Clicking From Engine After Spark Plug Work

[dave_1]

have i overtightened the plugs and now they are clipping the pistons? the head has been shaved for more compression. Its a recently rebuilt motor. RB20

solved see below

Edited November 29, 2007 by dave_1

[Guilt-Toy]

did you cross thread it and losing compression through the plug hole?

[r32sky_line]

Take the plugs out and have a look.

You would have to shave the head a fair bit for the plugs to hit the pistons

[H@ME]

wow! hope you haven't dropped anything in the plug hole while plug was out. However like th epost above you'd have to shave alot off the head for it to be hitting the pistons. GL hame

[GTRgeoff]

Is it a clicking or a snapping noise?

Snapping would be arcing of the spark from the coil pack to earth. I've seen it a few times.

[hazerb30]

I had a clicking noise in my first car. didnt tighten the plug up properly

[dave_1]

found it after some isolation of parts. Turned out being the clutch fan bearing had siezed up and it was clicking round. I took the clutch fan off and ran the motor and its perfect. couldnt believe it. The fan was rooted, i've bought a 12in thermo fan to run instead.

Thanks for all the replies guys.

[STATUS]

doh, when will we see the overheating thread with that thermo ....

[dave_1]

why would u see an overheating thread?

ive run my rx7 13b turbo with a thermo for years, with no problem

[sh@un]

if an RB engine didn't need a viscous fan, don't you think the factory would have just used an electric one?

[skiwhine]

if an RB engine didn't need a viscous fan, don't you think the factory would have just used an electric one?

probly because viscous fans are cheaper, on the holden V8's you ditch the viscous fan and run ford thermos when ya get the motor pumpin n jumpin

[Cubes]

I ran 2 x 12" thermos and the bastard overheated in traffic and would push coolant out the overflow in general driving on 35+degree days.

Good luck with 1 x 12" thermo.

[skiwhine]

i think the most important thing is the shroud design....

[Cubes]

Definitely is..

As I said before I ran 2x12" thermo's; they were mounted directly on to the rad. Upon pulling them off it was scary to see how little of the radiator air was being pulled through. Dust marks left behind looked to be ~25-30% of the radiator.

Shroud or not a single 12" won't pull enough cfm to cool sitting in traffic on a 35+degree day with the a/c on. With the a/c off you may get away with it as the viscous pulls bugger all air on idle. Mine tends to slowly increase engine temps until around 92-95degree's then holds steady when idling in peak hour with the viscous and a/c on.

[GTRgeoff]

I run a Ford twin shrouded thermo on an ally radiator and you can feel at the back of the car when it pulls on, and pushing through the ranges it sits perfect on 84deg and 83 at idle. Without the fan traffic driving pushes temps to 102, just for info' sake.

So who wants to debate that they don't work when properly researched and fitted?

Sure you are going to waste your money with a simple gutless unshrouded design, but for $200 from Autobarn you can have a decent setup.

And given that the last 2 viscous fans on the race car started to self destruct I'd be inclined to go with thermos.

[wolverine]

what thermostat did/do you use geoff?

[Cubes]

Geoff,

You run the El thermo's or AU's?

[GTRgeoff]

Standard thermostat, but using an insert 90 on 80 off temp switch.

Using the Au fans, so with a 45mm ally (50mm tanks) it has 4mm clearance to the radiator and 4 mm to the PS pulley but cannot hit either short of a catastrophic impact.

[Cubes]

Thanks Geoff.

A mate of mine used a 'modified shroud' AU thermo and they really did pull some air; noisy as buggery but worked damn very well.

[GTRgeoff]

Yep, had to really work slow to get the fit perfect but worth it in the end. I've never had trouble with thermos but bloody viscous fans are nothing but dramas on the track.