Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Its not running a long serpentine now Matt.



The sketch shows how it is today, compared to how it was originally. The belt is a 1260mm long one, so nothing OTT.

I'm 100% convinced that the impellor is attached to the pump. If I run the engine without the pressure cap on the header tank, there is a high pressure supply of water returning to the tank from the swirl pot on the sensor housing, and when I raise the revs, the flow of water increases significantly. I've tried clamping this pipe off too, and it makes no difference to the overheating.

Matt, do you run the bypass hose from the thermostat housing to the sensor housing?

[dobuy]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Yep, have to say I am with Matt on the shorter belt option, easy way to do this is to get one of those eccentric pulleys and just bolt it to the timing case on one of the larger M8 bolt holes, then you can adjust the belt tension with the pulley

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I can't fit anything aft of the centre line of the crankshaft (ie towards the rear of the engine) because of the interference from the chassis rail in the Fiesta.
I could fit an idler in place of the water pump pulley, and then do away with the c-max tensioner at the front/top of the engine, but only if the new pulley would allow me to tension the alternator drive belt.

Tonights job is to remove the rad and thermostat cover and if its not too much hassle, the water pump.
I dont have much space between the pump and the chassis rail, hopefully enough to draw the pump out of the side of the engine.

I'm going to blank off the bypass hose that runs across the front of the block, and the stat, and have one last go with the mechanical pump. Just to satisfy my own curiosity.

I'm not convinced about Grahams theory that the water pump is too high. Look at the Ford diagram, and the water pump is significantly higher than the bottom of the rad, more so than my present setup.

[cossie matt]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I'm pretty sure Graham meant the height of the pump WASN'T an issue as long as you have a reasonable head of coolant above it. (though I stand corrected if i'm wrong)

I don't run a bypass at all Gray. That is all blanked off in what I would call the original pump chamber, internally. I've never actually used any of the original Ford stat or pump parts, I just cut them up and modify them.

My electric pump is at pretty much the same height as the mechanical pump would be too. My system couldn't be simpler. Pumped out of the bottom of the rad into the block (same place as Neils for picture reference) then out of the back of the head via a water rail into the top of the rad, job done. 100 mile rallies 15-20 mile stages in all conditions 9300 rpm for the last 4 years, can't say better than that really.

1260mm!!! Thats's huge!!! I think mine is inly 590mm. When you junk the mech pump, there is a very conveniant M8 bolt that holds the front cover on pretty much between your crank and alternator which would take an idler no problem.

Like I said, visit Steve on the Kent cams stand and he can advise on pump control etc and you can see the bits on the display engine too.

[Graham]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I'm pretty sure Graham meant the height of the pump WASN'T an issue as long as you have a reasonable head of coolant above it. (though I stand corrected if i'm wrong)

that 100% what i meant

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

All done.


Water pump impeller is 100% attached to the pump shaft.

Stat removed.

Bypass hose removed.

Belt refitted.

Rad refitted.

Full of water and ready to test.

Just needs the airhorn refitted. Job for tomorrow.

[cossie matt]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Nice one Graham. That's pretty much the same now as mine other than the swirl pot, but you could easily clamp the hose to take it out of the equation once it's bled, and the fact it's mechanical pump still. I hope it works, I really do, it'll be a great weight lifted I'm sure.

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I'll run it up later today. Don't think the neighbours would have been very keen on me starting it up at 9:15pm last night with the garage door wide open.

On the bright side, I stripped and rebuilt it all in under an hour, so if any F1 teams are looking for a mechanic, I think I'm suitably qualified now.

I reckon it'll run fine now, and I wont need the electric pump. (Famous last words)

Q) Without a stat, what temperature should I aim for with the ECU controlled cooling fans? 60C?

[cossie matt]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I'd say 80 DegC mate, that's what mine cuts off at.

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

FIXED

Engine warms up, radiator fan cools it down. Simples.

[Graham]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

cool literally !

[cossie matt]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Brilliant mate.

I'm guessing it may be that bypass pipe you were running from the stat housing to the back of the head??? Or that stat is doing funny things?
Really glad for you, what an annoying problem to solve.

[team_zi]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

I reckon so Matt. The bypass hose was the path of least resistance.
It's a huge relief to get it all running properly. Just need to connect the laptop and lower the fan's On temperature.
thanks for all the suggestions. Fixed it without spending a fortune too.

[Tristan]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Excellent work , and also delighted you were able to figure it out yourself!

[dobuy]

Re: Grahamb's Mk1 Fiesta XR2 Duratec HE Hillclimber

Brilliant, sometimes the solution seems so simple with hindsight
Next stop Maximum Attack