Hi peeps i want to know what makes the best result for your car when changing coolant, i hear of :

1) bleeding via thermostat
2) flushing via (radiator petcock bolt @ bottom)
3) draining from the engine block

I am just curious what are the differences? which one is optimum for best results...
and why are there so much plugs just to drain?

I know of

1) flushing via radiator bottom bolt

but i can't seem to find where the bolt is to drain from the block, I heard its near the oil filter, nor can i find where the thermostat is.

I would just like to know what does honda recommend doing out of the three ways.

I own a 5 th gen, (Base Model) if anybody can answer my questions it will be appreciated.

 

yah i really wish they made a device that picked up my whole car and just shook it till it all came out of one hole haha j/k... but seriously..

there are unfortunatley just a lot of places for the coolant to pool/collect when it's being drained out, to expect all the coolant to gravity feed itself back (past the pump mind you) to the one drain bolt at the bottom of the actual rad would be a lil ambitous. even after recently draining my rad I was still surprised how much was still left in the upper rad hose.

as for locations, the drain bolt for the block is as you mentioned on the back of the engine block - to the left (looking up from bottom) of the oil filter, it's prob gonna be a bitch to break it, and you'll prob want some some sorta hondabond or liquid gasket when you put it back in.

the thermostat (in housing) is (when facing the engine from the front) towards the rear of the valve cover on the left hand side, the bleed bolt sits on the housing it's a lil 12mm bolt with a lil vent hole, there will also be the thermostat SWITCH B plugged into it . - if you know where your egr is - it's in that area just a little lower, . if you are gonna drain via the thermostat you might as well replace it at the same time.

I don't think honda (atleast in the helms) recommends draining from 3 places - i think they just say the rad and the block... but i haven't flipped to that section in a while. either way you can't go wrong really, fluid will come out, and (hopefully) fluid will go back in.

best of luck.