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Ok I just finished turboing the BP engine That I put into my car. When I put the BP in not even 1500miles ago it has a new thermostat and whatever. So now everytime I idle for more than 30 secs after driving around the car doesn't show its Overheating but the water is boiling over into the Resevoir, Now question is:

Is it because possible my Radiator cap is bad and it opens too early to let the Coolant into the res.

Or

Since my Car is a 92 SOHC is has a fan on only one side, the side without the raditor cap. Should I buy another fan?


So far I am gonna set out tomorrow to go to Napa and get a radiator cap and see how that goes. If it doesn't, my friends dad said to take out the thermo stat and it will run cooler, so would that help? Right now I am trying to get my car to run cooler. Burnt my arm yesterday after the res pressure spout was blocked and the res cap was halfway off so I put the Res cap back on all the way and the thing exploded. (DUMB THING!!! Never touch any part of the cooling when the car is hot. Lesson learned by me).

Thanks

Taking out the thermostat wont solve a over heating problem.. it will take the engine longer to overheat.. but it will still eventually over heat. Could be the radiator cap as you mentioned and a second cooling fan would definately increase the efficiency of your radiator (and is a dang good idea to do considering the extra heat you are now generating).. another thing you can check as well.. make sure the fins of your radiator arent plugged up with crap.. bugs.. pine needles.. etc.. Also check your timing.. Retarded timing will result in a hotter running engine (overly advanced timing will as well but to a lesser degree) Hope this helps.

Tunes67

you've had the engine in for 1500 miles and the problem just started now? that's kinda weird. you should probably check your sending unit / temperature guage to make sure they are working correctly.

you should try flushing out your cooling system...my BPT had a bunch of nasty corrosion in it (still does have quite a bit). i flushed mine by emptying all the coolant, filling it up with water (you don't need to add antifreeze). run the engine for awhile to let the water circulate, then drain the water...keep doing this until that water that comes out is clean. apparently there is some kind of cleaning solution you can put through the system to help get it clean too but i just used water. anyways this helped my BPT run a little cooler.

oops just noticed the part where you said you just got done turboing the car. did you drain the coolant when you were putting the turbo stuff on? if you did your engine could have an air lock (air bubble) in it. my dad has taken the thermostat completely out of one of his cars in order to get an air lock out it may take awhile but it should come out. when it does just put the thermostat back in and it should be good to go.

Ya I think one of my hoses are leaking so That might have something to do with it. It was weird cause it just started doing it after I turbo'd. I didn't drain the coolant system so I don't know whats up. Also the temp sender is fine. It tell me when it is hot. I ran the BP hot one time while idling at my house for 15 mins when I didn't have the fan hooked up (The relay kept blowing so I have it on a switch) and after I took off the temp sensor shot up but through this whole thing the temp sensor has never gone past normal leading me to think it is the Cap. I am gonna try to have my dad get me one today. Hopefully I can convince him to .

i think its probably your cap. i forgot you put your fan to a switch. you need to get a new relay. i have an extra fan sitting around, if you want it. i dont need it. when i turboed mine i went with a 180 deg thermostat, I never get hot and the fan almost never comes on. it only comes on when i'm in rush hour traffic and its like 80 deg out.

That Would be cool. But ya it was the cap I think. And if not I fixed whatever it was for awhile. My Dad went and got me a RX7 radiator cap that won't blow over until like 16lbs until the original one that goes at 13.2lbs. So it should work I guess.

On a side note, Has anyone had any trouble with running rich on Cyl 1 and kinda Lean towards cyl 4. Cyl 4 and 3 spark plugs where perfect while cyl 2 was a little rich and 1 was really rich. Any ideas?

Possibly partialy clogged injectors?

Seeing that they have 3000 miles on em (at the most) from RC I would guess not. It progressivly goes from rich to lean from 1 to 4.

yea that didnt make much sense since the #1 cylinder gets the fuel first, my best guess would be to still have them flow checked, make sure that they havent burnt out, even though something has a warranty it dosent mean that its going to last awhile (Ie Autozone and I and my 3rd altenator)