Question about 1994 Chevrolet Suburban

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I have a leak on the drivers side of the radiator. It is leaking where the cooling line goes into the top of the radiator. I actually looks like the bolt like apparatace that holds the threads on is leaking behind that part

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  • silvertipcns Aug 09, 2008

    That fixture is for the engine oil cooler in the tank portion of the radiator on the driver's side. There are little gaskets you can get to fix the leak, but be sure it is not leaking from a crack right above that piece between the hose and that oil cooler line. Very common in this model because of the plastic tank, and it is usually just a better idea to get a new radiator (from experience). I changed the gaskets for the oil cooler only to discover it was still leaking above it from a small crack.

  • dobermen2 Sep 03, 2008

    on drivers side at top of radiator where the oil line goes in is a small pin whole. The car was hot and the steam was coming out. Planning on flushing radiator and engine and putting new antifreeze since I have over 150,000 miles on it. Ofcourse after I fix the whole. This site helped me to know others having the same similar problem. Thanks¡¡¡

  • Anonymous Sep 04, 2008

    Same problem (94 Chevy Silverado Pickup). Cant see a crack anywhere just looks like it is seeping around the metal flange that buts up against the plastic. Gonna try the epoxy solution.

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Have the same problem. (94 Chevy Pickup) Leaking around the metal flange that buts up against the plastic. Gonna try the epoxy solution. Thanks.

Posted on Sep 04, 2008

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If it's a small leak, wait til the radiator is cold and you can seal the outside of it with JB Weld or another temperature-capable epoxy. If it's cracked badly, you'll need a new radiator.

Posted on Jul 26, 2008

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you have cooling lines that go from the trans to the radiator, you cant use stop leak cause its not the actuall radiator thats leaking, but good news the stop leak just help clog you radiator and cooling system to now give you more bigger problems in the future, but back to the problem at hand your coooling lines are leaking or the tank on the radiator is leaking, usually its the lines that go first

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You are leaking transmission fluid from either the fluid cooling lines that run from transmission to a separate reservoir in the radiator, or leaking from the reservoir itself. Hopefully, it's only the lines and may just need tightening to stop the leak.
There are two lines to the radiator's reservoir. One brings fluid from transmission to the reservoir, and a return line back into the transmission. Probably located on driver's side of the radiator, one will be near top of radiator, and one near the bottom. Small copper or steel lines that may also turn into rubber lines. Clean the area well with rags to locate the leak. Will probably need to have the car running to make it leak, while looking for it. You could also take a wrench and try tightening the fittings at the radiator, and tighten any rubber hose clamps that you see. If it's not the lines or hoses that are leaking, then the radiator may need to be pulled off for repairs or replacement. But 9 times out of ten, it is a leak from one of the lines.
When fixed, don't forget to check your transmission fluid level. Or keep adding till it is fixed.

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STEAM COMING OFF ENGINE


check top radiator hose goes to thermostat housing sound like its leaking if your engine leaking from left driver side on top of engine it has to be top radiator thermostat hose leaking.wait until engine cool down replace top radiator hose see if coolant leaking still occur if so you could have radiator leak.

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Creamy sludge found in radiator. When open the radiator expansion cap, creamy sludge found. Just do the top overhaul at workshop nearby. What may cause the problem? Thanks


Transmission fluid goes through the radiator to cool. The line could be leaking into the radiator as it goes through. Usually at the near the bottom is where the line goes in and comes out the other side.

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Transmission fluid & radiator fluid keeps getting low. know approx. where leak is, drivers side front on inside of front tire. would a leak in radiator cause trans. fluid to leak also from radiator?...


Your transmission fluid runs to your cooling system to cool the transmission oil. So, in answer to your question, one of the two transmission lines (one in, bottom and one out, top) could be leaking from the cooling system.

Bring your vehicle in for a cooling system pressure check. Another thing to keep in mind when inspecting leaks is that where you see the leak may not necessarily be where the leak is from. While the leak will drip down, the wind from when you're driving will splatter the leak all over the under-carriage of your vehicle making it look like leaks are happening where they in fact, are not.

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1 Answer

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Hit me up after u have check on these.

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