240 Water Temp Gage

I lived with the old temp compensation board problems for years with
my '89 240. I finally replaced it with the IPD jumper setup, and could
not be happier. I feel I get to see real, actual readings now. I can
see the needle deflection when the thermostat opens, and I can see
deflection when I open the heater control valve. This was impossible
with the compensation board system. Anybody that's riding the fence on
this issue, act now.

 

Could you post a link for this procedure?

Les


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Consilience, The Unity of Knowledge

Remove frontal lobes to reply from a NG

 

Is this same temperature compensation doodad fitted on 740's? I've just
looked at the IPD site on the 240 area, for what this board does, the temp
guage on my 740 behaves just like the IPD site describes for the 240, I.E.
it rises ok, then seems fixed in the middle, no matter what, I've connected
another sender (two wire type), and simulated overheating, the guage still
sticks in the middle, then shoots up, but sinks ok when the sender cools.
This can't be right, what on earth is the point of a critical guage that
actually hides important information?

Ken P.

 

Why cannot it be right Ken? We Volvo owners have had to put up with this type of
temperature gauge for quite a few models now. It is intended to indicate when
the engine is cold or a fault has developed which could result in damage to the
engine.
It was and is not meant for the more technical among us so if you want to be
able to interpret the readings more easily I would check with IPD themselves.
Their URL is http://www.ipdusa.com and they are based in Portland, Oregon,
USA.

Cheers, Peter.


: Is this same temperature compensation doodad fitted on 740's? I've just
: looked at the IPD site on the 240 area, for what this board does, the temp
: guage on my 740 behaves just like the IPD site describes for the 240, I.E.
: it rises ok, then seems fixed in the middle, no matter what, I've connected
: another sender (two wire type), and simulated overheating, the guage still
: sticks in the middle, then shoots up, but sinks ok when the sender cools.
: This can't be right, what on earth is the point of a critical guage that
: actually hides important information?
:
: Ken P.
:
: : > JShreve wrote:
: > > I lived with the old temp compensation board problems for years with
: > > my '89 240. I finally replaced it with the IPD jumper setup, and could
: > > not be happier. I feel I get to see real, actual readings now. I can
: > > see the needle deflection when the thermostat opens, and I can see
: > > deflection when I open the heater control valve. This was impossible
: > > with the compensation board system. Anybody that's riding the fence on
: > > this issue, act now.
: >
: >
: >
: > Could you post a link for this procedure?
: >
: > Les
: >
: >
: > --
: > http://www.stuffmongers.com
: >
: > "Homo sapiens, the first truly free species, is about to decommission
: > natural selection, the force that made us.... Soon we must look deep
: > within ourselves and decide what we wish to become." Edward O. Wilson
: > Consilience, The Unity of Knowledge
: >
: > Remove frontal lobes to reply from a NG
: >
: >
: >
: >
: >
:
:
: ---
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: Checked by AVG anti-virus system (http://www.grisoft.com).
: Version: 6.0.672 / Virus Database: 434 - Release Date: 28/04/2004
:
:

 

Found it here:
http://www.ipdusa.com/ProductsCat.aspx?CategoryID=1455&NodeID=4668&RootID=629

I note that this is an '86-on issue, so doesn't affect the '82 dash that
I'm putting into my '80. Not sure about the dash I got out of an '81 for
the sedan speedo - it's got '87 written on it in oil marker across the
back of the top.

I'll have to compare the two when I pull the '82 out of the wagon. Now
I'm curious.

 

Peter, thanks for replying, I do appreciate your point re. what
non-technical drivers want to see; but, from my own experience of once
having a well running 240, whose temp gauge told me everything when needed,
but usually floated very close to centre; I'm intrigued why Volvo would want
to damp out these usually very small fluctuations, to such a huge extant,
that it seems the engine has to almost be on fire, before the 'compensation
board' conceeds to allow a reading to occur.
Seeing a steady (sometimes rapid) climb from the normal temperature
indication is much more intuitive and give better reaction time, than a
gauge that looks absolutely normal until near catastrophe, then rockets up
after it's far too late.
I have looked on the IPD site for any reference to 'fixing' the 700's gauge,
but can't seem to find anything, I can feel another DIY job coming on.

Bye for now, Ken

 

The temprature compsating board was ment not to alarn Volvo drivers. It also
governs the gas gauge so if you encounter a steep incline the gas gauge
doesn't drop dramatically. In case of a sever temperature rise it does
respond quickly. Go with the Volvo temp board and treat it like any other
car. The B230 F engine is bullet proof.

 

'82 would use a speedo cable, '87 has electronic speedo. It should be
easy to tell what's what.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

This feature is built into the gauge on your 740. It's design is to
stop customers from complaining about the minor, normal rises in the
gauge readings on hot days.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

Thanks all,

I think I'll be endeavouring to find and kill or neutralise this
compensating board on my 740, when I get round to it, on the assumption that
it will be different from the 240 one, I'll post my results for all
interested, I really do like to know how my engine is behaving.

Bye for now, Ken

I think I'll be endeavouring to find and kill or neutralise this
compensating board on my 740, when I get round to it, on the assumption that
it will be different from the 240 one, I'll post my results for all
interested, I really do like to know how my engine is behaving.

Bye for now, Ken

 

I guess that the circuit board on the back of the dash would be different
for the electronic speedo? Both of the dashes that I have are cable
speedo types, so I don't know what the scribbled 87 means. Perhaps they
marked different clusters with different numbers for the assembly line?

 

Yes the circuit boards are completely different. I've never noticed any
numbers written on the clusters I've removed.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)