, hose, intake, intakes, pump, thermostat, vortec, water


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 06:09 AM.


Emails & Password Backup