Jump to content
SAU Community

Recommended Posts

Hay guys.

My stag has recently started to overheat while sitting in traffic or driving with the air con on, i have already replaced the thermostat and put brand new genuine nissan coolant, the radiator is the next step isn't it or is there anything else that i should be checking ? 

Allso are there any specialists that fix radiators or am going to have to get a brand new one ?

Im really over it at the moment, its an expensive time of year and i have just paid rego, the last thing i need is this...

Any help apreciated guys.

Cheers.

Link to comment
https://www.sau.com.au/forums/topic/300527-my-stag-is-overheating/
Share on other sites

  • Replies 43
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

yeh hit me a few xmas's ago.

original radiator went south as I was driving to the tuners for some work, leaked everywhere and was lucky was just around the crnr - so that added $180 to the bill for a 2nd hand R33 core.

6months later the replacement R33 radiator went south after a hard nights work...

so I bit the bullet & went to a NatRad outlet store, paid around $450 installed for a Koyo radiator to suit a R33

since then the temp has never been an issue. always always under half on the factory guage, even on a warm trackday

one of the best repairs / upgrades Ive ever done. not much wider than stock but oh so efficient. definately been proved (by me) to be damned efficient.

1st thing first, flush and check. repair. but eventually a replacement will be the only option- fixes to a broken radiator are only temporary in my opinion,

with the general age of the vehicle id suggest to replace with a new one straight out so its never an issue ever again

but then again if its only getting warm, you could get by a fair while with a flush./

will try get a flush done, the radiator looks immaculate and the car has only done 67 thousand k's, but if the flush dont work ill get the radiator, do i have to go to a specialist to tell me how blocked it is or will my mechanic be able to do the test and tell me ?

I over heated mine last Xmas going up the Toowoomba range so I had the radiator flushed ($400.oo) no real help.

I then had it cleaned by a specialist they took top tank off and inserted a bar down each core then replaced the top tank $170.oo it has been good ever since. :3some:

If I had done this in the first place it would not have cost me an engine rebuild $8,000.oo. :/ I am now looking at putting in an aluminum one as soon as I can afford it just for extra piece of mind.

My opinion at least get it cleaned by a professional it costs a lot less than a rebuild.

Not a Stagea but bought a Sillycar and on the drive home it boiled. Replaced radiator cap with correct pressure type, still boiled. Took it out and had stripped and rodded out. It was 80% blocked.

Interesting though was my RMR30. I always flushed the radiator and filled it with proper coolant. It did 600k and has been in my MR30 for two years. Cleanliness is second only to cleanliness.LOL

Where do you usually take your car, Eddie? I know of a few places out my way (Parramatta and Hills areas), but nothing about who'd be available in or around the city, unless you look at the North Shore options..

car usually gets looked after by tunehouse is maricville, my mate told me last night that he knows a radiator specialist in st peters so ill go see him on the weekend first

mate if it was the radiator it would get hot when driving and under loads like going up hill like mount ousley. Id be looking at your engine fan operation. Ive replaced a few clutch fan assy in R33s, you can buy the clutch assy for around $110.

It wont hurt to get the radiator flushed, but at least test the fan. Can do this by grabbing hold of it. It should spin freely when the engine is cold, but should be very hard to stop when the engine is up to temp.

The reason i think this is your issue is that airflow provides the cooling when you are moving and the fan provides the airflow when you are stationary.

Bezerk, that makes sence mate, i spoke with my brother this morning and he said the same thing, i will test it tomorrow and if thats the case ill get a new clutch fan assy, thanks for your help guys, i really didnt think my radiator was blocked because i flushed it when i changed the thermostat and all the water was clean coming out of it.

it still might not be the case but worth checking.

Bezerk, that makes sence mate, i spoke with my brother this morning and he said the same thing, i will test it tomorrow and if thats the case ill get a new clutch fan assy, thanks for your help guys, i really didnt think my radiator was blocked because i flushed it when i changed the thermostat and all the water was clean coming out of it.

no one dis-agrees, but this requires the removal of the top tank, costs about $88. all i am saying is check the fan first.

Just because the flush liquid is clean doesn't mean the cores are clean and unblocked. You need to run rods down each core to dislodge solid material stuck in there.
I took the rad out and it cost $80 to pull apart and clean. Get a quote.

yup, I was quoted the same by NatRad for me taking it out and no toptank, in the end being in an apartment I needed drive in drive out, and the top tank was extra. cracked on pull apart along the flat bit behind the cap.

The fan can work perfectly, and if the cores are blocked it will still heat up in traffic with the aircon on. Plug something into your consult port and monitor it, the factory gauge is a normal range or OH SHIT.

When they did the flush on mine they ran a chemical in the coolant for 15min to loosen up any debris then connected there machine between the top hose and the top of the tank and forced the coolant through. The coolant that came out looked to be the right color (not dirty or Broun). When I had the radiator cleaned they said that the radiator was about 80% blocked. I also needed a new top tank that is why it cost $170.oo. What you have to consider is that it is only a single row radiator so it doesn’t take much to block it.

Never had a problem with my Stag in the past, but one long trip did see the temp gauge climb ... I went and bought a 52mm alloy radiator anyway. Its now been thru some 40+ degree days without a problem at all. Best investment. :banana:

  • 4 weeks later...

What was the outcome? Don't suppose it could be a problem with the water pump?

My car is experiencing a tiny radiator leak. I'm thinking it might have the wrong radiator cap. The radiator cap I have is a DORTEC PDR11 0.9kg/cm PUSH TYPE RADIATOR CAP, Are these stock ones? I put on cap from an R31 just to try.

I wonder if these radiator issues are caused by some importers putting in crappy coolant?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
    • OK, so a bunch of trim needs to come off to get to the rear shock top mounts. Once the seat is out of the way, the plastic trim needs to come off. Remove 2 clips at the top then slide the trim towards the centre of the car to clear the lower clip Next you need to be able to lift the parcel shelf, which means you need to remove the mid dark trim around the door, and then the upper light trim above the parcel shelf. The mid trim has a clip in the middle to remove first, then lift the lowest trim off the top of the mid trim (unclips). At the top there is a hidden clip on the inner side to release first by pulling inwards, then the main clip releases by pulling the top towards the front of the car. The door seal comes off with the trim, just put them aside. The the lighter upper trim, this is easy to break to top clips so take it carefully. There is a hidden clip towards the bottom and another in the middle to release first by pulling inwards. Once they are out, there are 3 clips along the rear windscreen side of the panel that are hard to get under. This is what the rear of the panel looks like to assist:
×
×
  • Create New...