Hi Guys.
Just an update to my problem I had.
Those of you who forgot about my 1200GX that runs hot on the highway forum please run a search on it and you will find my previous post in the archives.Sorry....

I installed a genuine Nissan termostat.
My old one was faulty.
When pressing to open the termo it got stuck halfway and when you press just a little harder it would then fully open.

I ran it this weekend on the highway at a constant 110 km/h.
When reaching a hill it would rise to exactly the halfway mark.
when going downhill it would go down to a milimeter just beneath the middle mark or stay on the middle mark.
It was about 31 degrees celcius.
What is your comment on it guys?
Must I still replace the radiator or are you experiencing the same?
I am thinking of doing this test again but at 120 to 130km/h.
When it goes to 2/3 I will slow down to 110km/h and see if it goes down on temp.
Maybe also do a temp test when it reaches this high temp to get the genuine temp of the radiator water.Maybe my gauge is faulty or the temp sensor.
If this is not too serious I will replace the radiator later as it stays at 1/3 in town where I drive most of the time.

I would however like to drive on the highway.
You all know how fun it is to drive a datsun just for a weekend cruise somewhere to a small nearby town to get away from all the work and stress...

Hi Ryno

If you go to my Profile, you will see that I also posted something about my 1200GX running hot on the highway.
There you will also find other response to this question of yours.
To answer your question.
Mine is also not keeping up to the job.
Planely because it is so hot here.
I have'nt changed mine yet but can tell you only what advice the radiator shop gave me.
Get a radiator that has more of those small pipes per inch in the radiator.
The radiator must have more dencely packed fins between the small pipes.These fins absorb the heat away from the water as it sirculates through the small pipes.
To be save get a triple core.This is what I am going to do.
Hope this helps.

dattodude

Yes. I know that I am a worry'er.
But my datsun I want to get 100% or at least 95% right.
My 185/60 R13 cost me double what I pay for one 12 incher and I do not want to lose them just because I was lazy in fixing a stupid problem.
I know I have posted alot of small things that I want solutions for, but I am that kind of person that if something is not right it must be corrected.
Dodgeman, of course, knows about this.
I have send him many mails about stuff that worried me and I wanted answers for.
He always patiently answered me back and I thank him for it.
Actually I thank everyone here for answering my worry'ing questions everytime.
But is'nt it what this site is about?
Asking questions and then getting answers?
Remember, we are driving cars who's creators have maybe long passed away.

Hi to all.
I would like to find out if anybody have had similar problems and how did you solve it.
My Datsun 1200GX has the problem that the front wheels is losing tread more on the outside of the wheels than the middle or inside.
When I last had my wheel alignment checked, the guy said that he cannot correct it.It is something to do with the front suspention.
I cannot remember the specific suspention part he mentioned that was out or incorrect.
I now have 185/60 R13 that cost way much more than my 12 inchers that I had on before.
I do not want to lose them due to stupid wear.
Can anyone give me a solution.
My brother-in-law-to-be is a panelbeater and he said they have equipment that measure everything and they can fix this problem by bending the shockabsorber outwards to bring the wheel to the correct level.
I feel it will damage the shockabsorber.
He said they have done it to many cars.

Nicholas.

You must not keep us in the dark anymore.
Please tell us more about what you have done to your engine.
I do not know about the other people here, but I am very curious.
I have send you mail aswell with no response.

Good luck with you buggy and racing.

dattodevil.

Can you please tell more about the procedure and how it works?
Is it not counterweights on the crank?
How will it work on the block?

b310gx.
I am soooooo glad I am not the only one with harmonic problems.
My standard 1200GX also have harmonic frequency at 5600 to 5800rpm.

Today while driving to work a guy thought he was trying to be quick in his standard A14 bakkie and I guess he revved to 5800rpm to get good speed past me in first gear.
My window was down next to the guy.
HOW THE HELL do the guys get it right here at datsun1200.com to rev standard A12 and A14 engines to 7000rpm.
That A14 was getting definately harmonic distortion at those revs as it did'nt sound very good. It wanted to climb out infront of the engine bay!!

Hi to all
I have received news sunday that we here in south africa will not get leaded fuel from 2006 onwards anymore.
Can anybody please give me advice on how to prepare my datsun for it?
I know that we will be able to get additives to add to the petrol that will give it the effect of leaded petrol.But I want to fix the problem not to do this adding all the time.
Will performance or pinging be affected when we do have to use unleaded fuel?
My volkswagen also runs on leaded at the moment.The mechanics said to me not to use unleaded fuel it will make it ping.What now if I must go over to unleaded in 2006?
Any suggestions? I know that it is not a Datsun, but here is alot of experts to ask anyway.

Those of you who read my Forum on "engine vibration when revved hard", I know now that it is the flywheel that caused the problem.

Thanks.

A quick update to my problem.
A friend of mine drives a 1995 Nissan Sentra 160GX.1600cc 16valve carburator engine.
I do not know if the name if these nissans are used there in Australia, but the main thing is that it is a Nissan.
The weekend we drove and I mentioned it to him about the datsun.
He said "Lets see what mine does".
We then drove in second and he flored it to 6500rpm where his car's redline is.
I think this small vibrations that I talked about was as Dodgeman mentioned harmonic frequency.Just as we reached 5500rpm it got exactly the same vibration and little harmonic type noise fro the engine as I got at 5600 to 5700rpm.
Although his was a little bit quieter than mine. But, remember.
Its a couterweight crank and much more damping material than a old 1977 datsun body.His disappeared at +-5900rpm and then the engine sounded asif it wants to climb out.But again not so loud as my datsun.I think this is just a Nissan/Datsun thing and that I placed too much emphasis on it.The vibration I think is the flywheel that I am feeling through the gearlever when reaching 5800rpm.
Thanks for all your replies.
But I think I got an answer locally.

Dodgeman.
I feel to disagree with you.
Me and my dad overhauled the engine 20 000 to 30 000km ago.
I know we did it the right way as we used a datsun manual.Page by page.
The crank was not removed.Only head and pistons and conrods.
I feel 80 to 90% sure it is the engine's harmonic frequency that we talked about and that the flywheel is maybe out of balance.
If it was the engine it would have made rattles and noises.
I had the window down to make sure it did'nt make noises.
No noises were heard.
I am going to sort out the flywheel and then see if it helps.
I will also ask the mechanic to make sure everything is 100% correct and that I want to come and check things out first before it is assembled.
Thanks for the replies.
It helped me to look at the problem from all angles.

B120dat
Does your engine not have any strange vibrations when you rev it so hard that tells you "Hoi, I am near the end"?

Dodgeman said that my engine might have these harmonic frequency at that specific revs that I said it is at(5600 to 5800).
Does balancing an engine remove these frequencies?

I am just trying to figure ou what is making this strange vibrations and maybe find a way of making it less.

Dodgeman.
I have another question.
Lets say I am driving on the freeway.
Now I must overtake a car and it is just with luck that I must go to the 5600rpm range where the harmonic frequency is.
What then?
I feel if they knew that the car gets harmonic frequency at 5600rpm they should have limited the revs to here during production at nissan those years.
OK something else.
Maybe it is mass production that causes some of them to get the harmonic frequency low and other engines at higher revs.

Dodgeman.Thanks again for your reply.
It is not many times that I send the tach to 6000.
This was my 10th time,give or take, that I have done it.
I think I must keep it max at 5500rpm.
Again, I enjoy my datsun when just cruising.
It is just that I am that kind of person,
If something is not right, I want it right or find out what is causing it.
Thanks for the replies to all.