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Autosolo boiling PAS fluid.

336 Views 37 Replies 3 Participants Last post by  triplehazard955
So I did my first Autosolo in the 1.4 yesterday and despite getting sunburnt it went ok.

my times per lap were on the pace however out of 10 runs I went the wrong way on 7 of them. 馃槀

I did however notice that I was boiling the PAS fluid as it was coming out of the top of the reservoir cap, so I think either a PAS cooler is reqd or relocation of the reservoir.

I have seen the below on Sico website and was wondering if the PAS setup is the same on the ST as the 1.4 as this kit is for the ST?



Thanks in advance.
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I used to do autosolos in my ST and I had one of those and it did a good job of keeping the fluid cool

The ST has a different reservoir to the other Fiestas but if the diameters of the fittings are the same it should still work, but if they aren't you'll need a different adapter and hose and fittings. The kit isn't hugely complex it's really only the ali bracket to secure the cooler that's bespoke.

One thing to note is, if it's supplied with heater hose (like mine was), it won't last very long with the power steering /ATF fluid before it softens, you need something resistant I think I used a good grade of fuel hose

The other thing is sometimes its just the fluid spilling out of the reservoir and not actual boil over, mine continued to leak under hard driving even though the fluid wasn't hot.
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Thanks mate.

That鈥檚 really what I needed. I think I鈥檒l get one anyway and some better fuel hose. TBH I could probably just buy a cooler and make my own bracketry.

I didn鈥檛 want to open the cap and stick my finger in as I wasn鈥檛 sure if it would boil over even though it鈥檚 not a pressurised system.
Yes there's very little pressure at the return hose, all the high pressure stuff is in the heavy duty lines elsewhere. You can run the engine with the cap off.

Apparently ATF fluid boils at 300-400 degrees C so it's more than likely not boiled hah, although theoretically it could still expand with heat and flow over, but also doubtful as the level doesn't vary by much. Don't think moisture in the system is a factor either since as far as I know it's not hygroscopic.
Thanks fella.
It appears to actually have one already, albeit a crude Ford one.

Human body Slope Font Triangle Parallel


Interestingly do the ST's not have this? If it works i'd expect it to stop the heat issues with the ST.

I guess it just makes it easier to just mount a better cooler and cut the existing pipes and join to existing pipework with straight hose barb couplers and Jubbly clips.
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@_jimmy_

I have noticed there is no seal on the inside of the PAS resevoir cap. Do you know if there should be one?

I'm sure i can certainly find something to use, but i dont want to put a seal on if there isnt supposed to be one.

Thanks
@_jimmy_

I have noticed there is no seal on the inside of the PAS resevoir cap. Do you know if there should be one?

I'm sure i can certainly find something to use, but i dont want to put a seal on if there isnt supposed to be one.

Thanks
Hi tripplehazzard,
Theres no seal ( like the one on a brake fluid reseviour ) but it should have an o ring ( about 30mm dia) on the cap.
Al
Mint thanks mate.

maybe it does have one and I鈥檓 a dumbass (probably)

perhaps I鈥檒l just get a new cap to at least stop spillage from going all over the belts (or a thicker O ring)
Mint thanks mate.

maybe it does have one and I鈥檓 a dumbass (probably)

perhaps I鈥檒l just get a new cap to at least stop spillage from going all over the belts (or a thicker O ring)
Hi tripplehazzard,
Just thought I'd send a pic of my pas cooler, might give u some ideas.


As you can see its pretty simple, just welded two bars down off the bumper and then rubber mounted.

This is how it should sit in the grille, so should get plenty of air to cool it

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2
Looks spot on mate.
Did you buy a kit or did you buy the cooler and fittings separately?

what size fittings and cooler did you get and where from?

is it BSP fittings?

thanks.
People have fitted the OEM ford coolers, I think mountune even used to sell it as a mod for the ST. The cooler with rows will be much more effective.

Yeah the cap just seals with an o ring, poorly. Even with a thicker one fitted the damn thing still leaked somehow. I was going to relocate it with a Focus style one located near the battery but never got to do it.
Cheers chap.

I鈥檒l probably do a relocation and a cooler so I鈥檓 covered.
Where did you do the autosolo by the way?
Lymm services is my favourite one, quite a small venue compared to some but they make the most of it.

The ST was pretty good for it, having a quaife diff helped, though the shocking turning circle didn't particularly help.
It was at Lymm Truck Stop mate. There is another there on 18th June.

The 1.4 was ok. I came dead last due to going the wrong way 7 times out of 10. However the times I went the right way I was on the pace.
Each time you get the circuit wrong it鈥檚 an automatic 100sec penalty (I guess to stop you driving straight to the finish line)
As top speed isn鈥檛 an issue it did well but they put me in the modified/rally car class as it鈥檚 stripped and caged.
Whereabouts in the NW are you Jimmy?

I鈥檓 in Cheadle area if that鈥檚 anywhere near you?
I'm near Bolton. Yeah, doing a wrong test will completely ruin your results. The penalty for a wrong test is maximum time, where maximum time is the quickest time in your class plus 30 or 40 seconds or something, it varies with the supplementary regs at each event. Also worth remembering that you can return back to where it went wrong and do the correct route if you realise and you won't get a penalty. I've been at Lymm about 3 or 4 times in the past, I was there in June last year
Yeah it was good mate. TBH I didn鈥檛 realise I鈥檇 gone the wrong way as it was my first time and I just wasn鈥檛 tuned into it.

I got it by the end of the day but it鈥檚 a different track each time I think.
Seen this on the EBay -


Will 1/2鈥 BSP fittings be a suitable size for the cooler?

im not sure what size the hoses are but I鈥檓 sure I can get 1/2鈥 hose or the nearest metric and tap into the existing with straight hose barbs (reducing if necessary)

cheers
Seen this on the EBay -

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Will 1/2鈥 BSP fittings be a suitable size for the cooler?

im not sure what size the hoses are but I鈥檓 sure I can get 1/2鈥 hose or the nearest metric and tap into the existing with straight hose barbs (reducing if necessary)

cheers
HI TRipplehazzard

Pretty sure these are the adapters I ended up using
Seen this on the EBay -


Will 1/2鈥 BSP fittings be a suitable size for the cooler?

im not sure what size the hoses are but I鈥檓 sure I can get 1/2鈥 hose or the nearest metric and tap into the existing with straight hose barbs (reducing if necessary)

cheers
Hi Tripplehazzard,
I'm sure the adapters I used were AN10 female to AN6 off the oil cooler into AN6 90 degree barb into the hose
The problem I found was getting the hoses out through the radiator shroud without them being below the level of the front bumper
I can't upload a pic atm, will try again later
Al
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Ended up ordering this in the end guys.


I figured by the time I鈥檝e bought the cooler, fittings and hose it鈥檚 probably not far off the cost of this.

I鈥檒l also probably relocate the PAS reservoir whilst I鈥檓 at it and change for a different type that doesn鈥檛 leak.

are all the pipes to and from the reservoir low pressure as it looks like there is thick and thin hoses to the existing tank and possibly a clip in type on either the flow or return.

if I have to replace that hose with longerone and use a jubbly clip would that be an issue?

Thanks
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