Cooling Problems - Page 3
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

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 123
Results 31 to 32 of 32
HT4100 4.1, 4.5, 4.9 Discussion, Cooling Problems in Cadillac Engine Discussion; bbobynski; Thanks for the tips. I think my cooling problem was a false full level in the radiator. This car ...
  1. #31
    Hot4.1 is offline Cadillac Owners Member
    Automobile(s): 1982 4.1 DeVille Hearse
    Join Date
    Dec 2003
    Location
    Tampa
    Posts
    31
    Thread Starter

    QuestionRe: Cooling Problems

    bbob;

    Thanks for the tips. I think my cooling problem was a false full level in the radiator. This car needs two people to top off the radiator - One to pour coolant while another revs the engine to 1500 rpm. Will know for sure this summer in Houston.

    Next problem - it doesn't pass emissions inspection. First it failed for hydrocarbons and NOX. I put on a catalytic converter. Now it fails only NOX. O2 sensor shows proper voltage on the computer readout. I banged on the EGR valve with a hammer (like it says in the manual) and plugged the vacuum line from the air cleaner into it - it killed the engine immediately - so I don't think it is stuck. Can't reach the bolts to take it out - need a double-jointed knuckle wrench.

    I can't detect a vacuum coming from the EGR vacuum solenoid switch. This switch is a $150 item. I checked it after the engine was heated up, many times. Never pulled a vacuum. The vacuum line between the switch and the EGR valve did have splits in it, I replaced the line, but I would feel more confident if I knew the switch was doing its job.

    I tried the "Guaranteed to Pass" additive - it failed.

    Might need a tune-up, but it runs real smooth. What is the trick to getting to that back row of spark plugs on the sideways engine?

    The continuing saga of the Hot 4.1.


  2. #32
    shredder130's Avatar
    shredder130 is offline Cadillac Owners Fanatic
    Join Date
    Feb 2004
    Posts
    182

    Re: Cooling Problems

    no real trick, i just used a short extension, changing the plugs was one of the first things i did when i picked mine up

  3. Remove Advertisements
    Cadillac Forums
    Advertisements
     

+ Reply to Thread
Page 3 of 3 FirstFirst 123

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

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

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

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
  •