Olds 307 Heater lines.
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 10 of 10
5.0 and 5.7 Discussion, Olds 307 Heater lines. in Cadillac Engine Technical Discussion; Hi all, I'm currently a bit confused when hooking up all my coolant lines. It seems like I'm left with ...
  1. #1
    Slacker is offline Cadillac Owners Fanatic
    Automobile(s): 1987 Cadillac Fleetwood Brougham
    Join Date
    Jun 2008
    Posts
    125

    Olds 307 Heater lines.

    Hi all,

    I'm currently a bit confused when hooking up all my coolant lines. It seems like I'm left with one extra. I found this picture online but can't figure out where the hoses are routing to. I'm talking about the two fittings that come out of the passenger's side of the engine. One (boxed in green) is by the distributor and the other comes out of the block. (Boxed in red).

    Thanks!


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    creeker is offline Cadillac Owners Connoisseur
    Automobile(s): 1992 eldorado. 2007 dodge magnum hemi r/t
    Join Date
    Nov 2005
    Location
    roberts creek b.c. canada
    Posts
    3,013

    Re: Olds 307 Heater lines.

    Quote Originally Posted by Slacker View Post
    Hi all,

    I'm currently a bit confused when hooking up all my coolant lines. It seems like I'm left with one extra. I found this picture online but can't figure out where the hoses are routing to. I'm talking about the two fittings that come out of the passenger's side of the engine. One (boxed in green) is by the distributor and the other comes out of the block. (Boxed in red).

    Thanks!

    I used to have a 88 buick electra with a 307,I dont remember a hose like in the red box,what kind of car is this?

  4. #3
    creeker is offline Cadillac Owners Connoisseur
    Automobile(s): 1992 eldorado. 2007 dodge magnum hemi r/t
    Join Date
    Nov 2005
    Location
    roberts creek b.c. canada
    Posts
    3,013

    Re: Olds 307 Heater lines.

    I seen one of your posts that you put a 307 in your 82 dvl.Maybe post this in your bio.

  5. #4
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,497

    Re: Olds 307 Heater lines.

    What you have highlighted is the AIR hoses, not heater hoses.

    The heater hoses connect to the water pump, should have a loop and clipped to the choke housing and go to IIRC the firewall or heater control valve and then firewall.

    You can follow the 2 hoses, one FROM the water pump and one TO it, there is a heater control valve (to help keep heat out of the car when warm out and heater is not commanded).

  6. #5
    Slacker is offline Cadillac Owners Fanatic
    Automobile(s): 1987 Cadillac Fleetwood Brougham
    Join Date
    Jun 2008
    Posts
    125

    Re: Olds 307 Heater lines.

    Quote Originally Posted by N0DIH View Post
    What you have highlighted is the AIR hoses, not heater hoses.

    The heater hoses connect to the water pump, should have a loop and clipped to the choke housing and go to IIRC the firewall or heater control valve and then firewall.

    You can follow the 2 hoses, one FROM the water pump and one TO it, there is a heater control valve (to help keep heat out of the car when warm out and heater is not commanded).
    Thanks for the info! I figured the one off the side of the block was an AIR line. I wanted to verify that because I have a hose coming off the back one with no place to go. The one by the distributor does spray coolant out of it though. (Had it routed to the reservoir and it filled it up within 10mins and started overflowing).

    Also the water pump only has one heater outlet, there's no return to the pump. Does the return just go straight to the radiator?

    Thanks again.

  7. #6
    Slacker is offline Cadillac Owners Fanatic
    Automobile(s): 1987 Cadillac Fleetwood Brougham
    Join Date
    Jun 2008
    Posts
    125

    Re: Olds 307 Heater lines.

    Quote Originally Posted by creeker View Post
    I used to have a 88 buick electra with a 307,I dont remember a hose like in the red box,what kind of car is this?
    I believe I got that picture from eBay motors. I think it was a Toronado with a 307. It was the only picture I could find that you could somewhat see what I was referring to. Sorry for any confusion.

  8. #7
    Slacker is offline Cadillac Owners Fanatic
    Automobile(s): 1987 Cadillac Fleetwood Brougham
    Join Date
    Jun 2008
    Posts
    125

    Re: Olds 307 Heater lines.

    Here is a more exact image of the line in question. It comes right off the rear of the manifold. (Boxed in red)



    Thanks again for all the help.

  9. #8
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,497

    Re: Olds 307 Heater lines.

    And as always, be careful with Toro's, they are unique often the in Oldsmobile world.... There was always some exclusive things they got over regular Olds engines. Distributor parts often come to mind (they had some "backwards" parts, but it was all that way, so they just had to match)

    Quote Originally Posted by Slacker View Post
    I believe I got that picture from eBay motors. I think it was a Toronado with a 307. It was the only picture I could find that you could somewhat see what I was referring to. Sorry for any confusion.

  10. #9
    Slacker is offline Cadillac Owners Fanatic
    Automobile(s): 1987 Cadillac Fleetwood Brougham
    Join Date
    Jun 2008
    Posts
    125

    Re: Olds 307 Heater lines.

    Quote Originally Posted by N0DIH View Post
    And as always, be careful with Toro's, they are unique often the in Oldsmobile world.... There was always some exclusive things they got over regular Olds engines. Distributor parts often come to mind (they had some "backwards" parts, but it was all that way, so they just had to match)
    Interesting, is this because they are FWD?

    By the way, fixed the problem. The port that looked like it was going from the manifold actually went through it to the block. It was the heater valve. I put the vacuum line to the back of it and hooked it to the one side of the heater core lines. The other line I sent to the water pump. I had an extra spout on the radiator that I plugged. (I'm guess from differences between the ht4100 that was in the car and the 307 that's in it now.)

  11. #10
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,497

    Re: Olds 307 Heater lines.

    Oddly, not neccessarily. The Toro's were top of the line. They got things the other lesser Olds didn't get. Sometimes we don't know why.

    They got often more HP/Torque. Like a W30 455 was 375 hp and 500 lb/ft torque. The W34 Toro version was 400 hp.
    They got special stuff inside, better parts, balancing was better.
    Sometimes it was for the FWD, like the lower intake to fit under the hood.

    One I know for sure, there are 2 HEI coils, red/white wires and red/yellow. Ok, what is difference? I dug, I found out....All Olds got red/white but Toro's got red/yellow.

    The coils are wound for the rotation of the distributor, the polarity of the coil output will be "backwards" if it is induced by the pickup coil in the bottom of the dizzy if it turned around. But wait you say, how could this be? Well, there is 2 pickup coils too.

    So Olds got red/white and the corresponding pickup coil. So did Pontiac too.
    Chevy got the red/yellow coils as did Cadillac and Buick and the same pickup.

    But there is a different pickup coil, so Toro got both the red/yellow coil and the pickup coil that was for the Toro's. So it could use it.

    Why? I have no idea.... Call it exclusive to Toro.....

    I'll have to dig up the details, it was interesting....

    but the coil is wound a certain way and the pickup coil that activates it is wound a certain way, so when the reluctor would go by, it would go + then -, so the coil would respond that way with its output. If you turn the dizzy backwards the coil output is reversed, the pickup coil goes - then +. So Toro got the backwards coil and a backwards pickup coil so it all acted correct.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting