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GMC G15 Freeze Plug

Helpful Tips to Solve the Common Issues of Your GMC G15 Freeze Plug

Always make sure that your GMC G15 freeze plug is properly installed and isn't corroded or cracked. Otherwise, you will have to quickly remedy these problems to avoid causing your engine to malfunction. Here are some useful tips to deal with the common freeze plug problems:

Rust and corrosion

The freeze plug on your car can get rusted overtime due to the corrosive quality of your antifreeze. Yes, believe it or not, the antifreeze that you have in your car can cause metal parts to corrode, that's why it's very important to replace the antifreeze every three years. Failing to do so will end up with a corroded freeze plug that will require a quick replacement. One way to prevent this is to get the brass-type freeze plug, which is non-corrosive unlike the steel type. You should also keep in mind that using water as substitute for antifreeze can also cause rust. So if you're guilty of using plain waiter, you had better drain it out and check your freeze plug before the rust spreads out. Also, it's better if you buy the antifreeze that is specified in your car manual so you can be sure that it won't quickly damage your component.

Wrong material

You have to be careful in choosing the material of the freeze plug you're getting. In fact, you may want to think twice in installing a rubber freeze plug on your G15 engine as the rubber may get easily burned out by the high temperature from your engine. That's why it's advised to just get either steel or brass freeze plug. But do take note of their differences before buying them. Also, you can ask your dealer for the most suitable material of the freeze plug for your GMC van.

Leaking coolant

You may find a puddle of coolant on the ground and automatically think that your coolant reservoir or the hoses are broken. But what you also need to consider checking is your freeze plug, which may have tiny cracks due to corrosion. When this happens, you just have to buy a new one, preferably brass, and make sure that it fits the hole tightly. However, if the leaking continues but you're sure that you have installed the new plug correctly, your engine block may have pin holes. Finding and fixing the source of the leak is the next best thing to do to prevent the engine from malfunctioning.

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  • Simple Tips to Give Your GMC G15 Freeze Plug a Longer Life

    If not given enough attention, the freeze plugs on your van can corrode and leak, giving you problems that may end up with a costly repair. To help you extend the life of your GMC G15 freeze plug, take note of these simple tips:


    Change coolant regularly.


    The coolant in your engine can be quite corrosive, so don't be surprised to find out that this can cause your freeze plugs to rust and corrode overtime. That's why you should replace your coolant regularly every three years to prevent your freeze plugs from corroding and causing leaks.


    Don't use plain water.


    If you've heard from someone that you can have water as alternative for your coolant, don't believe it. Using plain water will only rust your freeze plugs, which will require an immediate replacement to avoid coolant leaks. But in the event that you've already done what your friend had suggested, drain the water out right away and buy the most appropriate coolant for your car as indicated in the manual.


    Clean the edges.


    If you've just removed a couple of rusted freeze plugs from your engine block, chances are there will be rust debris and other contaminants on the edges of the holes. You should wipe these off using a cloth or you can use a good-quality wire wheel on the die grinder to clean these holes. Just make sure that you completely get rid of any debris before installing the new freeze plugs for more efficient cooling.


    Use a proper sealant.


    When you're replacing your freeze plug, you will have to use a proper sealant to prevent leaks. Remember to apply this around the edges of the freeze plugs you've just installed.


    Replace all plugs.


    Even if only one freeze plug got rusted or cracked, it's best to replace all your freeze plugs to avoid having another plug problem anytime soon. The reason behind this is that all of them were built and installed at the same time. So if one fails, it's safe to assume that the others will follow anytime soon.


    Choose the best material.


    If you want longer-lasting freeze plugs for your van, you're better off getting the brass freeze plugs instead of the steel and rubber ones. The brass freeze plug is non-corrosive unlike its steel counterpart and is definitely more durable and heat-resistant than the rubber material.