16inch davies craig

[Ryosuke Takahashi]

im havin overheatin issues with my car does anyone know a place in Sydney that will stock a 16inch thermofan for cheap because ive been to supercheap and other stores and it seems the price varies

thanks

[Oz]

hey Ryosuke I have a 16" thermo on my R31 & works a treat

I might be able to get u one cheap but will have to look into it + u pay freight cost.

send me a PM if u want me to check into it (brand new by the way & not hot)

I am using a old mits colt thermo switch for the cut in/out, 85 deg (give/take) 5deg+/- 74 deg +/- 3 deg,

I had a 38mm exhust pipe made up thats 2" long placed in the top hose with the switch/nut welded into the pipe, as the clutch fans on the RB's run a heat clutch in them so there is no way to get a switch in there any other way + plastic tank on the Rad means the copper probe is not the best idea as u can bust the top rad outlet trying to over do the clamp to stop leaks

also the switch is a 1 pin switch so u will need to earth the pipe out so once the switch opens it earths out through the pipe

Hope that helps a little

Cheers Mike

[Binky1970]

Autobarn at Villawood have them, I bought one there for my mustang as well as the thermal control sensor. Can't remember the cost of it tho.

[Ryosuke Takahashi]

ok i ll try and autobarn...pm sent Oz your explaination is abit complicated for me lol

i just had a fmic installed and now the car overheats....tried tightening the belts,removed thermostat,flushin but doesnt help with the engine temps

[Binky1970]

sounds like you have an airflow problem.

[Ryosuke Takahashi]

so would it be the fan?

ive posted on ausrotary and nopistons.com and they had told me thet stock fan is the best set up and they think its the radiator

[Binky1970]

well if it has only just started after putting a cooler in then it sounds like there isn't enough airflow through the cooler to the radiator.

will a 16" thermo fit your radiator or will it overhang the edges ??

[Ryosuke Takahashi]

thats what i think aswell i havent measured it yet but lookin at pics i think it just fits(http://ausrotary.dntinternet.com/forums/vi...pic.php?t=52641)

ive also removed my whole air con setup and left one of the fans which was used for the air con it helps but its noisy and the amount of air is not enough so it must be the fan thats the problem

[RB30-POWER]

A 16" thermo isn't going to cool better than the factory clutch fan anyway.

A working clutch fan will pull way more cfm of air than those crappy thermos ever will.

I don't think this will fix your problem.

[Ryosuke Takahashi]

hmm now since you mentioned that....im stumped

[RB30-POWER]

Excuse my ignorance, im not a daily visitor to this site, but I can try to offer some suggestions to you.

What car do you have?

When did it start overheating?

[Ryosuke Takahashi]

mazda rx7 88turbo

it started overheating after the whole engine was put back in incl the radiator

it had a fmic installed along with the removal of the air con

tried a number of things such as removal of thermstat,tightening pulley and flushin radiator and waterpump but havent really helped

i spin the clutch fan but it seems to be ok

[RB30-POWER]

If the motor has been fully rebuilt they do tend to run a little warmer due to them being tight. Probally not to this degree though.

When you start the car when its cold can you hear the clutch fan (should be louder when cold because the clutch oil runs to the bottom of hub). My point is it should be engaged when you first start the car.

After a couple of minutes it should dis-engage and go quiet. It should then re-engage when the motor comes up to temperature.

If the hub is functioning and your sure of that, it may be one of two problems.

If the radiator was removed and allowed to dry out so to speak from sitting empty while motor was getting worked on. It may have had some internal corrosion/sludge flake off the tanks and block some of the rows effecting cooling capability.

If you reverse flush the radiator, (the opposite way that they water normally runs) you may blow any debre/crap out of the radiator thats causing possible trouble.

If you are sure the radiator is fine as well. The next thing would be to look at the FMIC and how much it is impeding flow to the radiator.

If it is a large bar and plate and the only way to the radiator is through the cooler, my guess is this may be your problem.

I've fitted heap of coolers with never having any negative effects to engine temp but there has always been an alternate way for the radiator to get air flow, not just from through the cooler. (Not familiar with the setup you have so cant comment)

The only other things it could be is faulty water pump (unlikely) excessively retarted timing which causes manifold to glow red hot and overheat motor. (unlikely).

You have already mentioned that the thermastat is ok?

[Binky1970]

something i noticed when I put the thermo on the mustang, the engine revved a lot more freely due to the weight of the standard fan and other bits being removed from the rotating assembly.

[Oz]

hey ryosuke if its only since the motors been rebuilt as RB30 power said they do run hotter after a rebuild but what was done side seals apex the hole lot with water seal kit??????

I would be sus of the motor build a bit, also has it only started after the cooler was fitted or after the engine was reconed????

AH FORGET I ASKED LOL I AM BLIND

[Oz]

yeah binky I have noticed the same thing with my car it the car idles a lot smoother & also the car runs a lot cooler then with the clutch fan I am running a inline switch in a 38mm diameter pipe thats 2" long in the top hose & it works a treat had to many probs with the copper prob leaking out around the top rad hose & didn't want to try & nip it up more as the RB 's run plastic tank's & was worryed about busting the tank outlet.

ALSO Ryosuke if u do go with a thermo fan KEEP THE FAN SHROUD on the rad just cut it a little so the thermo fan will fit on under it, it means that the fan will pull air through better, by the way sorry about my 1st post I though u had a line

[Ryosuke Takahashi]

lol RB30 power i dont really understand your explaination that much but when the engine was put it and i tried turnin the engine over i heard funny sounds from the clutch fan but now it doesnt make noises nomore...the engine has not been rebuilt as i had comp tested it and it was almost perfect comp

i think this will be my plan....get one of my old radiators service and rebuilt it....if it still overheats i ll go the thermos.....can someone explain to me the push and pull types of thermos?

yeah i want one anyone wanna trade?

[Ryosuke Takahashi]

RB30 power yes im pretty sure nothing wrong with the thermostat because it opens up...but ill be puttin it back in....is that ok even if the thermostat has a few holes drilled??

[Binky1970]

a "push" thermo goes in front of the radiatorand pushed air throguh it, a "pull" one goes behind the radiator and pulls air through it.

they are both the same thermo with the polarities reversed.

[Ryosuke Takahashi]

ohh ok is there anyone here thats used the clutch fan and had 2 thermos at the front of the radiator? or would this be too much of an electrical load?