Jump to content


Photo
- - - - -

Zetec And Electric Water Pump Still Overcooling


  • Please log in to reply
54 replies to this topic

#1 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 05:33 PM

new Spec 2.0L zetec with 243bhp

         55mm coolex polo derived rad

         raceline water rail

         davis craig ewp 115 electric pump and controller

 

old spec as above except standard zetec mechanical pump and 82deg thermostat

 

In the old spec the car would take for ever to warm up to the 82deg sat on the drive idling, if you pulled away before getting to temp it could take 15miles to get to 80 and if you were on a long steady run the temp would drop to just below 80deg, i want it to be 85deg. getting stats to fit, in the right temp is getting awkard as they are old ford xflow fitment so i thought i would try something different

 

i have now fitted the new ewp pump and controller, and the problem is worse!! the cars warms up at idle a lot quicker, it sits there holding temp perfectly with the fan and pump doing what they should.

I go for a drive and boom the temp drops from 90 to 75 and will not raise until i stop driving then it creeps up to set point and maintains it. 

 

This car used to have an old polo type rad which used to maintain the temps just but was always marginal when you started to raise the pace it would heat up and barely keep things cool, hence the change to the coolex 55mm, 

 

Does the rad have to large a volume and too large a surface area? every time the pump pulses, is it shooting a large volume of cold water round the system which is to much for the engine heat produced? 

 

Is the pump sending to much water round the system? both mech and elec pump did the same effectively. only difference is the mech had a stat the elec dosent its meant to be controlled electronically. 

Is the raceline water rail causing some sort of issue? 

 

Is the fact that car has so much torque and power now that i,m not driving it hard enough to generate enough heat? 

 

both coolex and davis craig recommended the rad size and pump to suit the car and its engine spec.

 

Not sure what to do now any ideas and opinions please

 


Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#2 theduck

theduck

    Club Secretary

  • Committee
  • 3,116 posts
  • Location:Birmingham
  • Car type:Sierra S7

Posted 13 September 2017 - 05:46 PM

Have you tried blocking off part of the rad?

#3 nicko

nicko

    Wheely good builder!

  • RHOCaR 17
  • 1,273 posts
  • Location:Sheffield
  • Car type:2B Plus, 2.0i

Posted 13 September 2017 - 05:50 PM

Just a thought... have you tried covering part of the rad to see if that helps? If so then the rad could be too good.
Nick
2.0i 2B Plus. Collected 30/10/04, SVA passed 24/05/07, GRIN factor...... off the scale

Posted ImagePosted Image

#4 mower man

mower man

    mowerman

  • RHOCaR 17
  • 4,116 posts
  • Location:worksop
  • Car type:1992 Mazda mx 5 1600

Posted 13 September 2017 - 05:51 PM

As above gaffer tape the rad in small increments, had to do this on a friends Formula Ford for winter meetings


Edited by mower man, 13 September 2017 - 05:52 PM.

MOWER MAN the older I get the faster I was ! but getting faster after having my knees refurbished

#5 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 05:52 PM

Yes it did help a little bit. But it still wouldn't maintain set point

Edited by DanE, 13 September 2017 - 05:52 PM.

Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#6 cb750

cb750

    Wheely good builder!

  • RHOCaR 17
  • 1,149 posts
  • Location:Aldridge, West Midlands
  • Car type:3A

Posted 13 September 2017 - 05:55 PM

Have you tried contacting Davis Craig and asked them if they have come across this before?

#7 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 06:01 PM

Yes I've emailed them, not ringing as they are in Australia. Awaiting a response
Also spoke to coolex who haven't come across the issue and find it very strange!

Edited by DanE, 13 September 2017 - 06:02 PM.

Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#8 richyb66

richyb66

    Wheely good builder!

  • Area Secretary
  • 1,811 posts
  • Location:Tamworth / Pwllheli
  • Car type:2B wishbone 4.6 V8

Posted 13 September 2017 - 06:05 PM

7 days





Oh no, that's Craig David
Warks, Worcs, W Mids area meet. Last Wednesday of the month 7PM onwards, January to November. Malt Shovel Pub, Coventry Road, Nr Stonebridge, Coventry, CV7 7HL

https://maps.google....ingdom&t=m&z=15

Entrance to pub car park is off the A452 Chester Road heading North 50 yards from the island.

#9 kevin the chicken

kevin the chicken

    Wheely good builder!

  • RHOCaR 17
  • 802 posts
  • Location:Chatteris, Cambridgeshire
  • Car type:16v vauxhall series 7, Sylva Leader with Pinto

Posted 13 September 2017 - 06:38 PM

Are you 100 per cent sure the gauge is accurate? If the stat or the electronic gizmo aren't giving the correct temperature it seems a bit strange. Surely one of them should work properly. They should control the engine temperature and compensate for over cooling by closing off the flow. Or that's what I thought anyway. Years ago loads of people would blank off parts of their radiators in the winter.

#10 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 06:54 PM

3 temp sensors all reading the same, pump controller, gauge and ecu

Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#11 Longboarder

Longboarder

    Old Stager

  • RHOCaR 17
  • PipPipPipPipPip
  • 7,986 posts
  • Location:Plymouth.
  • Car type:New 111

Posted 13 September 2017 - 07:38 PM

Have you removed the old mechanical pump? If its still in circuit it will have an effect.

 

Can you do a diagram of the cooling circuit please. Include all parts, pipes etc.

 

Nigel


Thought for the week.
Forget healthfoods. I need all the preservatives I can get.


#12 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 08:06 PM

Plumbing is bottom rad outlet to electric pump inlet, pump outlet feeds into mechanical pump (impeller removed) that then exits head to race line rail which in turn feeds out to top rad inlet. No stat

Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#13 Longboarder

Longboarder

    Old Stager

  • RHOCaR 17
  • PipPipPipPipPip
  • 7,986 posts
  • Location:Plymouth.
  • Car type:New 111

Posted 13 September 2017 - 08:27 PM

I'm guessing the sensor for the pump is in the rail close as poss to the outlet on the back of the head?

 

Nigel


Thought for the week.
Forget healthfoods. I need all the preservatives I can get.


#14 DanE

DanE

    Electrickery master

  • RHOCaR 17
  • PipPipPipPipPip
  • 6,450 posts
  • Location:England
  • Car type:SSC Stylus Supercharged

Posted 13 September 2017 - 08:44 PM

No pump sensor is in top hose, gauge and ecu are by the head, but they all read similar

Ssc stylus with a supercharged zetec 242bhp and 253ft lb of wheel spin.

 

 


#15 theduck

theduck

    Club Secretary

  • Committee
  • 3,116 posts
  • Location:Birmingham
  • Car type:Sierra S7

Posted 13 September 2017 - 09:39 PM

Just a thought, have you got an oil cooler fitted?