d16 overheating.... i searched
 

ok so here is the deal... brand new headgasket back in may.... .020 over vitara/eagle build... pretty much the car will run great for 30 minutes or so, but after that the idle raises up to about 2k and the temp gauge slowly starts to creep up to about 3/4ths the way up a eg temp gauge. ive bled the coolant system a couple times and it is in no way pushing coolant. the car is not even in boost and is over heating. there is no white smoke what so ever coming out of my exhaust. the throttle body seems to stick at this 2k rpm spot once it starts heating up, the pedal can be pushed back in order to drop the idle back down, but once the gas pedal is pushed again it will fall back into this 2k rpm spot. it is very consistent with this.... as soon as the idle acts up.. .the car starts to overheat. im thinking i might need a coolant flush but i really have no idea. the car previously before i built it, which it was turbo on the stock engine, never overheated... and if it did it was a direct result of pushing coolant. the heat is really weird as well. sometimes the heat will be unbareably hot... where at other times it is not as intense and almost cool, this is what leads me to think that i need to flush my system out. im running an aftermarket mishimoto rad. with a slim line fan from b18bturbo i believe from honda tech.... any body else have similar problems like this with a d16 turbo? another thought i had was running a block off plate on the side where the condensor was previously...

thanks again and let me know what you guys think... i really did search so please dont give me ---- about that

Re: d16 overheating.... i searched
 

Which d16? If its an a6 and you used a composite headgasket you fucked up. If not then you need to put a theromstat in first. If the car sat for any length of time, you probably have a stuck tstat, and its a real good idea to put a new rad cap on if you havent already.

Re: d16 overheating.... i searched
 

if your heat goes away it means your losing water
probably from te hg
and you are probably losing water at the temp sensor and making it think its cold and raising you idle

this is all speculation but one thing is for sure, you are losing water somewhere

Re: d16 overheating.... i searched
 

sorry this is on a z6.... temp sender is almost new... thermostat is new... well like less than 5k on it... but the car did sit for a 3-4 month period... ran... then sat for another 6 months or so... also the rad cap is has pretty much less than 5k on it as well... i guess if i got one of those i would probably need to get it right from mishimoto...

Re: d16 overheating.... i searched
 

if temp gauge was losing water near it... would it not see it as hotter... raising the idle would not make any sense in that situation as temps would be way hotter than a "cold start"

Re: d16 overheating.... i searched
 

dont ask a question and not listen. it is a stat from sitting u can get a bad one new. so try the cheap shitfirst

Re: d16 overheating.... i searched
 

Re: d16 overheating.... i searched
 

i understand this... but i believe the thermostat is working properly... both hoses leading to the radiator get quite hot so i know it is opening and closing as the one is cool after i first start it, while the other is hot... so im pretty sure that is in check.

Re: d16 overheating.... i searched
 

omfg its a honda not a gm
ittl take you 2 seconds to change ur tstat that cost 7 bucks
its not like you have to completly remove your intake to get to the tstat

change it and see what happends and even if u change it and it doesnt fix it who gives a ----

Re: d16 overheating.... i searched
 

could also be a broken water pump...

Re: d16 overheating.... i searched
 

water pump has less than 2k on it.. i hope it would not be broken

Re: d16 overheating.... i searched
 

i mean i dont think this has anything to do with it but could it be tune related?

i am running the map that was on this engine before... only thing different with the setup is the vitara pistons and eagle rods...
im using the same head that i had on the car before...

Re: d16 overheating.... i searched
 

Well your car has a lower compression ratio now. It's stupid to think that the same map will run your new engine the same way.

Re: d16 overheating.... i searched
 

its pig rich... why would that would make it run hotter.... its completely fine until after like 30-40 minutes then the idle jumps up and the overheating begins

if it was in the tune.. i would think it would begin overheating right away

Re: d16 overheating.... i searched
 

since you still havent seemed to figure it out yet, im pretty sure you had the same problem i had. try flushing the ---- outta your heater core. you know how much ---- gets stuck in that bitch when the car sits for a long period of time? i had the same problems your facing and i replaced every ------- hose on my cooling system as every single guage and sensor, even the water pump,t-stat, and rad i changed. still the problem occured. then i had the bright idea to unhook my heater core and just loop around it not even using it, problem solved. eventually though i replaced it and had no issues since. now take it this happened to me in the middle of winter, so if i were you id take care of this now. start with what i said and loop around the heater core. and check the ------- hoses for cracks. the slightest crack that lets in any amount of air will cause the system to go el' fucko' on you. give it a try and report back reggin.

Re: d16 overheating.... i searched
 

I should have made myself more clear. When honda tstats stick they generally stick OPEN or partially. Hince why you are getting 2 warm hoses, and still overheating. Also, how old is your water pump?

Re: d16 overheating.... i searched
 

tstat bitch.

Re: d16 overheating.... i searched
 

t-stat x3 it is cheap and easy if it is not the problem atleast you can feel good knowing it wont be a problem for a while atleas

Re: d16 overheating.... i searched
 

Pull out the thermostat. Put it back together and make sure the rad isn't plugged...

You can always build a new motor if you would like!!

Re: d16 overheating.... i searched
 

sorry for the no reply... just got back from the beach... probably going to flush the heater core and do a t-stat.... radiator shouldnt need flushed... maybe 8k on that.... thanks for all the responses.... i just want/need to get this ---- figured out before i put my holset on it and get it tuned.

Re: d16 overheating.... i searched
 

pretty sure it is something with the heater core... whether it is clogged or letting air in somewhere... if i keep the temp on the climate control all the way in the blue.... it never overheats.. only if i slide it over.... flush it or just use the core from my 97 civic parts car?

Re: d16 overheating.... i searched
 

If the ------- heater core makes the difference then you have other issues. If its not leaking, then its not letting air in. Its under pressure, path of least resistance and all. If you have coolant in your floorboard then replace the bitch. Having a clogged heater core is not going to make your motor overheat unless its already having problems displacing the thermal mass.

I still think you need a tstat. Check for leaks of the heater core, if you find none then thats not your problem. Not saying the core isnt clogged, just saying if its not leaking it cant cause your car to overheat.

Re: d16 overheating.... i searched
 

you could also jump the thermoswitch wires to make the fan come on when ignition is on. this is only a band-aid though, still need to check tstat

Re: d16 overheating.... i searched
 

as you can see this was the problem with his... so im not making ---- up...

Re: d16 overheating.... i searched
 

Are you running ARP head studs or factory bolts? My friend had a same problem due to his stock head bolts gettin stretched. It also might be the headgasket as stated before.