V6 Head Gasket Failure
- Thread starter The Mad Hat Man
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av i mist summat here?
its nuffink to do wiv hp - its to do wiv overeating and prospective hgf!
its nuffink to do wiv hp - its to do wiv overeating and prospective hgf!
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they are good units, Treev. The benefits are that the pump is controlled by the water temperature, not the engine speed and can also be set-up to stay on after the engine is switched orff, thereby reducing heatsoak.
The 20HP increase is if you remove the original water pump from the engine, which takes a certain amount of power from the engine - whether it is 20hp or not is debateable, however it is unlikely that Hippoo owners would remove the original water pump - just have the electric one as an additional unit - so therefore it would take EXTRA power (albeit electrical) to drive it.
If the original one was removed then, there would be no load on the engine to drive it - would there? The electrical one only takes a load when it is required.
The 20HP increase is if you remove the original water pump from the engine, which takes a certain amount of power from the engine - whether it is 20hp or not is debateable, however it is unlikely that Hippoo owners would remove the original water pump - just have the electric one as an additional unit - so therefore it would take EXTRA power (albeit electrical) to drive it.
If the original one was removed then, there would be no load on the engine to drive it - would there? The electrical one only takes a load when it is required.
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the idea is to only pump what is required - the CD pump is thermostatically controlled and adjusts its flow-rate (pumping speed) according to predetermined temp settings that you can set up. It also can pump after engine shut down to normalise the water temp, reducing or eliminating heat-soak as found on the KV6 engines (and poss 1.8K).
That way if the air temp is low (and therefore cooling efficiency is good) then less water gets pumped - in the middle of summer in a traffic jam then a high flow rate is required. I dont think the radiator needs changing - it seems to be adequate for most needs.
I believe the problem (with the KV6) is that the engine heat-soaks after the engine is switched off - the normal pump is no longer running, so water boils in the heads!
That way if the air temp is low (and therefore cooling efficiency is good) then less water gets pumped - in the middle of summer in a traffic jam then a high flow rate is required. I dont think the radiator needs changing - it seems to be adequate for most needs.
I believe the problem (with the KV6) is that the engine heat-soaks after the engine is switched off - the normal pump is no longer running, so water boils in the heads!
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Dearot - yu gonna do the elecky pump (and NPG) mods?
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from what I can find out - most manufacturers that use a transverse (wot a stupid idea) V6 use electric water pumps - if not as the main pump, then as an additional unit.
ie.VW's and Renault to add to the list.
Not only on "V" engines either -
http://cgi.ebay.co.uk/ws/eBayISAPI....00031713033&rd=1&sspagename=STRK:MEWA:IT&rd=1
ie.VW's and Renault to add to the list.
Not only on "V" engines either -
http://cgi.ebay.co.uk/ws/eBayISAPI....00031713033&rd=1&sspagename=STRK:MEWA:IT&rd=1
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sorry treev - but....
My opinion (if yu aint guessed) is to avoid hippoos...
but......
some aint failed
My opinion (if yu aint guessed) is to avoid hippoos...
but......
some aint failed
mondo
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The Mad Hat Man said:sorry treev - but....
My opinion (if yu aint guessed) is to avoid hippoos...
but......
some aint failed
One thing to say to that comment...!!!!
DATSUN!
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mondo said:One thing to say to that comment...!!!!
DATSUN!
its a bit like that here at the mo - rainin' Datsun Cogs!
(the old ones are the best)
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dearot said:Why dont you do it MHM? I dont think its hard. I would do it but unfortunately I dont have much time and $$ till end of april next year...two overseas trips
I will if someone wants to pay me to do it
bear in mind - I no longer have a Hippoo about £200-£240 for lecky pump & controller plus mounting metalwork and labour - about £350-400 shd be about right.
dearot
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The Mad Hat Man said:I will if someone wants to pay me to do it
about £200-£240 for lecky pump & controller plus mounting metalwork and labour - about £350-400 shd be about right.
It looks like everyone are giving up on Hippo
What is the flow rate (min and max) of the original water pump on hippo?
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dearot said:It looks like everyone are giving up on Hippo
If yu get a bad one - there is only so much money you can throw away before it no longer is viable, but the more people that investigate known weak areas, the more chance of reducing the risk or even finding a fix!
As for flow rate - this is, of course dependant on engine revs. Not sure the figures are published - will have a look-see.
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no the mech pump does not block the flow - at least not by much - see below...... (and NO - i dont have shares! )
The revolutionary designed Davies Craig Electric Water Pump (EWP) is a performance accessory that improves engine cooling and temperature control, giving increased power and/or improved fuel economy
The EWP can either assist the original mechanical pump, or replace it.
As a replacement it outperforms the old pump by saving power and matching coolant flow to engine needs.
The EWP80, with its flow rate of up to 80 litres/min, is suitable for vehicles with an engine capacity of up to 5 litres
The recently launched EWP110 with its greater flow rate of up to 110 litres/min is suitable for larger engines, and also smaller capacity more highly tuned engines, 4WD's and medium sized trucks
The EWP benefits classic cars where the original cooling system is inadequate for modern day traffic, or for modern day fuels which burn hotter. And running the pump after shutdown minimises heat-soak problems.
The EWP is ideal for competition cars where racing engines at high revs need maximum cooling efficiency, as does cooling the engine after the race when heat-soak can do its worst.
There are three installation options available:
- Firstly, the EWP80 can be installed as a complete replacement for the existing mechanically driven pump, in which case an EWP Controller (separately available) should also be fitted. The existing pump is deactivated or, in many cases may be removed, in which case belt runs are shorter. The EWP Controller governs water pump speed to permit a wide range of temperature settings so that installed benefits may be varied between power gain and fuel economy.
- Secondly, the EWP80 may be fitted into the existing cooling system wired to either a manual or a thermal switch to provide a very significant boost to the original system. The thermal switch we recommend for this purpose is the mechanical switch, part number 0401.
- Thirdly, the pump can be fitted for continuous running, either as the sole pump or to assist the mechanical pump. This method of control is most suited to competition engines, running sustained high revs. Normal use running may result in engine temperatures below ideal operating levels. This option is also useful for cars running on LPG, which tend to run at higher operating temperatures.
It is important that, in all cases, care should be taken by the installer to select the most appropriate option for each application. Maw Solutions Ltd are happy to advise!
The ‘Smart’ Controller, which is used in conjunction with the EWP80, electronically senses engine heat and adjusts the rate of coolant flow accordingly, even after engine shut down.
see also http://www.mawsolutions.com/documents/ewpinfo.PDF
)The revolutionary designed Davies Craig Electric Water Pump (EWP) is a performance accessory that improves engine cooling and temperature control, giving increased power and/or improved fuel economy
The EWP can either assist the original mechanical pump, or replace it.
As a replacement it outperforms the old pump by saving power and matching coolant flow to engine needs.
The EWP80, with its flow rate of up to 80 litres/min, is suitable for vehicles with an engine capacity of up to 5 litres
The recently launched EWP110 with its greater flow rate of up to 110 litres/min is suitable for larger engines, and also smaller capacity more highly tuned engines, 4WD's and medium sized trucks
The EWP benefits classic cars where the original cooling system is inadequate for modern day traffic, or for modern day fuels which burn hotter. And running the pump after shutdown minimises heat-soak problems.
The EWP is ideal for competition cars where racing engines at high revs need maximum cooling efficiency, as does cooling the engine after the race when heat-soak can do its worst.
There are three installation options available:
- Firstly, the EWP80 can be installed as a complete replacement for the existing mechanically driven pump, in which case an EWP Controller (separately available) should also be fitted. The existing pump is deactivated or, in many cases may be removed, in which case belt runs are shorter. The EWP Controller governs water pump speed to permit a wide range of temperature settings so that installed benefits may be varied between power gain and fuel economy.
- Secondly, the EWP80 may be fitted into the existing cooling system wired to either a manual or a thermal switch to provide a very significant boost to the original system. The thermal switch we recommend for this purpose is the mechanical switch, part number 0401.
- Thirdly, the pump can be fitted for continuous running, either as the sole pump or to assist the mechanical pump. This method of control is most suited to competition engines, running sustained high revs. Normal use running may result in engine temperatures below ideal operating levels. This option is also useful for cars running on LPG, which tend to run at higher operating temperatures.
It is important that, in all cases, care should be taken by the installer to select the most appropriate option for each application. Maw Solutions Ltd are happy to advise!
The ‘Smart’ Controller, which is used in conjunction with the EWP80, electronically senses engine heat and adjusts the rate of coolant flow accordingly, even after engine shut down.
see also http://www.mawsolutions.com/documents/ewpinfo.PDF
