Tomorrow morning I have an appointment to take the Maxima in because the radiator hose going to the thermastat collapses. (sucked in) When I remove the radiator cap you can here the pressure being released and the hose returns back to it normal round configuration.
DOES ANYONE KNOW THE CAUSE?

Last thing before I go in I have a Hyper ground kit I installed..should I disconnect all the wires prior to taking it in?

Thanks for your help!

 

1. check the overflow hose. make sure it isn't blocked.
2. could be your radiator cap.
3. thermostat is sticking.

 

btw, there's a 99% chance it's your radiator cap.
i'd spend the $8 for a new radiator cap and skip the dealer.

 

I did check the overflow hose and it works. Hmm the cap maybe the problem i dont know. I know the car stays right in the middle of the temp guage.

If I cant get a cap tonight do you think i need to remove the Hypergrounding kit before going to the dealer?

 

BTW if the overflow hose worked why wouldn't the fluid be able to be draw from the radiator threw the thermastat? I guess i am asking what does the cap have to do with the hose collapseing. I thougt the cap relieved pressure during overheat conditions!?

 

Very unusual, never heard of a hose sort of sucking in, I know it won't be the thermostat, cuz if it was stuck close, your car would overheat, if it was stuck open, then your car won't warm up quickly. That's easy to rule out, when you look at your temp gauge if it's in the middle, there's nothing wrong with your thermostat.

 

I thought the same so do you think the hose is just weak and doesn't have the strength to draw the fluid out of the radiator.

 

it's the cap. just go to the parts store and get one.

 

umm.........no.

 

Just curious, What makes you say with such guarantee that its the cap? Cus im ready to go to the store if you can explain why.

 

because when you remove the cap, it returns to normal. if you had a
bad hose, i don't think it would do that. look, if i'm wrong it cost you
about $8. if i'm right, it save you a trip to the dealer and about a jillion
dollars.

if it's not the overflow hose, or the thermostat, it's the hose or the cap. i think it's the cap.

 

okay thanks. ON my way to the store and i willupdate this to what the problem was. THANKS

 

btw...hyperground will not be a warranty problem, since it's just grounding wires. Nismo makes them, so Nissan evidently thinks they can do no harm....

 

IRISH whats up bud.. Thanks then I will leave it on.

 

I'm betting its not the cap, lets see.

 

maybe, maybe not. but it's the easiest thing to test first.

 

I see no possible way that it's the cap. The only thing that could be wrong with the cap is that it doesnt seal. When he takes the cap off, the collapsed hose returns to normal. When you take off the cap, that (obviously) breaks the seal created when the cap is in place. The fact that something happens when the cap is removed means that it makes a seal when in place, ie, the cap is fine. On the other hand, I have no clue what the problem is. Sorry to disagree with the cap idea without suggesting my own idea.

 

What is hypergrounding?? Heard of it before, but not sure what it is for.

 

it's the cap or a plugged overflow system. it has to be.

 

The rad caps have an anti-negative pressure valve that allows air in during cooldown. It doesn't seem to be working. Replace cap.

 

Well?..........

 

I stand corrected

 

not yet. we still don't know if that was the problem. besides, who
said P. Samson knows what he is talking about?

j/k P.

 

Don't forget to post pics and a write-up of your hypergrounding kit. thx

 

Ok, but if samson is right, then its not the cap. We'll see.

bladerunr, do you konw about irishj44's write up? It's pretty in depth, I used it to base my grounding kit on.

 

actually, if samson (and myself) are right, it IS the cap.

 

Dont some cars have springs or something in the hose to make sure it keeps its form under pressure?

 

If the system has positive pressure which it should have when hot, the hose/s can't collapse, they tend to bulge. Either the rad cap or on some cars the expansion tank cap have a thermal valve to allow pressure to build to keep the coolant from boiling AND a valve function to prevent negative pressure on cooldown. (usually after the engine is shutdown) This is to prevent hoses and other things (plastic) from possibly collapsing. This fellow appears to have no other problems. i.e. normal coolant temp.

 

This is exactly what is happening. When I run the car the radiator hose going to the thermastat does get hot. So we know the thermastat works. When i turn the car of after observing it for 35 minutes in -5 degree weather outside, the hose started to collapse when it got cold. So I went to the dealer and they asked me if I had a stock cap with the red/orange sticker....well I tore the sticker off and shined the cap with MAAS and shined all the A/C lines. He liked that but not the fact that the sticker was off the cap and the fact that he thought it was an aftermarket one, LOL. So we took the cap off and of course the collapsed line returned back to its normal shape. So he took it to the back and did what he needed to (i think pressurized the system and came back out and said "A cap is on order and it will take about a week to get here, come back at that time." So in the mean time I am still driving around with a line that collapses when the car cools down.

He said absolutely nothing about the Hypergrounding kit I installed. GOOD THING, I would have had to school him!

 

can't you just go to the parts store and get a cap? or does it need to be a
"special" cap? you're going to wait a week for a part that the dealer charges $14 for, when you an go to any parts store and get one for $8?

oookay.

 

Thats what I meant, you're right.

 

You bet Im going to get the cap for 10 dollars. Then I will also have me another cap from Nissan in a week after they diagnose the new cap.

 

are they covering that under warranty?

 

I don't get it.

You ask for help... the answer is suggested (at a cost of approx.$8)...you don't try the fix...you go to the dealer... and now you're going to buy two caps!

Why bother with the original question?

 

Get a Twin Turbo Z radiator cap, it has higher pressure spring in it. It keeps more pressure in the cooling system, and at the same time raises the boiling point of the coolant. If you want something BLING, then get a Nismo, Greddy, HKS, APEXI, SARD or what not radiator cap from Ebay- they are all same pressure as the 90-96 300ZX Twin Turbo radiator cap.

 

I asked for help. There is nothing wrong against that since there are plenty of knowledgeable people on the ORG.

There were several answers suggested and I was going to take a course of action but do to the fact that at night the auto parts stores are closed....there was no way to get a cap. I wanted to but couldn't. The appointment was for 7 am and the auto parts stopes dont open till 9 am. There was nothing to lose by going to the dealer. It is covered under warranty and they are ordering the part and they will test the system again with that new cap they get in. But for the next week I will get a new cap while I wait for the warrantied cap to come in. SOOOOOO I AM BUYING JUST one cap as suggested by other org members.

I THANK EVERYONE THAT HAS GIVEN ME INPUT and Maybe this has helped others. If this ever does pop up on someone elses car then they will have an idea on what to do.

NOW.....DO YOU HAVE ANY OTHER COMMENTS TUFF1?
For everyone else I will keep you posted on why my radiator hose colapses when the car cools down (after being turned off) and if it was actually the CAP. THANK YOU ALL THAT HAVE GIVEN THEIR UTMOST HONEST SUGGESTIONS. As far as the grounding kit the dealer said nothing about it. If anyone wants a parts list and pictures of what I did let me know and leave an email address.

 

TTZ cap man, the stock cap is .9 bar where the TTZ one is 1.4 bar pressure.

 

Where can i get that cap at? (TTZ)

 

Nissan dealer should stock it, unless the dealer doesn't repleace the radiator caps durring service (30,60,90k service) while doing a coolant flush.

 

http://www.courtesyparts.com/Merchan...de=21430-RS012