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bobbber · Posted: Sun Jun 07, 2009 12:02 pm Post subject: Cooling

On normal roads 80 degrees, motorway 100. Why is this? Dodgey water pump?
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Fiat Bravo 165 Sport

john 33_16v · Posted: Sun Jun 07, 2009 2:53 pm Post subject:

Hi,

Take it you didn't go to Stanford hall as well then?

My thoughts would be that if the pump is turning at correct speed, i.e belt not slipping then that shoukld be ok. When they go caput they tend to leak and/or make a noise.

Could be blocked veins in rad, but i think you fitted a new one so probably not that?

Thermostat sticking shut? Does the rad and thermo- rad hose get hot?

John
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If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue

bobbber · Posted: Sun Jun 07, 2009 3:02 pm Post subject:

I don't know the answers to any of those things John.... but yes, I have just come back from Stanford Hall.

I had the only 33 and there weren't many people there at all (due to the weather) although it was fine once we got there.

I'll check those things over... Thanks!

Yes, it's got a new thermostat and rad.. perhaps one's on the blink!

Bob
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Fiat Bravo 165 Sport

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

Could it be due to no heater matrix or that the gauge is out?
You could check the CTS output when it gets to 100, not mph and not whilst driving. Laughing

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x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

bobbber · Posted: Sun Jun 07, 2009 6:35 pm Post subject:

bobbber · Posted: Mon Jun 08, 2009 10:58 am Post subject:

I'm working on the premise that it's ok standing still and ok around town, up to about 50 mph, but then at speed on the motorway the temperature goes right up.

Hmmm.... this implies (the around town bit) that the cooling system is working just fine.

Theory : could this be throttle body misalignment? As on the motorway I'm just slightly pressing the throttle which would then open only two inlets with a totally incorrect mixture for a prolonged period (as it's "programmed" for four?)

Bob
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Fiat Bravo 165 Sport

Oggie · Posted: Mon Jun 08, 2009 8:30 pm Post subject:

Firstly Bobber, do you know if the impeller on the 33's waterpump is plastic, if so it could have cracked and when pushed stop spinning when at higher rev's, a quick test would be to start the car warm it up til the fan kicks in then give it a fair bit of steady rev's to see if it does the same. My wifey's 147 had this issue and unfortunatly needed a new pump. Hope its not the problem for you as its practicly d-day Mad

.
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PHAT 33

lee16v · Posted: Tue Jun 09, 2009 8:48 am Post subject:

If the temp isn't rising any more than 100 ie not over heating then it should be able to cope with that surely?

bobbber · Posted: Tue Jun 09, 2009 9:27 am Post subject:

That's what I'm hoping! Laughing

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Fiat Bravo 165 Sport

johnboy · Posted: Tue Jun 09, 2009 3:50 pm Post subject:

bob wire in a switch to the fan.then if it gets to hot turn it on.like it did for the track! Plus flush the system again!
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bobbber · Posted: Tue Jun 09, 2009 3:51 pm Post subject:

Thanks Johnboy.... I've already got a switch for the fan (as the thermocontact doesn't work properly!)

Yes, I'll be flushing and waxing and flossing etc... Wink

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Fiat Bravo 165 Sport

ZeNiTh-PbArM · Posted: Tue Jun 09, 2009 11:03 pm Post subject:

Hi,
Check ignition advance (not enough= overheating), proper mixture (too lean=overheating, can happen at high load if the fuel pump does not have sufficient flow), clogged exhaust (overheating once again)
regards,
zp

JeremyC · Posted: Wed Jun 10, 2009 9:47 am Post subject:

Too much advance will overheat too.
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'93 Black 33 1.7 16v

bobbber · Posted: Wed Jun 10, 2009 9:57 am Post subject:

Chaps, I think it's down to the circuit not pressurizing correctly as the pressure release valve on the cap is always open. I have a replacement coming today.

Still have other leaks though around the hose clips. I think this is due to corrosion on the union joints which then stop the hoses from fitting flush against the metal. Oh well... probably need to run down the unions to a nice smooth finish and then replace all the hoses for new.

Not going to happen before SPA though.... could be interesting.
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Fiat Bravo 165 Sport

john 33_16v · Posted: Wed Jun 10, 2009 1:26 pm Post subject:

One for the kitbag-

But I wouldn't put this sh*t in unless you're in real trouble.

Cheers,

John
_________________
If it aint broke, fiddle with it until it is!
- - - - - - - - - - - - - -
93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue

bobbber · Posted: Wed Jun 10, 2009 1:55 pm Post subject:

Hmmm.... not keen on that stuff John, it's like Holts Stop Rad Leak (or whatever it's called!?!?)

Suppose it could be good to get us out of trouble if need be. This might seal leaks around the ends of hoses?

Pretty sure I've actually got some of this somewhere.

Correction : RadWeld.

Bob.
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Fiat Bravo 165 Sport

lee16v · Posted: Wed Jun 10, 2009 4:27 pm Post subject:

If you get this cap and the system pressurises properly then aren't the leaks going to become gushing geysers?

bobbber · Posted: Wed Jun 10, 2009 4:28 pm Post subject:

Good question Lee! I would think that's logical!

We're having another good tighten up tomorrow morning before we leave...
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Fiat Bravo 165 Sport

lee16v · Posted: Wed Jun 10, 2009 4:33 pm Post subject:

Best of luck mate. All my unions are quite rusty and dont have leaks so maybe a good arnie tighten up will do the trick.

Oggie · Posted: Wed Jun 10, 2009 8:21 pm Post subject:

if it isn't leaking then I would leave it lee, oh shit another thread response too late!! Laughing

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PHAT 33

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

he he he, he said shit lol he he
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x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

lee16v · Posted: Thu Jun 11, 2009 9:34 am Post subject:

JeremyC · Posted: Thu Jun 11, 2009 1:16 pm Post subject:

You do have European breakdown cover don't you?
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'93 Black 33 1.7 16v

Oggie · Posted: Thu Jun 11, 2009 8:30 pm Post subject:

Yep , I do, and paid extra for labour free!!!.
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PHAT 33