help somebody, anybody!!

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

I had just gotten out of work and was bored so I decided to go to some deserted roads and just run up and down. My car suddenly started overheating and I went home.

I opened my hood and noticed the piece between my exhaust manifold which the wastegate is connectecd to was glowing a bright read-orange like when you heat metal for a long time.

what does that mean I doubt this is normal or good.

Please if you have any ideas help!!!!!

thanks:( :help :confused:


Cyberkreig
Posts: 3048
Joined: Sun Sep 01, 2002 4:40 pm
Car: 1993 Nissan 240SX SR
Contact:

Post

between the exhaust manifold? Not sure i am crystal on your defintion.. Not the turbo itself?

i *THINK* our turbos have oil& water lines. so if a water pump failed/ you had some kind of blockage in the water path that could overheat your motor and keep cooling water from getting to the turbo.

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

yes I am pretty sure it was the turbo.

so your saying my water pump might have gone??

Also I could hear water boiling out somewhere in the back of my engine but my engine was to hot couldn't see well enough.

my coolant reservoir's water rose as well

thanks for the reply

Cyberkreig
Posts: 3048
Joined: Sun Sep 01, 2002 4:40 pm
Car: 1993 Nissan 240SX SR
Contact:

Post

Coolant res will rise any time the water starts to boil. Noise in the "back" of the engine usualy have to do with heater core. I wish i could tell you how to check the heatercore lines but i dont really know.

all you have to do to check the waterpump is take teh cap off the radiator when the car is COLD. Starter-up.. within a few moments the thermo will open up and you should be able to see water flowing inside the radiator.

Hopefully the more knowledgeable people can give you better answers in teh morning.

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

would my water pump be my only problem or would there be something else causing my turbo to overheat in that mannner??

Would those water and oil lines be fouled as well??

Last time I checked my water pump was working fine I checked as you stated like a week ago.

thanks once again for your reply hopefully I will get more in the morning

the_invisible
Posts: 229
Joined: Mon Feb 24, 2003 7:51 am
Contact:

Post

There could be a blockage or air bubble in your cooling system. But I am sure you assumed this already.

If your water pump is still operating, if you tested it correctly last week, the problem is probably air or bubble. I heard someone here said that something could build up in the system and cause a blockage, but that usually won't happen if you flush your cooling system every two year. Another possibility is the thermostat. Thermostat can get sticky over time and block the flow of coolant.

But I am sure you know all these already, so let's hope someone who is more knowledgable answer your questions.

S13240
Posts: 1908
Joined: Fri Jul 26, 2002 8:06 am

Post

Sounds like a coolant problem alrite. If you hear like water was boiling behind the engine then it could be that you have a leak there somewhere and your car is overheating. That happened on my car once, I had just swapped in my second motorset into my car and I forgot to tighten the clamp on the heater hoses in the back of the engine and while I was driving it down the street my car started getting hot. I stopped immediately and let my car cool down for about a good 10 minutes. I quickly got back into my car of course with the hood closed and drove back home. Parked the car and looked around...I noticed that my heater hoses had a leak because it was bubbling out of the hose itself. So I tightened the clamp and went for another drive and "voila"! I didn't overheat anymore.

pampadori
Posts: 431
Joined: Sun Aug 18, 2002 3:52 pm
Car: 91 Nissan 240SX coupe

Post

the turbo will glow red if you are hard on it for a while. but also, exhaust backpressure will make things heat up fast. do you have a cat hooked up? is it clogged? check for coolant leaks with a pressure tool. is it overheating now that you aren't driving it hard?shaun

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

no when I drive it hard it does not overheat.

but if I am street driving everytime I stop it will begin to overheat and then when I start and maintain a crusine speed the temperature will go down.

I appreciate all the help I will do all that was recommended and get back to you guys.

thanks

pampadori
Posts: 431
Joined: Sun Aug 18, 2002 3:52 pm
Car: 91 Nissan 240SX coupe

Post

SrS13 wrote:no when I drive it hard it does not overheat.

but if I am street driving everytime I stop it will begin to overheat and then when I start and maintain a crusine speed the temperature will go down.

I appreciate all the help I will do all that was recommended and get back to you guys.

thanks


how do you know it overheats? does the stock temp gauge peg itself to the h? is your car a s14 with s13 motor? or do you have a aftermarket temp gauge and the reading goes above 210 degrees?shaun

Phax
Posts: 1624
Joined: Tue Nov 12, 2002 6:24 pm
Car: Control dynamics

Post

SrS13 wrote:no when I drive it hard it does not overheat.

but if I am street driving everytime I stop it will begin to overheat and then when I start and maintain a crusine speed the temperature will go down.

I appreciate all the help I will do all that was recommended and get back to you guys.

thanks


What you've described seem like typical symptoms of a bad waterpump. When you're sitting still, the temp goes up because the coolant is not being pulled through the system properly. But once you get going, the car cools down because it is being cooled by the air going through the radiator.

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

i just realized I posted saying that when I drive it hard it does not overheat.

It does overheat when I drive it hard as well as when I am street driving it normal. I will change the water pump as soon as possible.

is the water pump what caused the turbo to glow red as well????

User avatar
Nils
Posts: 456
Joined: Wed Aug 28, 2002 1:03 pm
Car: road racing
Contact:

Post

You are not sure where/what the turbo is?this will be pretty hard to diagnose if you dont even have basic engine/turbo knowledge.

What kind of fan(s) are you running? do you have a fan shroud?s13 sr in a s14 chassis? How long have you had this sr20det? etc.....

Exactly how hard did you drive your car that day, how hot was it outside? How long?

It is not uncommon for the exhaust housing to glow red after driving a turbo car hard for an extended amount of time.... I really hope you didnt just shut off the car after driving it hard. Turbo needs some 'cool off' driving to prevent from warping and cracking.

let us know...

n

User avatar
RobDET
Posts: 1553
Joined: Wed May 07, 2003 5:51 pm
Car: Cars

Post

The Turbo on my DSM used to glow red under very light load. One night i just drove home from work on the highway... about 55 mph. It was red when i got home... It never did run hot tho

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

Nils wrote:You are not sure where/what the turbo is?this will be pretty hard to diagnose if you dont even have basic engine/turbo knowledge.

What kind of fan(s) are you running? do you have a fan shroud?s13 sr in a s14 chassis? How long have you had this sr20det? etc.....n


I am learning as I go along I just took over my brothers 240 cuz he went off to collage. The sr is an S13 in a S13 chassis I have an electric fan (not aftermarket) and the stock shroud
Nils wrote:Exactly how hard did you drive your car that day, how hot was it outside? How long?n
I drove it up a street reving to 6000 through each gear once and my car began to overheat so I went home it was pretty warm out dont know the exact temperature.
Nils wrote:It is not uncommon for the exhaust housing to glow red after driving a turbo car hard for an extended amount of time.... I really hope you didnt just shut off the car after driving it hard. Turbo needs some 'cool off' driving to prevent from warping and cracking.

let us know...

n
No I did not shut it off the car was maintained on by the Turbo Timer for at least 3 min.

I am aware of turbo maintenance.

thanks for the reply hope the info helps, help me

User avatar
Nils
Posts: 456
Joined: Wed Aug 28, 2002 1:03 pm
Car: road racing
Contact:

Post

start your car up and let it idle for a while.... as it is idling put your hand on the top coolant hose, the one that feeds the radiator with water. Does it get hot?

Let us know if that hose ever gets hot. If it never gets hot, that means the pump could be out, the thermostat is frozen or your heater hoses in the back of the engine are reversed.. or even other possible things

but, that is a good start for us to know to help you diagnose this.

n

User avatar
Nils
Posts: 456
Joined: Wed Aug 28, 2002 1:03 pm
Car: road racing
Contact:

Post

oh.. but wait.. you already said that you got radiator fluid over flow.. so you are getting flow through your radiator....

hmmmm

nevermind my previous email

n

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

thanks anyways any other ideas???

At least now I know that the turbo heating up like the way it did is normal

the_invisible
Posts: 229
Joined: Mon Feb 24, 2003 7:51 am
Contact:

Post

instead of diagnosing everything, check for the hoses' pattern, replace the waterpump and thermostat and flush the entire system and make sure that the system is flowing properly. This way, you are redoing everything again, besides, its just better insurance.

User avatar
SrS13
Posts: 249
Joined: Sun May 04, 2003 6:28 pm
Car: 1990 Fastback, 1993 Convertible Coupe

Post

thats a good idea aswell


Return to “SR20DET Forum (rear-drive)”