KAD44 overheating

[malc60]

I have sunseeker with 2 KAD44,s both engines running at 95-100 degs, tried the obvious, its in the med, is there a chance the intakes could be slightly blocked on the legs? PLEEEESE

 

[simonfraser]

guess its in the water 24/7 ?
plenty of growth on the legs ?

jump over the side and clean them up.

i have had hard shelled sea creatures in the raw water filter in the UK.

 

[CLB]

In the Med there is a very high chance that the intake might be blocked. Lift the legs and scrub around the quite small water intake ports. If that doesn't work, you'll have to work you way around the cooling system a bit at a time. Should run at around 85°C give or take a few degrees.

 

[julians]

Could be any of the following:-

- blocked water intakes
-worn impeller
-blocked heat exchanger (when my d4 starts to run hot,its always due to blocked heat exchanger - needs unblocking every 3 ish years)
-faulty thermostat
-kinked or blocked hose.

My money is on the heat exchanger

 

[rlw]

I would check the readings with an IR gun before you start. Corrosion can increase the readings. Iearned this the hard way.

 

[Portofino]

I would check the readings with an IR gun before you start. Corrosion can increase the readings. Iearned this the hard way.

This is good advice .
I had 96 with a kad300 ,
IR gun said 86 - hmm
Turned out ver d Gris on the guage spades under the dash .
Emmery paper / WD 40 —- back reading 86 .
Corrosion of any contacts - sender / harness / gauge spades = inc resistance- and it reads high

 

[petem]

Emmery paper / WD 40 —- back reading 86 .

Using emery paper isn't great but tempting if that's all you have. Contact cleaner spray plus a contact cleaner pen will do a better job.

 

[simonfraser]

Yep, mad.

Fuel gauge the same, the more corrosion the more fuel you have !

 

[Portofino]

Using emery paper isn't great but tempting if that's all you have. Contact cleaner spray plus a contact cleaner pen will do a better job.

It is a day or two before a buyers surveyor , takes it out for a sea trial :encouragement:

It passed btw

 

[kashurst]

This is good advice .
I had 96 with a kad300 ,
IR gun said 86 - hmm
Turned out ver d Gris on the guage spades under the dash .
Emmery paper / WD 40 —- back reading 86 .
Corrosion of any contacts - sender / harness / gauge spades = inc resistance- and it reads high

my KAMD temp gauges read 8 degs high - I will try cleaning the gauge and sender contacts. cheers

 

[malc60]

thank you