hot running

[michael-king]

Greg,

Start the car from cold with the radiator cap off and see if there is bubbling in the water, this will show gas esacping from cylinders into the cooling system and indicate a gasket thats allowing seepake into the cylinders.. the other option is if its blowing and allowing water into the oil.. check to see the oil in the pan is not milky... i would suspect option 1 given your symptoms. Hopefully im wrong.

[gregs302]

I,m getting confused now,ran car from cold,no cap on, fine ,no bubbles ran for 30 mins and could still put my finger in tank.replaced cap,closed bonnet temp rose to 200.turned off then water bubbles out of overflow.I am filling header level to top of top hose.previouse boil overs left top hose empty.using 13lb cap.can someone explain.oil is not milky

[H, Sunny 65]

Hi Greg
Starting to sound like you have a thermostat problem, but could be water pump, could be a blocked radiator. so many options.
I think, you have to go back to basics, does temp rise from cold and then drop when stat opens? Is rad same temp top and bottom? Are any of hoses colder than other's ? A very simple and cheap try, is to take middle out of thermostat and try it. Hope thats some help.
Harry

[gtsmrt]

I,m getting confused now,ran car from cold,no cap on, fine ,no bubbles ran for 30 mins and could still put my finger in tank.replaced cap,closed bonnet temp rose to 200.turned off then water bubbles out of overflow.I am filling header level to top of top hose.previouse boil overs left top hose empty.using 13lb cap.can someone explain.oil is not milky

Hi Greg,

How long until the nationals? It would be a shame for you not to go. The over flow would just be expansion and it may be that the tank is filled too much. The thermostat is a cheap and easy swap, but wouldn't that give you higher cruising temps as well? How was your distributor timing?

Regards, Robin.

[GranthamTiger]

Hi I was wondering if anyone out there has tried a product called WATER WETTER ?. It is claimed to drop running temperature by 17 degrees C, and help to speed up warm-up time (if a Tiger needs help). John.

[michael-king]

Products like water wetter have adbverse effects on the cooling system sometimes, high resistance to heat.. but can accelerate corrosion. Ultimately they are a bandaid solution, using those to get the temp down means you have not really solved the problem.

[bigbob]

I've used water wetter to great effect. It is a last resort, but does work well. Dropped temp by about 5-10c.

[Tomaselli]

anyone out there has tried a product called WATER WETTER ?

Yep, I use it and certainly does help. It seems to be popular with the modern racing fraternity too. Bit expensive if you go via a specialist, best buying in bulk online.

Though would agree with the earlier post, no idea what it's doing for corrosion. Not tried it long enough to see any real ill affects.

[gregs302]

Managed to make the national and back with no hickups.Great turnout of Tigers and rootes cars,even met guy who bought my Alpine.As for the hot running, i ended up asking David (David Herning Motorsport).Fitted phenolic spacer,slight ignition adjustment and removed all heat mat i put in footwells and gearbox tunnel.Hey presto super cool again,ran all the way at 80c.I would say if your running a 302 with ally heads and tubular headers ,suffer the heat on your reet and legs,the heat in engine bay needs somewhere to go.Another observation was the number of mk1's converted to alternators,getting rid of that lump of a dynamo.Thats next on my list,but i will replace the bracket with one designed by David,should improve air flow as well.Also on list is new rag top,quality of some at Blenheim were vgood

[gtsmrt]

Hi Greg,

Great to hear that you made the national and found some answers to the heat problem. I saw some of the pictures that were posted of the national...BIG turn out. I noticed you are thinking of going for an alternator and I recently did the same. If you are interested, I have a plan (from a very helpful bloke in the US) which you can use for making a bracket. Take a look at my link and see what you think. Here is the link: http://rides.webshots.com/photo/2739745 ... 9124soZqAB

PM me your email if interested.

Regards, Robin.

[bigbob]

Why bother with a bracket, use some stud into the threaded inserts on the front of the cylinder head to pivot alternator off. Much neater installation & uses a shorter fanbelt. I can't find how to display photos, but there was a short article in Cats Whiskers a year or 2 ago, with photos.

[gregs302]

Thanks Robin,that pic is very similar to what David suggests and does look neat.Bigbobs idea sounds good as well,but would the alternator sit much lower to headers restricting air flow around them and absorb heat from that area,which is what i want to avoid.Many thanks Greg.

[gtsmrt]

Thanks Robin,that pic is very similar to what David suggests and does look neat.Bigbobs idea sounds good as well,but would the alternator sit much lower to headers restricting air flow around them and absorb heat from that area,which is what i want to avoid.Many thanks Greg.

Hi Greg,

If you mounted the alternator as suggested by Bigbob, the position of the alternator would depend upon the adjusting bracket length. Using either Bigbob's idea or one similar to mine uses a shorter 'V' belt. The method I used actually extends the alternator further out closer to where the dynamo sits. I can use either a 1220 or 1205 'V" Belt.

Regards, Robin.

[Mal]

Hi guys.
My generator has just started to sound very noisey, so remembering alternator install discussion on this thread, I thought I needed some help. Two ways of solving the install are discussed. I have had a look at your install from the link you provided Robin and it looks good. Then BigBob sugested mounting one off a stud from the face of the heads. I have also found an install on the net. He used a Toyoto Corolla 1980-82 1800cc #27060-28020 alternator and made a bracket. Depending on the alternators mounts will determine the way in which you need to mount it.
So I was wondering what car the alternators you have used, came off or was for.
Thanks Mal.

[gtsmrt]

Hi Mal,

My alternator came off a Ford 351. It is a Bosch 40Amp internally regulated unit and the mounts of the alternator made it very easy to adapt. You could basically adapt any alternator you choose, but choose something that parts are readily available.

Regards, Robin.