Need your help, overheating and many other problems - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Keg · 09-28-2018, 02:34 PM

So about 2 months ago i rebuilt the head (ka24de w/ 233k), during this period i replaced a ton of parts and it ran amazing for about a month and after that it started to develop problems such as over heating.

All of the parts i replaced:
headgasket
valve stem seals
pretty much every gasket i had to remove
relapped all of the valves
new mishimoto radiator
new thermostat
new water pump
had to bypass the heater core as it was clogged and i have no use for it anyways

The problems:
white or blue smoke (really hard to tell) during high rpms, 5k+
overheating at idle and driving but not all the time, only way i can cool it down is hold the rpms pretty high for a little
rough idle
loosing oil but my valve cover is leaking so i am not sure if i am burning oil as well. I would fix it but one of the valve cover bolts closest to the firewall broke off inside (Car came with it broken) and i cant drill it out unless i pull the head again.
The car does run a little rich because i adjusted the dissy to run a little advanced (in hopes of a couple of hps)

What have i done?:
i have bleed the coolant a million times!!!! its usually fine for a little and then starts overheating.
I have looked for leaks and i dont have any, not a single one.

Someone pls help i have spent hours pulling my hair out trying to figure this out.

unicoder · 09-30-2018, 11:38 PM

If it overheats at idle, and giving it throttle will get it to cool down, you have air in the system. One of the most annoying engines to bleed i know.

feito · 09-30-2018, 11:47 PM

Quote:

Originally Posted by unicoder

If it overheats at idle, and giving it throttle will get it to cool down, you have air in the system. One of the most annoying engines to bleed i know.

Have you ever had to bleed a g35 sedan?

Anyway, OP, how's your clutch fan?

tuzzio · 10-01-2018, 08:09 AM

Invest in one of the coolant funnels. Best thing I ever did for my KA.

That aside, if you're still burning oil. Check your valve guides. Been there. Done that.

EFITTZY · 10-01-2018, 12:26 PM

Did you install all of said parts yourself? If so, are you sure you have your valve stem seals fully seated?

09-28-2018, 02:34 PM	#1
Keg Join Date: Sep 2018 Location: Texas Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	Need your help, overheating and many other problems So about 2 months ago i rebuilt the head (ka24de w/ 233k), during this period i replaced a ton of parts and it ran amazing for about a month and after that it started to develop problems such as over heating. All of the parts i replaced: headgasket valve stem seals pretty much every gasket i had to remove relapped all of the valves new mishimoto radiator new thermostat new water pump had to bypass the heater core as it was clogged and i have no use for it anyways The problems: white or blue smoke (really hard to tell) during high rpms, 5k+ overheating at idle and driving but not all the time, only way i can cool it down is hold the rpms pretty high for a little rough idle loosing oil but my valve cover is leaking so i am not sure if i am burning oil as well. I would fix it but one of the valve cover bolts closest to the firewall broke off inside (Car came with it broken) and i cant drill it out unless i pull the head again. The car does run a little rich because i adjusted the dissy to run a little advanced (in hopes of a couple of hps) What have i done?: i have bleed the coolant a million times!!!! its usually fine for a little and then starts overheating. I have looked for leaks and i dont have any, not a single one. Someone pls help i have spent hours pulling my hair out trying to figure this out.

09-30-2018, 11:38 PM	#2
unicoder Zilvia Member Join Date: Apr 2017 Location: Alabama Posts: 160 Trader Rating: (2) Feedback Score: 2 reviews	If it overheats at idle, and giving it throttle will get it to cool down, you have air in the system. One of the most annoying engines to bleed i know. __________________ 5.3 V8 Swap w/ Nitrous

10-01-2018, 12:26 PM	#5
EFITTZY Zilvia Junkie Join Date: Mar 2016 Location: I n d i a n a Age: 25 Posts: 323 Trader Rating: (0) Feedback Score: 0 reviews	Did you install all of said parts yourself? If so, are you sure you have your valve stem seals fully seated? __________________ (づ｡◕‿‿◕｡)づ T E A M B L O O M

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10-01-2018, 08:09 AM	#4
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	Invest in one of the coolant funnels. Best thing I ever did for my KA. That aside, if you're still burning oil. Check your valve guides. Been there. Done that.