Page 2 of 2 FirstFirst 12
Results 21 to 29 of 29

402 ci S/C Vortec overheating

This is a discussion on 402 ci S/C Vortec overheating within the Forced Induction forums, part of the LSx Technical Help Section category; Some people have the same problems you do running dexacool. If thats what your using, try flushing out the cooling ...

  1. #21
    Junior Member
    Join Date
    Aug 2006
    Location
    arizona
    Age
    39
    Posts
    27
    Some people have the same problems you do running dexacool. If thats what your using, try flushing out the cooling system and use regular antifreez. If you already are, or that don't work, then i think you have one of them car gremlins.

  2. #22
    Junior Member
    Join Date
    Aug 2006
    Location
    arizona
    Age
    39
    Posts
    27
    ive heard of people having similar problems as you running dexicool. Try flushing out your cooling system and using regular coolant. If i don't work or you are using regular coolant, then you might have one of them car gremlins.

  3. #23
    BOSSONNOS
    Join Date
    Oct 2005
    Location
    AUSTRALIA
    Age
    44
    Posts
    41

    Turismo Blue
    2005 Holden 502rwhp

    Talking

    Woooohoooo found the problem, removed the blower belt and intercooler and found that the F%@*ing intercooler is too thick and restricting the air flow, ran it for 40 minutes at 1/2 throttle 3600 rpm in 5th and temp crept up to 230, backed the load off a little and temp came back down, Sweet, ordering another intercooler tomorrow. The intercooler was upplied with the blower kit and they knew what i was fitting it to, not happy but will have a 'friendly' chat with them in the morning

    Thanks for all the input people, I'll post up some pics when it's all finished with some dyno figures.

    Dave

  4. #24
    Junior Member
    Join Date
    Aug 2005
    Location
    florida
    Posts
    8
    2002ss

    Just curious on your car did you reinstall the plastic wind deflector on the bottom of the front bumper? This will cause the car to also run hot.

  5. #25
    BOSSONNOS
    Join Date
    Oct 2005
    Location
    AUSTRALIA
    Age
    44
    Posts
    41

    Turismo Blue
    2005 Holden 502rwhp

    Yep, we fitted the deflector and sealed off around the radiator so the air has to go through it instead of escaping around the sides.

    Dave

  6. #26
    someday joejenkinsglass's Avatar
    Join Date
    Oct 2006
    Location
    Iowa
    Age
    40
    Posts
    1,120

    green
    98 formula

    sounds like a timing issue to me or maybe the temp guage wire is on the exhaust, or maybe the guage is bad? maybe try a manual temp guage on the dyno most importantly dont work on it when you are pissed that just makes it worse good luck!!

  7. #27
    BOSSONNOS
    Join Date
    Oct 2005
    Location
    AUSTRALIA
    Age
    44
    Posts
    41

    Turismo Blue
    2005 Holden 502rwhp

    Well tried a new intercooler and worst luck, she's still getting hot. I really thought it was the intercooler that was the problem so guess what now..........yep the engine is coming out, the more miles we put on this thing the easier it is overheating. Not happy Will keep you posted.

    We don't allow alcohol on the premise so no chance of any one getting pissed while they are working.

  8. #28
    someday joejenkinsglass's Avatar
    Join Date
    Oct 2006
    Location
    Iowa
    Age
    40
    Posts
    1,120

    green
    98 formula

    so is it a customers vehicle? does it still have the crossover for the coolant? im sure its something small that is causing th problem my turbo car runs fairly cool actually cooler than my other nearly stock onelike i said before good luck

  9. #29
    Member tici's Avatar
    Join Date
    Aug 2005
    Location
    Zurich - Switzerland
    Age
    50
    Posts
    117
    1998 M6 vert TA

    There is a steel pipe on top of the engine (I don't remenber how it's called) to remove the air bubbles that accumulate in the heads.
    If it doesn't work properly the coolant won't flow properly.

    You measure the heads temperature. Is the coolant temperature as high as the heads?

    Have you tried without thermostat? Only with the housing?

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. S10 4.8 Vortec 5.7 LS
    By stempy in forum LSx Retrofit and Swap
    Replies: 19
    Last Post: 07-14-2014, 10:59 PM
  2. Vortec heads on non Vortec block
    By bradyhill1 in forum Internal Engine
    Replies: 0
    Last Post: 03-23-2013, 02:49 PM
  3. Vortec 350..
    By SeVeReDiStOrTiOn in forum Almost Anything Goes
    Replies: 19
    Last Post: 03-23-2009, 06:12 PM
  4. 5.3L Vortec
    By R_Yates69@Hotmail.com in forum Internal Engine
    Replies: 13
    Last Post: 03-11-2009, 11:04 AM
  5. 402 ci s/c Vortec overheating
    By BOSSONNOS in forum GTO
    Replies: 6
    Last Post: 01-08-2007, 07:08 PM

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
  •