Overheating - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

gwong · 12-09-2001, 01:00 AM

Can't seem to figure out why my engine is overheating all of a sudden.  I'm ruling out a bad head gasket because the motor oil is okay, and no smoke from my exhaust.  Compression seems fine.  I replaced my stock radiator with a new 2 row, changed thermostats twice, flushed the system, and I'm still overheating under hard boost.  

S13Grl · 12-10-2001, 08:11 AM

How much boost are you running at the time your engine overheats? How good is your intercooler?

*ca18guy* · 12-10-2001, 08:24 AM

more important question would be, what type of engine do you have. Were not mind reader's <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

S13Grl · 12-10-2001, 08:38 AM

He's got an SR20DET

12-10-2001, 08:46 AM

muahaha ..... ####...... *dreams* maybe u have some problem in the delivery of the cooling stuff ........ yah <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>

240sxracer · 12-10-2001, 10:08 AM

check your hoses  mine was overheating because my lower radiator hose was colapsing also check for air in your cooling system our you might have too much antifreeze also did you replace your plugs before it started overheating  the wrong gap or plug can cause overheating

gwong · 12-10-2001, 11:16 PM

Sorry, but I have a turbocharged, rebuilt KA24DE.  Only running average 10 psi boost.

gwong · 12-10-2001, 11:22 PM

I'm afraid I might have done something internal, like cracked a head or something.  So far I've pretty much eliminated every other possibility I can think of.  I've tried eliminating and blurping all the air out the system as possible, but it seems like everytime I run hard, the hoses swell up real hard, like more air has entered the system.  I hear there's something called a Block Check??  that I can use to test for exhaust gases in the coolant.  That may help give me a better clue.

*ca18guy* · 12-11-2001, 02:46 PM

Sound's like it might be internal, since you replaced everything in the coolant system. Have you replaced the water pump? Sure you checked all the hose's. Has me scratching my head, post back if you find the answer.

gwong · 12-11-2001, 04:33 PM

No I didn't replace the water pump.  Should I because I think it's working okay.  In the meantime, I'll just keep tinkering around until I hit the problem.

Arcane · 12-11-2001, 08:23 PM

it probably is the water pump...because i just got my car back from a shop because my car was overheating also...my water pump was leaking and i spent like 70 + labor to get it fixed...

alchemist · 12-11-2001, 08:54 PM

ouch 70 and labor.....that pump is only like 30 remanufactured at napaonline

Arcane · 12-11-2001, 09:10 PM

i don't buy remanufactured parts...the shop won't warranty the part...

12-09-2001, 01:00 AM	#1
gwong Leaky Injector Join Date: Dec 2001 Location: st. louis Posts: 70 Trader Rating: (1) Feedback Score: 1 reviews	Can't seem to figure out why my engine is overheating all of a sudden.  I'm ruling out a bad head gasket because the motor oil is okay, and no smoke from my exhaust.  Compression seems fine.  I replaced my stock radiator with a new 2 row, changed thermostats twice, flushed the system, and I'm still overheating under hard boost.

12-10-2001, 08:11 AM	#2
S13Grl Married to the Mob Join Date: Dec 2000 Age: 44 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	How much boost are you running at the time your engine overheats? How good is your intercooler?

12-10-2001, 08:24 AM	#3
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 42 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	more important question would be, what type of engine do you have. Were not mind reader's <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

12-10-2001, 08:38 AM	#4
S13Grl Married to the Mob Join Date: Dec 2000 Age: 44 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	He's got an SR20DET

12-10-2001, 08:46 AM	#5
Guest Posts: n/a	muahaha ..... ####...... dreams maybe u have some problem in the delivery of the cooling stuff ........ yah <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>

12-10-2001, 10:08 AM	#6
240sxracer Zilvia Member Join Date: Oct 2001 Posts: 197 Trader Rating: (0) Feedback Score: 0 reviews	check your hoses  mine was overheating because my lower radiator hose was colapsing also check for air in your cooling system our you might have too much antifreeze also did you replace your plugs before it started overheating  the wrong gap or plug can cause overheating

12-10-2001, 11:16 PM	#7
gwong Leaky Injector Join Date: Dec 2001 Location: st. louis Posts: 70 Trader Rating: (1) Feedback Score: 1 reviews	Sorry, but I have a turbocharged, rebuilt KA24DE.  Only running average 10 psi boost.

12-10-2001, 11:22 PM	#8
gwong Leaky Injector Join Date: Dec 2001 Location: st. louis Posts: 70 Trader Rating: (1) Feedback Score: 1 reviews	I'm afraid I might have done something internal, like cracked a head or something.  So far I've pretty much eliminated every other possibility I can think of.  I've tried eliminating and blurping all the air out the system as possible, but it seems like everytime I run hard, the hoses swell up real hard, like more air has entered the system.  I hear there's something called a Block Check??  that I can use to test for exhaust gases in the coolant.  That may help give me a better clue.

12-11-2001, 02:46 PM	#9
ca18guy Premium Member Join Date: Jul 2001 Location: Clearwater FL Age: 42 Posts: 3,226 Trader Rating: (0) Rides Gallery: ca18guy Feedback Score: 0 reviews	Sound's like it might be internal, since you replaced everything in the coolant system. Have you replaced the water pump? Sure you checked all the hose's. Has me scratching my head, post back if you find the answer.

12-11-2001, 04:33 PM	#10
gwong Leaky Injector Join Date: Dec 2001 Location: st. louis Posts: 70 Trader Rating: (1) Feedback Score: 1 reviews	No I didn't replace the water pump.  Should I because I think it's working okay.  In the meantime, I'll just keep tinkering around until I hit the problem.

12-11-2001, 08:23 PM	#11
Arcane Zilvia Junkie Join Date: Nov 2001 Posts: 597 Trader Rating: (0) Feedback Score: 0 reviews	it probably is the water pump...because i just got my car back from a shop because my car was overheating also...my water pump was leaking and i spent like 70 + labor to get it fixed...

12-11-2001, 08:54 PM	#12
alchemist Zilvia Member Join Date: Oct 2001 Posts: 192 Trader Rating: (0) Feedback Score: 0 reviews	ouch 70 and labor.....that pump is only like 30 remanufactured at napaonline

12-11-2001, 09:10 PM	#13
Arcane Zilvia Junkie Join Date: Nov 2001 Posts: 597 Trader Rating: (0) Feedback Score: 0 reviews	i don't buy remanufactured parts...the shop won't warranty the part...