I've been reading around the web that only Honda brand coolant should be used
for the Honda. Tonight, for the first time, I noticed my 1995 Civic EX's
temperature gauge three quarters of the way to the hot setting, whereas it's
usually one quarter past cool. I'm going to check the reservoir and the
radiator today, but before I buy Prestone, I thought about heading over to
the Honda dealer for the Honda brand. How much does it usually cost in
comparison to Prestone? The car has less than 30k miles and never has had a
In the event that it's nearly dry, is plain distilled water ok to add? If
so, wouldn't that mean subsequently flushing the radiator so that the water
would be replaced by the antifreeze/water 50/50 mix?
Do not add Prestone. You risk an early water pump failure
OEM is something like twice as much.
Your owner's manual will tell you the 95 Civic is due for a
coolant flush every every 2 years or 45k miles, whichever
Re adding distilled water in a pinch: The more you have to
add, the greater the risk of improper cooling or breaking
something. The lower temperatures are when you add distilled
water, the greater the risk.
I am doubtful adding coolant will remedy the problem. Is the
thermostat original? Maybe time for a replacement if adding
coolant does not remedy the problem.
Every overheating incident brings your engine's head gasket
closer to failure in the future. I would not drive until the
correct amount of coolant is in place and/or other checks
How much of the antifreeze/water mixture will fill up the radiator and the
reservoir after a complete coolant flush?
I'm thinking of buying the Honda coolant from the dealer (unless there are
online places that sell it) and giving it to my mechanic for a radiator
flush. Is it sold in gallon jugs, and what is the general price?
A simple drain and fill (meaning you leave some of the old
coolant in the engine block, but you put new coolant in the
reservoir) will require about one US gallon of either OEM
pre mixed coolant. The exact figure depends on whether your
93 Civic EX is (1) Canadian or US; (2) auto or manual. See
your owner's manual, under "Capacities" in the index, or go
to https://techinfo.honda.com/rjanisis/logon.asp for a free
online owner's manual.
Note: I think there is a typo on the capacities page (page
186). Footnote 1 should say "Excluding" not "Including."
That's "Including" is what's in my 91 Civic's manual, and
only this makes sense.
The other posts have recent price quotes.
Buying it online generally cannot be done, since shipping of
fluids to your home directly is restricted or flat-out
I actually have used the orange Havoline anti-freeze in my
91 Civic since 2002, and all is well. It's said on the
packaging to be good for aluminum yada engines. Some here
say OEM is the only way to go. A few of us have been
experimenting with the Havoline and are happy. Experimenting
with Prestone or anything else is a no-no, AFAIC.
you don't have to go completely crazy, though. like plain water is
better than leaving it dry, temporarily. the antifreezes that sell
themselves as being compatible with hondas are probably reasonably ok,
as they wouldn't want to face class action suits. and if you do dilute
it with water a bit, it's not going to destroy the engine.
me, i try to stick with the honda stuff as much as possible, but the
last time it cracked a hose, it was friday pm of course, so i had to
fix it on saturday which meant a generic hose from poop boys, and a
quart or so of whatever coolant they sold that advertised as honda
compatible to refill it; i figure that it won't destroy the engine if
i leave it in till the next coolant change. which, with the thermostat
trouble, won't be too long. of course, it could be the coolant
destoryed the thermostat in a couple of months....
yeah though, like the other guys said, if it's overheating it's more
likely more than just needs coolant. even if it does need coolant. the
radiators on theese guys are tiny and it doesn't take a lot of clog to
make them need replacement. which isn't a big deal. but if you leave
it and it continues overheating, it will spring a head gasket leak.
hopefully that's not what's happening yet.
there are many causes of engine overheating.
- low coolant level, check both radiator and the reservoir.
- air in the cooling system. bubbles come out of the bleeding taps if
air is trapped in the system.
- fauty radiator fan: does it come on?
- stuck closed thermostat: does the upper hose ever get hot?
- faulty radiator cap: does the overflow tube get hot easily?
- faulty water pump: leave the cap off, does the coolant flow when
engine is running?
- blocked passages: same as above
- chambers detonation: (incorrect timing, incorrect spark plugs heat
range, mixture too lean) is there any audible pinging or rattling
- transmission overheating: (automatic trans) does the trans up/down
shift properly? does the torque converter lockup work?
if you live in the south, it's OK to fill it up with distilled water
(works for aluminum blocks & heads). i would prefer anti-freeze
because of its higher boiling point. In my Honda used PEAK LongLife
premixed 50/50, silicate-free, amber color, and added a bottle of
HyperLube super coolant as a surfactant, anti-foaming agent. They are
cheap and available at most parts stores
oh and dont overlook the radiator cap, one with a weakened spring will
lower the coolant boiling point. It's bad, cause when the coolant is
boiling, it's telling the egnine that "that's it, i can't take it no
more!!!". replaced with OEM only!!!
On Jan 13, 4:10 am, courseincivics@jfdsjlsjz wrote:
when all else is good, but the gauge tends to climb towards the H
mark, then the radiator cap is the top suspect.
in this case, i would also check the temp gauge sender (next to the
temp sensor) to make sure it's working right and doesn't send garbage
to the gauge!
i have no idea. some folks say it's green in color, some say blue. i'm
only sure it contains organic rust inhibitor instead of silicate,
which tends to form gel and has adverse effects the on water pump
seal, as mentioned by other folks here
My local Honda dealer now offers a coolant system service for $49 that
includes drain & refill (not flush) with Honda coolant, radiator cap
inspection, temp gauge operation inspection and water pump noise and
leaks checking. That sounds reasonable, yes? But the problem is that
they will probably try to talk you into replacing all of those parts
and while you're at it, why not the timing belt too.. haha. If you can
find similar deals, just make sure that what's got to be done is
last June, i read an article about a roundup of various brands of
additives. Hyper-Lube Super Coolant is among the top, tested on a
you can google for "cooling system additives" , it appears on
i drained the coolant by the amount of the bottle and added it to the
Honda dealers should have them, but often not in stock, they have to
order. You can order them yourself from a few sites that sell OEM
http://www.hondapartscheap.com is one of those
If you need coolant, you have a worse problem: There is a leak
someplace, like the water pump. While you're replacing the water pump,
you might as well replace the timing belt if it is due.
If there isn't a coolant leak, you need to diagnose the problem causing
the overheating, like a bad water pump or thermostat.
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