Okay guys i just did a swap in my car and my car for some myterious reason is overheatings.

Motor has no thermostat.

Brand new radiator and fan which stays on at all times when im driving

NO water in the oil at all and car does not smoke at all

Coolant level is perfect and reservoir also the system stays full at all times does not leak.

And its still overheats with no leaks anywhere.

I was thinking it might be my water pump but there is no leaks or weird noise

I really hope its not my headgasket because car runs perfect and no water in the oil or smoke PLEASE HELP !!!

 

uuuhhhh you should try putting a t-stat in that thing before you overheat it....??

 

uuuuuhhhh a motor won't over heat without a t-stat. it just wont warm up as fast, and might have better coolant flow.

OP, make sure you have properly bled the coolant, you might have some air bubbles. I'm assuming this is a honda, so put the front end on jack stands, unscrew the coolant bleed nipple (usually on the t-stat housing) and run the car until no more bubbles come out. Once there is a steady stream of coolant, tighten the bleed valve back up, and make sure your radiator is topped off.

 

Sounds like a water pump problem, assuming you have done the above^^^. 94

 

water pump is working 100% already checked that, system has no leaks, and does not everheat when car is dead stop, only when driving it. already bleeded the system like 5 times and nothing, anyone has any other advice?

 

Is your gauge working right?

 

Check rad fan direction, make sure rad fan is running in the correct direction.

How did you check W/P operation?

How about the rad cap, is there coolant flow into the overflow reservoir when engine overheats.

What size rad?

What is MM&Y of car and model of engine swap? 94

 

right.... no t-stat = no overheating and better coolant flow. obviously you have no idea how a engine cooling system works.

If you remove the thermostat it will not be able to regulate the temp in your car at all. Either it will never warms up and gets to be thermally efficient (and wears out the internals faster) or it will run really hot and could cause engine damage(blown head gaskets or warped heads).

Also coolant has a higher boiling point when under pressure. With the t-stat out it will be harder to reach cooling system pressure as its all down to the pump rpm.

Hey its your engine. Do whatever you want. Just don't make these uneducated claims and false hopes for the op.

 

You got the first part right, but theres no way not having a t-stat will make your car overheat. You just said something dumb and now your trying to cover your ***.Op, is your coolant fresh and a 50/50 mix? Also, make sure the valve to your heater core works.

 

Ditto the above^^^ I have yet to see a car come into the shop with overheating issues due to no thermostat or one that is stuck open, there are a number of reasons an engine overheats, no thermostat is not one of them.

The #1 reason engines overheat is due to poor coolant flow, stuck, [closed] thermostat, worn out water pump or some other restriction, [like clogged rad].

The #2 reason an engine overheats is due to poor air flow through the rad.

An engine that overheats when idling but not when moving is almost always due to a rad fan problem.

An engine that overheat when moving but not when idling is almost always due to a rad fan running backwards, although poor coolant flow is a close 2nd., [an engine that is under load will produse more heat]. 94

 

before you call someone "dumb" go back out to your garage and see if you can correctly fix you pos ef/h22 car. I dont see how you can fix somebody elses car over the internet when you cant fix your own.

with out some flow control coolant can pass through the radiator without slowing enough to cool, returning to the engine hotter with each circuit of the liquid.

yeah while they swapped the engine they swapped the radiator fan around. something that cannot be physically done with a honda radiator and fan. also 50/50 water/coolant solution will not make one bit of difference as to an overheat situation. op do not listen to these peeps.

The thermostats job is to keep liquid in the radiator long enough to cool it. The manufactures have set a certin temp that the engine can run at before it needs to be cooled. If the operating temp of the engine is below the thermostate temp level (say 180 degrees), there is no reason to try to cool the engine down lower than that temp.

When the thermostat is close the coolant in the radiator will continue to cool. Even if the outside temp is 100 degrees it will still be cooler than what your engine temp is. When the temp outside is in the higher levels it will take more time for the coolant to cool while in the radiator. By removing your thermostat, you create a situation where the coolant never sits in the radiator long enough to reduce the temprature of the coolant. Essentially the coolant is constantly circulating and never cools down. You will most likely see a rise in the operating temp.

you other guys; try googling if removing a t-stat is a good idea. let me know what ya find. I've been working on cars(and trucks) way too long to put up with the geniuses on honda-tech. I've been master cert from Honda/Acura school and a Master ASE, if you even know what that is try googling that too. good luck.

 

Ok, I cave on the thermostat deal. You were right, looks like i am the one who said something dumb. I did some more research, and you should too. Google search coolant mixture, the third link down, as well as a few others, relate to overheating due to too much antifreeze in the mixture. Also the fan is a valid question, most swapped cars I see run some sort of after market fan for better clearance. Also my car runs at the perfect operating temperature, so you can retract your comment, since it has nothing to do with this topic. Maybe you should just tell me whats wrong with it instead of being negative. Op, any luck yet?

 

I know it was not me that called you dumb, but it's beginning to show.

I never said they "swapped the radiator fan around" I asked the OP to make sure it was not running backwards, it is a DC motor, getting it to run "backwards" is as easy as wiring the power and ground backwards, I have seen it more then once, my shop... http://airwolfeautoair.com/

Also, "50/50 water/coolant solution will not make one bit of difference as to an overheat situation" as mentioned your also wrong about that.

No one here has said that removing a thermostat was a good idea, I agree it is not, it is there for a reason, but I have been working on cars for 40+ years, [long before you were your daddy's wet dream] and have never run into one that was overheating because the thermostat was missing or stuck open although I do agree that on newer high revving engines a "secondary" function of the thermostat is to "slow" down the movement of coolant through the rad to increase cooling but it is the least likely of the OPs problem I would not mention it until I was sure all other possibilities, [more common overheating causes] had been checked.

So before you tell an OP not to listen "these peeps", [check my post count, I resent being called a peep probably more then you do having someone say you said something dumb] get your facts straight. 94