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  1. #1

    Default Is a small coolant leak from the intake manifold gasket an "emergency"

    I'm just wondering if this is something where I shouldn't drive the truck anymore until I get it fixed (because it might wreck something else?).

    It's a '90 5.7 suburban and it has a very small trickle coming from the back of the intake gasket.

    I'm keeping an eye on the coolant level, and will fix it when I get a chance, but thought I should ask ...

    Thanks.

    Ross.

  2. #2
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    murdog94's Avatar
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    Default

    I wouldnt because you never know when that small trickle will turn into a massive flood.
    Mike

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  3. #3
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    X2 on maybe turning into a flood, but the worse thing is, it could also be leaking inside into the oil,, & coolant ain't worth chit at lubeing those engine parts.
    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


  4. #4

    Default

    I have a 94 Silverado with a 5.7 , seems to also have a coolant leak along the intake manifold edge. Is this a common problem for the 5.7 litre motors? Mine has 236,000 mi. I am not seeing any coolant coming out, but when I wipe it up it pools up on top of the manifold in a couple days. I thought maybe it was the thermostat housing leaking, but the coolant is pooling up further down the manifold.Hopefully the manifold is not cracked?

  5. #5
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    94, try & follow the trail to the highest point. It could be the thermostst gasket & just running down to a lower area & then pooling. Wipe the thermostat gasket area with a white paper towell & see if you see the coolant color transfer to the towel.
    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


  6. #6

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    X3, leaks ownly get worse.

  7. #7
    Jr. Apprentice jt1200r's Avatar
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    a guy i know had a leak . it turned out to be the heater line at the intake. went to losen the nut and the metal tube was rusted thru
    87 r10 stepside

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