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Guys
Ever since I bought my HZ tonner it has had cooling problems. It's an Overlander, but that doesn't matter - it's a factory 308, TH400 and the 4WD gearing and tyres ends up making it approx 3.36:1 gearing.
It has a stock 3 row radiator, shroud and a radiator overflow bottle behind the battery. When I got it, it had a 4-blade steel fan and it used to get hot. I changed the radiator out for a new 3-row and a 5 blade solid fan plus a new thermostat. I tried to fit a stock viscous fan but couldn't get any to fit without hitting the factory shroud. It still played up and got stinking hot when in 4WD and I constantly had to top up the overflow bottle. Eventually the red motor water pump cried 'enough' from the workload of the big fan. I bought a new WB-VSIII water pump, stuck a VN viscous fan and a HZ 6cyl taxi fan shroud on it and now it's a different beast. It idles properly, no longer flares between transmission shifts, gets about 20% better fuel economy, no longer uses ANY water, revs heaps more freely and is heaps quieter. It still gets hot, but that is soon to be fixed by the installation of a WB X-flow radiator and factory shroud.
Amazing difference, simply with the installation of a new $50 water pump and viscous fan. As well as having a heaps bigger bearing the WB-VSIII water pump also has a barrel impeller rather than the red motor style's fan type impeller. It also has a steel plate sandwiched between the pump and the impeller. They are the same price as the red motor one, so I recommend to everyone to use one of these instead. All you have to do is use a shorter spacer as the later pump is longer - you also need the WB-VSIII water pump pulley. |
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C'Mon Byron,
20% increase in fuel economy changing water pumps is a bit steep to believe!!!!!! Was your old one seized up solid???
I'd like to see any water pump that made that much difference.
If it was running that hot that it wouldn't idle proper
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The fan is the difference, not the water pump.
Idling problem was nothing to do with temperature, it was the fan.
Flaring of the auto again had nothing to do with temperature, especially as the transmission isn't cooled by the radiator. It was the fan c |
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In over 30 yrs of mechanicing and working on hi performance street cars + a few race cars, I've never seen a fan give the effects you are describing.
I've tried a lot of different fans to see what works best for performance and reliability & found electr
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It was one of the Overlander's shortcomings - or to be more truthful of a 5litre commercial. Low lateral speed, low revs, climbing temperatures. Anyway, what I described is what has happened. Gone from about 190kM per 50L or so of LPG to about 230kM or s Edited by user Friday, 19 May 2006 5:32:28 PM(UTC)
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Ive been using Ford EF twin thermo fans with shroud to keep my 454 vette and very heavily cammed 350 HK cool. The HK has a particularly narrow radiator. Aftermarket (chineses) copies of the factory Ford fan unit are often cheap on ebay.
Water pumps wit
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quote:
Originally posted by Sandman
C'Mon Byron,
20% increase in fuel economy changing water pumps is a bit steep to believ |
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quote:
Originally posted by Simmo
Ive been using Ford EF twin thermo fans with shroud to keep my 454 vette and very heavily ca |
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