Question about 1998 Chevrolet C1500

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My 1998 Chevy Silverado has coolant leaking from the radiator at the small metal fitting at the top drivers side of the rad. Is the a seal that can be replaced or does the entire rad need to be replaced?

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There's not usually a seal for these, the metal is commonly molded into the plastic sides of the radiator.. Remove the radiator tube and inspect the plastic around the fitting for cracks. If you find cracks in the plastic, then you know your answer. If it's leaking from around the radiator hose you could try replacing the clamp with a hose clamp that you can tighten with a screw driver.

My guess is the plastic is cracked there, and the radiator needs replaced, but you should inspect it first of course.

Good luck

Posted on May 09, 2010

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1 Answer

Leaking coolant but not overheating


Can you identify WHERE it is leaking from? Is it just a slight dribble and a bit of steam, of a major leak where it is running out?
If it is from the rubber hoses or near the clamps? Your vehicle is quite old and the upper/lower radiator hoses may have to be replaced. A fairly simple loosening of hose clamps with a screwdriver or with a pair of pliers and then just levering them off their housings.
But first get a large sheet of cardboard or plastic and a shallow pan to catch the coolant as you let it drain. Let the engine cool first... test if the internal pressure has gone down by squeezing on the upper radiator hose... if it is easy to squeeze then it is safe to drain and empty the radiator with the little winged tap that is just on the lower, inside of the radiator. Loosen the radiator cap to allow air to enter the system and let the coolant flow out. (Careful with pets... they seem to love drinking the coolant... but it is poison!)
You can now change the upper/lower rad hoses and heater hoses and maybe a short by-pass hose.
IF the leak is just a minor seepage from the radiator or inside the heat core (you likely can smell the vapours of the steam of the leaking coolant inside, the likely cure is to my some "radiator stop leak" from an auto supply store. Follow the directions on the bottle, but most have a syrupy liquid and little metal pellets. You open the radiator cap (when it is cool or depressurized) then add the small bottle of radiator repair solution. Put the rad cap back on and then you have to go for a reasonably long drive (usually 30 minutes or so) to heat up the pellets and have them "melt" as little flecks of soft metal in the solution. The idea is that as the coolant attempts to leak out... these little metal flecks block the leak.
IF you have the coolant totally dumping out and it is not a leaking hose, it may be the water pump and seal. I think I'd suggest that you get a mechanic to deal with that.... it is not an easy task for a DIYer !
I sincerely hope this helps. Please let me know...
/denis

Dec 15, 2010 | 1995 Chevrolet Caprice

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1998 Isuzu rodeo running hot. filled radiator & reservoir with water & coolant. There is a oily substance dripping from small hose at the bottom of radiator, dont see any water leaking. Just had...


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Water pumps can and do leak one minute then seal themselves.
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1 Answer

Coolant leak on chevy silverado. what is the


Check you return/ coolant bottle to see if the hose is not well fitted. Else you might need to change your radiator.

Rate this.

Good luck

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1 Answer

Need help to change thermostat in 1998 Chevy 2500 pick up


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1:drain the radiator(there is a drain **** at the bottom of the radiator protrudes from rad looks similar to a wing nut)
2:Remove the two bolts in the thermostat housing(there may be some nuts holding some ground wires there that you have to remove before you can remove the thermostat housing bolts)
3:remove the housing ...........note: make note of the position of the thermostat before removal.
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1 Answer

Replacing the radiator system for nissan altima 1998


Drain coolant from the cooling system. White plastic drain plug in bottom of radiator.

take off bottom rad. hose and top rad hose.

All wrenches and sockets are either 10 or 12 mm. Remove air shroud from around radiator and fan.
Sometimes its easier to remove fan too.

If its an automatic, remove 2 rubber hoses at bottom of rad.

remove 4 bolts top and bottom that hold rad. in place.

reverse order of parts. Fill with coolant and check for leaks.

That is the basics of it.
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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...


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