GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1

    Default 98 tahoe 5.7L Overheating but has plenty of water.

    this may or may not be a result of the intake manifold leaking? Need help!

  2. #2
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    What have you done as in repairs to this point.. we need a bit more information such as when it does it and when it is most likely to overheat etc...
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,612

    Default

    If you aren't losing coolant ,I would guess a thermostat sticking partially shut is more likely.BUT

    Check your oil-look for cloudy stuff-same story with coolant-look for oil.

    Check the oil and coolant as soon as possible- a intake manifold leak can contaminate the oil and kill your motor. The oil will be obviously contaminated-nothing subtle about it.

    Charlie
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  4. #4

    Default

    no repairs have been done, temp is normal when im driving down the road but then starts to climb when im at a stop. im thinking the water pump is going out too.

    ---------- Post added at 01:29 PM ---------- Previous post was at 01:27 PM ----------

    Intake manifold is leaking coolant, i am checking the oil often and it still looks the same as the day i changed my oil so there's no coolant leaking into the oil.

  5. #5

    Default

    idk if it's possible but i think my water pump is going out too?

  6. #6
    Legend
    murdog94's Avatar
    Join Date
    Feb 2008
    Location
    Cloquet, Minnesota, United States
    Posts
    8,198
    Blog Entries
    12

    Default

    I would change the intake gaskets and go from there.. With a leaking coolant it isnt possible for the system to pressureize properly, and the temp will rise when there isnt enough air moving over the rad. to cool the system.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  7. #7
    Legend
    Eddie Z71's Avatar
    Join Date
    Mar 2009
    Location
    Colorado Springs, CO
    Posts
    3,838
    Blog Entries
    1

    Default

    Hi, and welcome to the site!
    Eddie , 2000 Chevy Tahoe Z71 (old style)

  8. #8

    Default

    Thermostat is a cheap item to replace. Try that first.
    Pavement sucks... :grrrrrr:



    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs
    350cu.in bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

  9. #9

    Default Same Problem

    Hi,

    Just joined the forum.

    I just left my blazer parked the other side of town because I didn't want to move it.

    It was giving of steam when I opened the hood. It also had a strange rattling sound when I pressed the gas. The temperature went well past the red. There was plenty of coolant in the reservoir. I noticed a liquid leaking from under a silver cylinder for the refrigerant next to the reservoir. Is this waste water from the AC or something else?

    Thanks for any help.

  10. #10
    Legend
    stephan's Avatar
    Join Date
    Sep 2010
    Location
    Far West, Oregon USA,
    Posts
    8,606
    Blog Entries
    1

    Default

    Hey 98, welcome to the GM truck club. The strange rattleing noise you hear could be a lot of things, but when coupled with your engine overheating it could easily be the water pump failing. Try & localize exactly where the noise is coming from.
    The water you are seeing could just be condensate from the AC. This is normal, BUT you should feel it & see if it is fresh water or engine coolant. If it feels slick & slimey it is a coolant leak & probably coming from one of the heater core hoses, or possibly the coolant resivoir.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


Page 1 of 2 12 LastLast

Similar Threads

  1. overheating/coolent/water temp guage?
    By capt sensible in forum General Chevy & GM Tech Questions
    Replies: 7
    Last Post: 08-22-2010, 09:02 PM
  2. GMC Water Truck Chevrolet C7000 Diesel Stake Body Water Truck Nice
    By Steve in forum Chevy Trucks For Sale eBay
    Replies: 0
    Last Post: 06-17-2010, 04:10 AM
  3. Replies: 0
    Last Post: 01-30-2010, 02:10 AM
  4. 2003 tahoe water leak
    By bgloworm22 in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 3
    Last Post: 12-21-2009, 06:27 PM
  5. Water leak on '07 Tahoe
    By wswinford in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 1
    Last Post: 03-06-2007, 11:48 AM

Tags for this Thread

Posting Permissions

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