Coolant Crisis

The Nissan 300ZX (Z32) general community discussion forum
User avatar
Fox213506
Posts: 198
Joined: Fri Nov 03, 2006 11:23 am
Car: 1990 Nissan 300zx N/A 1995 Motor Swap

Post

OK i was trying to fix my Oil pressure sender and notice tons of anti-Freezer leaking back there. The leak is coming from the rear of the motor but cant seem to find where the leak is from. I fear that it is something majo because of its location. Does anyone know whats back there to be causeing a leak? To give you an idea of how much it leaks, i have to top it off every morning and can take between 10 fluid oZ to 1/4 bottle of fluid. This happens almost everyday and varies depending on how long i drive it for.


User avatar
izmyttz
Posts: 594
Joined: Wed May 02, 2007 8:33 am
Car: 1990 300zx TT-White,

Post

Could be one of the heater hoses that connects behind the engine..mine burst and i had to replace it...i went a head and replaced all 3 of them i believe they were 5/8" hose.

nghtrain88
Posts: 1533
Joined: Fri May 18, 2007 7:40 am
Car: 1991 Nissan 300ZXTT

Post

there are also a few coolant hoses by the pcv hose on the driver side towards the back of the engine that are 5/16" if i remember correctly

User avatar
izmyttz
Posts: 594
Joined: Wed May 02, 2007 8:33 am
Car: 1990 300zx TT-White,

Post

yeah that's right....they may have been 5/16's
nghtrain88 wrote:there are also a few coolant hoses by the pcv hose on the driver side towards the back of the engine that are 5/16" if i remember correctly

SilverTwin
Posts: 137
Joined: Wed Sep 20, 2006 4:29 pm
Car: '91 300ZX TT
Contact:

Post

nghtrain88 wrote:there are also a few coolant hoses by the pcv hose on the driver side towards the back of the engine that are 5/16" if i remember correctly
That is correct, they are actually on both sides running up to the throttle bodies.

You will likely need to pressure test the coolant system to track down which hose it is. You will want to do this soon before it totally lets loose and leaves you stranded.

The passenger side hoses are a little easier to replace than the drivers side. You can remove the battery on the passenger side for more access.

Tim

User avatar
Fox213506
Posts: 198
Joined: Fri Nov 03, 2006 11:23 am
Car: 1990 Nissan 300zx N/A 1995 Motor Swap

Post

SilverTwin wrote:
You will want to do this soon before it totally lets loose and leaves you stranded.

Tim
Too late!, I went to my friends house and it took (pardon my language) a dump right on thier driveway . I shut it off quickly and went to take a look, the fluid all came out where i told you guys it was leaking from. I only hope the engine wasnt hurt. My Temp sensor doesent work so i had no warning. I went to open the hood and a loud wistle came from the back which is wierd because this car has never had any pressure. It might have been air inside the radiator. So how hard is this to replace? this is my DD so i need to fix ASAP. We put 50/50 in it toped it off and it ran fine on the way home( Its a 5 min drive). Hope everything turns out OK

DunnJH4
Posts: 59
Joined: Mon Feb 05, 2007 2:54 pm
Car: 1990 300ZX TT Chrome intake plenum, BOV's, exhaust, you know Just under 500HP
Contact:

Post

That's a shame Good luck getting it fixed fast. Where is Gordonsville, VA? Im gonna test my hoses back there since my engine is out anyways

User avatar
Fox213506
Posts: 198
Joined: Fri Nov 03, 2006 11:23 am
Car: 1990 Nissan 300zx N/A 1995 Motor Swap

Post

Gordonsville is 30min from charllottsville, 1 hr from short pump and about 1hr 25 min from richmond. Our town is like 1 mile wide so you prob have never heard about us. I am the only Z in town!

User avatar
Zwicked
Posts: 3133
Joined: Mon May 14, 2007 6:19 am
Car: 1990 300 ZX tt, 1990 240SX

Post

Also check the pipes. The 2 that are feed and return for the heater are at the rear of the engine. The pipes are each a 2 piece affair that bolt together with mating flanges and use sealant only seal them. It can become dry and cracked if they have never been taken apart.



Return to “300ZX (Z32) General”