new thermo, radiator, fan switch, still pushing coolant to overflow, also noticed eratic idle .?

 

possibly blow head gasket.
did u bleed the coolant?

 

thermostat is oem ,doesnt have classic head gasket symtoms

 

think all air out of coolant , what is proper method to bleed

 

1. check the fan to make sure the fan isnt blowing the wrong way.

2. cracked cylinder head

3. warped cylinder head

everything else, just throw a new motor in it. if that fails, then dont drive a honda anymore

 

any signs to look for if head gasket. need help at wits end.

 

A popped head gasket on its own will NOT make the engine overheat. The head gasket allows coolant to make its way into the cylinder when its burned off during normal combustion...when you're low on coolant the car, in turn, overheats.

That being said...there's no reason why the 8v 1.5 should overheat...those radiators are good enough to cool boosted gsr's w/ out an issue. Try letting the car idle with the rad cap off, there's probably an air pocket in the coolant system.

 

pulled plugs this morn #2 had some coolant oil mix on top of plug , firing side looked good.any ideas

 

pop the cap off of your coolant overflow...if it's milky then you have a popped headgasket.

but again, even if the headgasket is popped that doesnt make you overheat, you'd have to burn off a good amount of coolant first in order to overheat

 

at times upper radiator hose hot, lower one cool, new oem thermos ,checked old thermo in hot water worked fine

 

overflow is not milky

 

water pump??

 

how would you check water pump

 

just had head pressure checked, hopefully we can rule out popped head gasket.

 

im sorry not to flame or anything but u talk as if u know alot but yet your still saying that the headgasket "popped" FYI late model cars come with MLS "multi layer steel" gaskets.

STEEL VS ALUMINUM - steel wins. so now tell me, how does the headgasket "pop" on a honda if its steel vs its aluminum head/block..

what you are trying to say is the cylinder head is warped.. headgaskets dont blow on hondas anymore its pretty much not possible unless you try to push 50 psi on a stock motor then you MIGHT slightly damage the headgasket. if you are a mechanic and you work on all sorts of vehicles you will notice that older head gaskets and head gaskets for more of the v8 motors (older years) were actaully made of simillar stuff as our paper intake manifold gaskets.. those used to be the gaskets that "popped" soooooooo to the OP, before you go ahead and put a new gasket on it make you resurface the cylinder head other wise you will have the same problem as it goes back on. just fyi tho.

 

back to my problem, i dont think its head gasket or warped (pressure checked). every possibility im aware of has been elimated . taken to repair shop twice , couldnt find any problem. what temp should fan come on . mech says 225

 

well first sympton was eratic idle. check the iac. clean it out to make sure its not clogged. there is one other spot you can check and thats the fitv it sits under the throttle body. take it off and clean it too

 

popped hg huh? round these parts we say blown hg.. sorry, it was just botherin me lol.

anywho, to me it does sound like a blown hg. exhaust gases leaking into the coolant jacket will over-pressurize the lines and cause the coolant to 1. stop circulating properly which leads to overheating, and 2. cause the coolant to be pushed into the overflow. i had a mustang and the hg blew the same way. overheated, excess coolant in overflow, and no white smoke out the *** end. now maybe it's not the hg, but i would be suprised after everything i've read thus far.

you might also try a cylinder leakdown test in all 4 cylinders. most likely you will find one or 2 adjoining cylinders allowing air to leak into the coolant jacket and you will see air bubbles come out of your radiator while performing the test.

 

id say its not the water pump youd see coolant under the car after leaving it idle its probly hg does your temp go above half but not all the way up

 

i had the exact same issue on my 1994 CX (d15b8) and it was the head gasket causing the overheating... needless to say i had the symptoms of a blown head gasket (milky oil, overheating, and burning of coolant). i used an OE replacment gasket and replaced it for the blown one which took all of 3 hours including cleaning everything. i noticed before i replaced the head gasket that i had an extremely low idle. and after i replaced it on its first start i had an erratic idle (800- 1500 RPM). i checked my timing which was dead on and then removed to the IACV which was casuing the problem.

i would try to replace the gasket. its not hard if you have worked on Honda vehicles before and it will cost you only $40 for the HG ,EX. mani gasket and valve cover gaskets

 

does a 95 cx have a fitv ,

 

after head pressure check ,seems to be better. still loses some coolant?