Results 1 to 7 of 7

Thread: Overheating with AC on

  1. 8th August 2009, 04:11 PM #1
    TheLowRanger Guest

    Overheating with AC on

    I own a 97 V8 D1 and have never had any overheating issues in the 4 years I have owned it. This arvo, running back in to town, it was warming up (mid 30's) so I flicked the AC on. I noticed as soon as I turned it on the temp started to rise. I turned it off and pulled over and it immediately returned to normal. As I drove the rest of the way home it was fine, so I put the AC back on and straight away it started to heat up again. Turn it off and it goes back to normal. Also, in the last couple of weeks I have been getting a very slight squealing sound under load when the revs increase. Have thought this may be a slightly loose fan belt but get nothing when I rev the motor in neutral. It only happens under load/hard acceleration. Could this mean that the tensioning pulley is kaput and needs to be replaced? Are these issues related? As in, when the AC goes on the belt is slipping with the extra resistance and stopping the fan from working properly? I'm just letting the car cool down now before I start to investigate. The radiator has been flushed and refilled with OAT coolant only a couple of months ago so should not be a problem. Any thoughts on this would be appreciated.

    Cheers

    Glen
    Reply With Quote Reply With Quote
  2. 8th August 2009, 04:27 PM #2
    scarry's Avatar
    scarry
    scarry is offline Swaggie
    Join Date
    Apr 2008
    Location
    Brisbane,some of the time.
    Posts
    13,888
    Total Downloaded
    0
    Does it have an electric fan on the radiator,if so is it going?

    The belt squeal maybe because the fan is not operating & also causing high head pressures in the ac system.


    If fan is going,check direction is correct.
    Reply With Quote Reply With Quote
  3. 8th August 2009, 05:07 PM #3
    TheLowRanger Guest
    Cooling system is standard so the engine fan is the viscous fan.
    Reply With Quote Reply With Quote
  4. 8th August 2009, 05:38 PM #4
    PAT303
    PAT303 is offline OldBushie
    Join Date
    May 2007
    Location
    Safety Bay
    Posts
    8,041
    Total Downloaded
    0
    Your cooling system is well overdue for a good clean-out if it hasn't been done,start there.It is common for the A/C to cause overheating on all types of vehicles,a hot day strains the cooling system and the extra load from the A/C push's it over the edge. Pat
    Reply With Quote Reply With Quote
  5. 8th August 2009, 06:53 PM #5
    TheLowRanger Guest
    Hopefully fixed the problem. Partially removed the radiator and there was a nice collection of crud caught up between the radiator and the condensor. Cleared it all out now and will take it for a run tomorrow to see if the problem is solved. BTW Pat, every day is a hot one up here. I just haven't run the AC for a few months.
    Reply With Quote Reply With Quote
  6. 9th August 2009, 10:20 AM #6
    JamesH Guest
    I had this trouble too I ended up recoring the radiator but a good part of the problem was poor earthing as well.
    Reply With Quote Reply With Quote
  7. 9th August 2009, 10:24 AM #7
    PAT303
    PAT303 is offline OldBushie
    Join Date
    May 2007
    Location
    Safety Bay
    Posts
    8,041
    Total Downloaded
    0
    Do yourself a big favour,spend $250 and get it rodded.It's giving you a hint. Pat
    Reply With Quote Reply With Quote
« salisbury diff into 2a | V8 D1 Air flow meter »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!