i am very mechanically inclinedHow long does it take to change head gasket in 1995 1.8 geo prizm?To do it properly, it will take a day or two. Once you remove the intake and exhaust manifold, the head will come off easily. But, you should take the head assembly to a qualified machine shop, who will clean it, heat it and reshape it, and then re surface it, so that it is not warped. The most common cause of head gasket failure is just one over-heating. Make sure that when you put things back together, you have thoroughly cleaned out the space between the radiator and the A/C condenser. Debris always collects here, and affects proper air flow and results in %26quot;hot%26quot; spots. Also, replace your coolant temperature switch, as a precaution. If the switch fails, the engine will over-heat, and you are back to square one. Don't forget to rent a torque wrench, and install the NEW head bolts in sequence. Buy a Haynes manual, it will help you. Good Luck!!How long does it take to change head gasket in 1995 1.8 geo prizm?The issue that determines how quickly the job can be
accomplished is not how mechanically inclined you
are, but how familiar you are with the particular car,
and how experienced you are in this type of work.
Another fact that can determine how fast you can
get the car running again is the reason that the
head gasket failed. The head gasket usually fails
when the head gets warped. This happens due to
an overheating of the engine. Unfortunately, with
the aluminum heads of today instead of the old
cast iron the aluminum head also develops cracks.
Aluminum is only used on cars today because of
the fact that it is cheaper than cast iron, and
the fact that the smaller engines of today need
all the weight trimming possible so that they
will seem to be a really quick little car. Weight
is a hindrance on a smaller car where on the full
size cars it isn't. An additional benefit to the auto
makers, and the dealers is that they can sell
eleven times more aluminum heads than they
ever have of the cast iron, and for a hugely
inflated price over the actual cost.
Most likely you will probably need a new
head as yours has probably developed the
fine, hairline cracks that will open up more with
driving. They cannot be seen, and therefore must
be checked by a good machine shop. There is
no real good way to fix these cracks in most
cases. The machine shop will tell you, though.
The actual task of changing the gasket/head is
not bad. Only your familiarization with that task,
and of the car will determine if it takes you one,
or two days, or three to five days. A real good
mechanic that is very familiar with your particular
car, has all the proper tools, and a spare head
(if one is required), can start in the morning, and
have it back on the road that same day. If a
spare head is not available, and the ability to
check the head properly is not available it must
go to a machine shop. That can take an additional
one or two days to complete the job. If the old head
is just put back on the car without the machine
shop testing, most likely the job will have to be
done all over again real soon. The problem with
hurrying is that more damage is done to the
engine so that a complete rebuild, or replacement
of the engine becomes necessary. That takes
even more time. The cost in time, and money is
very high. You could probably replace the car
for less.
A new head for the car can cost anywhere from
$300 to $700. A reconditioning of yours at a
machine shop could cost from $60 to $175. The
cost of a 'so called' factory reconditioned head
will be the same as a new one.
In doing the job you will need to take the time
to remove a lot of wires/harnesses, vacuum lines,
and water lines. Take care to insure just where
each goes. Then begin 'dusting your knuckles'
to take the head off the engine. You will need a
pretty fair set of good metric tools of both the
wrenches, and a socket set.
Take care in reinstalling everything. Be sure to
follow the torque settings for all the bolts/nuts.
Having a book on your car that gives you all the
particular specs, the tear down procedure, and
the wiring diagrams is a big help. You can get
a cheap book from most any auto parts store.
I always have books on every car I work on.
(and that happens to be four file cabinets of
four drawers each, and a large bookcase full.)
The best books you can get are terribly costly.
Those are the factory service manuals, and the
Mitchell Automotive series manuals. For the
information in these books your best bet is to
just go to your public library. You can't check
them out, but you can copy them there. You
can get two book pages on one 11 X 17 sheet
for a cost of ten cents each sheet. Most times
you can get all you need, much better copies,
and better diagrams than are printed in the
cheap books. The cost for these copies to
cover most everything you need will be from
$1.00 to about $10, depending upon just
how much of a 'book' you want.
In any event, just be prepared for the possibility
that you will need to replace the head. Check
for one from a salvage yard, but plan to have it
tested before installing it. Most yards will allow
to exchange it if it is also bad, but it can cost
you more time in completing the job. The time
spent at this point might be more than you
wish, but the cost savings over having to do it
all over again is great.
Good Luck!
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