overheating civic esi

[monks]

civic esi overheats at high rpm (cruising at 100+ kph), confirmed by water loss,  but temperature goes down when speed minimized and goes to normal level when parked at idle.  just replaced thermostat/thermoswitch.  rad fan working. why kaya? thanks

[green]

napalinis o flush mo na yung radiator? naka advanced timing ka ba?

[monks]

sinipag ako kanina, tinanggal ko ung radiator para linisin ang fins, thought of having it checked by a radiator shop.  barado na pala so pinalinis ko pero malas dahil nabali naman drain plug. hope OK na pagna-test ko.  thanx!

btw, yung panghalo sa coolant bukod sa distilled water, pwede na ba yung purified water?

napalinis o flush mo na yung radiator? naka advanced timing ka ba?

[RS_Sprint]

I've heard on local Honda SiR's that there is an electrical problem that surfaces after a few years of use due to corrosion/melting sa wires and connectors. Parang nagloloko yung fan, doesn't funtion properly and it is intermittent, kaya hard to trace.

I'm not sure if this problem is confined only to SiR's, baka its the same rin in your case.

[-jason-]

if after cleaning ng radiator ,your car still overheats, it could already be your cylinder head gasket. happend to me before, my car overheats when driving at high rpm's then the temp goes to normal when idle.

[SuPeR_MaN]

if after cleaning ng radiator ,your car still overheats, it could already be your cylinder head gasket. happend to me before, my car overheats when driving at high rpm's then the temp goes to normal when idle.

pag nauubusan ng tubig, most probably cylinder head gasket. you can check it if its the head gasket. you open the radiator cap then revv the engine. if water comes out of the radiator, im sure its cylinder head gasket.

check also your water pump, thermostat, thermoswitch, and auxiliary fan. others will suggest to have the fan connected as "rekta" which is wrong. mauubos ang carbon ng auxiliary fan which lessens its life. HTH!

[hanson]

It doesn't have to be the cylinder head gasket.  I used to experience this with our liteace.  I only changed the radiator cap.  There's a rubber gasket in the cap that wears out due to age that causes the leak.   You'll end up looking for the leak but over look this problem.

With regards to radiator, use only distilled water and coolant, mixed 50%/50%.  using other types of water can cause scalling inside your radiator tubes that will clog the system.

If you have plastic type tanks specifically DENSO brand, bring it to our shop so we uncrimp and crimp the tanks properly.  We have tools for that.  

Best Regards,

Hanson
DENSO Diesel and Radiator Services QC
by RDH Diesel Technologies Inc.
88 Banawe St., Tatalon, QC - front of Children's Med
732.27.86 / 415.77.01

[Adrian]

OT, can i put 100% coolant in my reservoir? or distilled water is a must?

[clyde]

OT, can i put 100% coolant in my reservoir? or distilled water is a must?

I've been using 100% coolant(GM's AC Delco Green- for aluminum blocks; and NOT the Red one-for cast iron blocks) both on radiator and reservoir on my D15B3 civic ef engine for the last 5 years and never had a problem with the engine's cooling system. well, except of course when i had my radiator fan motor as well as the auxialiary fan mulfunctioning but with regards to the internals of both engine and radiator, nothing so far.

the climate here in the middle east is usually from 36-51 deg. celsius and with your ac all the time at #3, well i think the engine really needs some cooling under the bonnet.

[hanson]

no.  you should mix 1:1.  you should use distilled water.  distilled water doesn't have minerals.  it is the mineral particulates in the water that hardens and scales the tubes of your radiator.

putting 100% coolant is as bad as that.  i haven't really seen a car with 100% coolant but according to our service advisor at DENSO, it can also harden.  you will see the instruction saying you should mix this 1:1.

i recently saw someone filling up his mazda with tap water.  i told him that it is bad.  he's response?  insisting...  "ok lang iyan, ang tagal ko nang ginagawa yan"  with disagreement.  i quietly went away... 'bahala ka, tinutulungan ka nalang'

our shop once received a daewoo radiator.  it's big as hell unlike the civics and corollas.  you wouldn't even think that it's for a car.  the driver wanted us to overhaul it.  

when we opened it up and started overhauling, we found out only 3 tubes were working!  no wonder it overheats.  the cause?  using TAP WATER.  that's as bad as it gets.

regards,

hanson