How to Fix a Head Gasket Leak in Your Car

Rev up your engines! [MUSIC PLAYING] It’s time for scottykilmer.com When a customer comes
to me with a car that has an engine with a
leaking head gasket, I tell them they
have two choices. They can either have me pull
the head off of the engine and replace the head gasket
and any other damage that’s done inside, or
they can try putting a seal into the radiator and
hoping that fixes the leak. Now, I don’t mind
taking the engine apart because that’s a big job,
and I’ll make a lot of money, but some people don’t
have that kind of money lying around these days. Replacing a head gasket
on a modern day car can cost well over $1,000. So sometimes, my customers
opt to try a sealer, and in that case,
I use Steel Seal. Now, it’s a little bit more
complicated than just pouring it into the radiator,
so I’m gonna show you how to do it correctly. To begin with, you want to have
clean coolant in your radiator. If it’s dirty, flush it out
and put in new, clean coolant. Then, you want to
take the two bolts off the thermostat housing
and take the thermostat out. With the thermostat
removed, the sealant will flow better
and have a better chance of sealing the leak. So you just bolt the
thermostat housing on without the
thermostat inside it. Now, this Toyota head gasket
leak is using a lot of coolant. So it’s a good idea to
check all the spark plugs to see if any of them
are burning the coolant. So take the spark plugs off
one at a time and check them. Pull them out and look at them. And in this case, the
number two spark plug is covered in antifreeze. Now, the other three
spark plugs are fine, so we know the leak is at
the number two cylinder. So here’s a trick I do all
the time to help the sealer work better– I leave that number
two spark plug hole empty with no plug in it, and I
also unplug the number two fuel injector so it doesn’t fire. Then, I get the Steel Seal
and pour it in the radiator. Then, I start up the car. Now, it’s gonna be
making a lot of noise because there’s no
spark plug in the hole, but that keeps the
pressure out of that hole so the sealer can work better. Then, you let the engine
idle for about half an hour and let the sealer do its thing. Then after half an hour
of running, shut it off. Then, let the engine cool
down for about half an hour and repeat this process
four or five times. And when you’re
finally done, let it dry overnight with the
spark plug out of the hole. Then, the next morning,
put the spark plug back in and take her for a spin. Now, you want to baby the
car the first 100 miles of driving after
using the sealer to give it a better chance
of setting itself up. And in this case, the
sealer worked fine. There’s no more
head gasket leak. Now, unfortunately,
some head gasket holes are just too big for any sealer
to work, but in many cases, I feel that it’s the best first
option, because tearing down an engine is an expensive job. And I’ve seen Steel Seal
work in many cars I’ve put it in over the last two decades. And remember, if you’ve
got any car questions, just visit scottykilmer.com,
and I’ll answer them as soon as I get
back from this ride. [MUSIC PLAYING]

Bernard Jenkins

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