Antifreeze and Engine Coolant
Radiators

How do you fix a leaking radiator petcock?

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2015-05-04 09:38:49
2015-05-04 09:38:49
Petcock FixHere are answers and opinions from FAQ Farmers:
  • First off, don't open a Durango petcock. If you already did there are replacement ones available after market. Another solution is to get it dry and silicone it in place, let it dry (24 hours), fill your system back up.
  • Plastic petcocks can be replaced by first removing the radiator from the vehicle. Now remove the stripped drain plug, then use an ice pick to remove the retaining clip inside the hole that the plug screws into (this is the part that usually fails). New plugs can be purchased at the dealer or NAPA....Next, unscrew the retainer clip from the new plug. Install the retainer clip and make sure it locks into place....be sure the retainer clip fits properly in the hole as each brand is different. In cases where the radiator is not the original, you may have to get a replacement drain plug from the aftermarket dealer that sells that brand radiator. Finally, screw the new plug into the hole using vaseline on the rubber gasket to help it seat tightly without having to overtighten the petcock. Better to leave it snug and then pressure test it for leaks and tighten it if necessary than to overtighten it. The stress from overtightening it may not damage it right away....it will fail when it gets hot a few times and under pressure....then it will dump all the coolant in a hurry. Something else to think about...usually this failure comes from overtightening or coolant contamination causing the plastic components to weaken and fail. Flush cooling system and check for oil or other contaminants.

If these petcocks are opened properly, there should not be a problem. Too many people just yank and twist on them causing unnecessary damage. If it does come out or leak, good old Teflon pipe tape works just finer.

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Related Questions


The 2003 Nissan radiator petcock is located on the bottom of the radiator. The radiator petcock will be in the center of the radiator bottom.

Replace the radiator with a new or good used one.

The water outlet, also called a petcock is located near the lowest point in the cooling system and is used to drain coolant from the engine. The petcock typically has wings, which are designed for better grip when turning the valve. If coolant is leaking from this point, it may be the petcock is partially opened and might need only to be closed completely to stop the leaking. The petcock is press-fitted into the bottom of the radiator. A leak around the petcock can be caused by a crack around the collar or a solder joint that has broken. Have a radiator shop pressure test the radiator to make sure there are no other problems with the radiator, such as other cracks. During a pressure test air is pumped into the radiator and then it is dunked into a water tank. Air bubbles escaping from the radiator indicate leak sites and will need to be repaired. --mark

Replace petcock with a properly sized plug Be sure you turned the petcock back in all the way. Try opening and re-closing petcock,may be some trash in it.On mine you have to push in on the petcock and turn it to re-seat it.

The petcock is at the bottom of the radiator on the drivers side of the car.

Replace radiator 1-800 radiator or 1-800radiator.com

The 2003 Chevrolet Cavalier radiator drain petcock is located on the bottom of the radiator. The drain will be towards the right side of the radiator.

The petcock on a 1989 Chevy Celebrity is at the bottom of the radiator on the drivers side.

Yes, crack it on the side and leave it to cool.

if your looking down on the petcock from the top of the radiator turn the petcock to the right to loosen it and to the left to tighten.

I would just leave it alone. Remove the lower radiator hose to drain and flush the radiator. You don't really need the petcock.

Assuming you mean the radiator petcock, no. The bottom of the radiator is probably loaded with crud or radiator sealer somebody put in.

Did you get the hose clamps tight? Did you puncture a hole in the bottom of the radiator? Did you get the petcock closed all the way? You didn't overtighten the petcock at the bottom of the rad did you? Is your water pump good? Did you put thermostat in the right way?????????????

Typically there is a petcock valve on the lower left side of the radiator, unscrew the petcock to drain the radiator. On radiators without a petcock, you would remove the lower hose to drain the system. (Quite messy!)

Petcock on bottom or radiator or remove lower hose.

Is there not a drain petcock on the bottom of the radiator?

To drain the radiator when it is time to change the coolant.

raise the hood and looking at the radiator, the drain petcock will be on your right hand side at the bottom.

It should be at the bottom, driver's side of the radiator on the engine side. It may be either a petcock or just a plain plug.

I'm assuming by petcock you mean the drain on the radiator. If it has one (which it should), It's on the bottom, rear, drivers corner of the radiator.

Remove and clean the petcock. Replace and if it still leaks, replace with a new petcock.

Normally on the bottom of the radiator. If none is there then remove the lower radiator hose to drain the radiator.

Open the petcock or remove the lower radiator hose from the radiator.

Answer:You want to see a picture of my petcock? I will show you mine if you show me yours. But my petcock is still a bit wild and not fully trained.........A petcock is a drain valve at the bottom of a radiator.


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