G-05 in Asian Car

[jtfmdyk]

Originally Posted By: nthach
Originally Posted By: rszappa1
Where is it. I have a 2007 service book from honda and it does not even show one...

It should on the rear side of the block - you're looking for something that resembles a drain plug - NOT the huge hex-cap bolt


Since you mentioned it, and since I mistakenly removed and installed it about 100,000 miles ago without incident, what is that big hex-plug?

 

[440Magnum]

Originally Posted By: sayjac
And the engine composition of today is not the same as decades ago.


It takes a LOT of decades back to find much difference. The metallurgy of production car engines hasn't changed in 40-45 years. 40 years ago there were iron-block engines with a great deal of aluminum (water pump housings, timing cases, intake manifolds, and in some cases heads). Today there are iron-block engines with lots of aluminum (Ford Modular, Chrysler Hemis, etc.). 40 years ago there were all-aluminum engines with iron liners (both wet and dry). Today we still have those. 50 years ago, aluminum was far more rare, but "conventional green" coolant was used up until 15 years ago, so what went on 50 years ago is a bit irrelevant.

One significant difference that came about in the last 20 years was the disappearance of copper alloys and solder in cooling systems- no more brass radiators and heater cores. But thermostats and temperature sensor bodies are still brass, so any coolant still has to protect brass.

 

[440Magnum]

Originally Posted By: mechanicx


I think the flow is the same direction- in through the lower hose and out through the upper-only the thermostat is placed in the lower hose inlet. The hot water should still exit the upper hose. GM did the same thing on several of its 4-cylinders.

Seems like with this set up draining the radiator wouldn't get asmuch out of the block as the design with the thermostat in the top hose.



That is an "inlet side thermostat" system, and is almost universal on Chrysler v6 engines in recent years, among others. I believe there have been some true "reverse" flow systems out there too- the idea being to avoid over-cooling the lower cylinder walls when maintaining the heads at the set operating temp. But those are far less common since you can do the same thing with inlet-side thermostats and a lot of bypass volume.