Replacing 472 With 500 in my 1968 SDV - Page 3
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
Page 3 of 3 FirstFirst 1 2 3
Results 31 to 45 of 45
500, 472, 425, 368 Discussion, Replacing 472 With 500 in my 1968 SDV in Cadillac Engine Technical Discussion; Originally Posted by drmenard Looking Good....Make sure you give that HEI distrubtor a new wire.. and don't use the old ...
  1. #31
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    Quote Originally Posted by drmenard View Post
    Looking Good....Make sure you give that HEI distrubtor a new wire.. and don't use the old resistor wire ...

    There is a large red (maybe 10ga) wire coming out of the distributor. That is what you are talking about right? I just run that to an +12v ignition source? And I can cut and cap off the 2 wires that went to the old coil from the points distributor?

  2. #32
    drmenard is offline Cadillac Owners Enthusiast
    Automobile(s): 95 fleetwood 81 deville
    Join Date
    May 2003
    Location
    Massachusetts
    Posts
    974

    Re: Replacing 472 With 500 in my 1968 SDV

    That sounds right with the wires.....What a lot of guys do to get rid of there air pump and give the clearance for the fan belt at the distrubtor cap is use a 425 pulley set -up... most all 425's, except Cal cars, have no air pump...on those cars the a/c compressor-PS pump belt are just one larger belt... that gives the needed clearance for the HEI....but if you did that you would have to change the ps pump or pulley ...same with the AC comp.

  3. #33
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    Everything is finished. But now I don't know the order of the distributor cap. I started with where the rotor pointed and went around clockwise from that point in the listed firing order. (1-5-6-3-4-2-7-8).
    No luck. also i have a fuse block that distributes power to the starter,alternator, and the fuse block, but when the engine is cranked it blows a 200A fuse. No idea where that problem is coming from. does anyone have and ideas?

    also does anyone know the order and what pin is #1 on the HEI distributor?

  4. #34
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    OK, so I had a little bit of a "rain man" moment and was 180* out on my distributor cap order. The motor fired right up and runs so smooth. I cant believe how much power I was missing before.

    Here are some pictures of a semi finished engine bay. I still need to paint the fenders and random other parts. So that is my next project along with a firewall cover....








  5. #35
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 FWD fleetwood, '93 fleetwood Bro
    Join Date
    Mar 2009
    Location
    mich
    Age
    82
    Posts
    726

    Re: Replacing 472 With 500 in my 1968 SDV

    That looks like you did good!! A nice conversion.

  6. #36
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    Thank you, I learned a lot while doing this. And even though I spent way more than I was expecting im glad that I redid all the suspension bushings and joints while I was in there. It makes a huge difference.

    Does anyone know if I can bypass the heater valve and just run a straight piece of heater hose from the heater core to the radiator?

    I would like to get rid of that valve.

    I can't, for the life of me find where the other two vacuum lines are that go to the side of the valve... and the only place that is missing lines is a little distribution tree to the left of the mode door canister.

  7. #37
    BRICKS is offline Cadillac Owners Fanatic
    Automobile(s): 79 coupe deville d'elegance (76k og), 84 coupe deville
    Join Date
    Aug 2007
    Location
    Black River Swamp to VA
    Age
    29
    Posts
    114

    Re: Replacing 472 With 500 in my 1968 SDV

    nice swap! hopefully mine will turn out as well as urs. good job.

  8. #38
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    Quote Originally Posted by BRICKS View Post
    nice swap! hopefully mine will turn out as well as urs. good job.
    Thank you, all I can say is take your time and ask a bunch of questions on here, that's what helped me. Everyone on here is knowledgeable and it helps.

  9. #39
    BRICKS is offline Cadillac Owners Fanatic
    Automobile(s): 79 coupe deville d'elegance (76k og), 84 coupe deville
    Join Date
    Aug 2007
    Location
    Black River Swamp to VA
    Age
    29
    Posts
    114

    Re: Replacing 472 With 500 in my 1968 SDV

    Quote Originally Posted by 01devilledts View Post
    Thank you, all I can say is take your time and ask a bunch of questions on here, that's what helped me. Everyone on here is knowledgeable and it helps.
    if they'll respond to my topic...

  10. #40
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    Bump....

    Anyone know if this is possible?

    Quote Originally Posted by 01devilledts View Post
    Does anyone know if I can bypass the heater valve and just run a straight piece of heater hose from the heater core to the radiator?

    I would like to get rid of that valve.

    I can't, for the life of me find where the other two vacuum lines are that go to the side of the valve... and the only place that is missing lines is a little distribution tree to the left of the mode door canister.

  11. #41
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 FWD fleetwood, '93 fleetwood Bro
    Join Date
    Mar 2009
    Location
    mich
    Age
    82
    Posts
    726

    Re: Replacing 472 With 500 in my 1968 SDV

    Of course you can eliminate that valve, but the heater core will be hot all the time. I believe you could just keep looking for that vacuum line that operates it, even if you remove the valve. That hose likely originates at the heater controls, behind the dash. Most Caddys I've owned had a removable top on the dash, which gives access to all that "stuff"

  12. #42
    drmenard is offline Cadillac Owners Enthusiast
    Automobile(s): 95 fleetwood 81 deville
    Join Date
    May 2003
    Location
    Massachusetts
    Posts
    974

    Re: Replacing 472 With 500 in my 1968 SDV

    I believe there is only one vacume hose going to that valve... Not sure on that year , but vacume will open the valve or close the valve... those other spots may just be vents.....Don't that the valve off unless you live in the artic circle....

  13. #43
    01devilledts's Avatar
    01devilledts is offline Cadillac Owners Fanatic
    Automobile(s): 68 Deville,04 XLR,94 2dr &97 4dr tahoe,67 lincoln,98 jeep xj
    Join Date
    Dec 2004
    Location
    Glendale, Arizona
    Age
    32
    Posts
    385

    Re: Replacing 472 With 500 in my 1968 SDV

    I guess here's my answer



    I dont have the "Time Delay Relay" I wonder where I can find that?

    I guess the HVAC system is my next project.

    I have all new parts installed and A/C works but I have not tried to get the heat to work. I mean it gets cold here for maybe 2 months out of the year so i never worried about it. (its actually 75 while im typing this at 7pm)

  14. #44
    cadillac_al is online now Cadillac Owners Connoisseur
    Automobile(s): Cadillac 78 Seville, 78 Coupe de Ville, 92 Sedan de Ville
    Join Date
    Feb 2007
    Location
    Maine
    Age
    52
    Posts
    2,710

    Re: Replacing 472 With 500 in my 1968 SDV

    The previous owner of my Seville bypassed the heater valve and put a manual valve in the hose that can be opened or closed. I never bothered to change it and just turn it on in cold weather (no winter for this baby) and off in the summer.

  15. #45
    Dirtywaterdiver's Avatar
    Dirtywaterdiver is offline Cadillac Owners Fanatic
    Automobile(s): 1968 Convertible
    Join Date
    Jul 2010
    Location
    Boston MASS
    Posts
    264

    Re: Replacing 472 With 500 in my 1968 SDV

    So, can somebody tell me how the heater core is plumbed? My manual is silent on this.

    The hose from the radiator, goes where? Through the heater valve and to the...?

    The passenger head gets routed to the...?

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