[doc] Re: thermo time switch part numbers

["Mike Bosworth" <mike.bosworth@xxxxxxxxxxxxxx>]

Hi Steve

After five mins of running the car the coolant temp should be way 
above 35 deg C,its suprising how hot the coolant gets in a short 
period of time, the switch will then remain 'open'and hence no 
operation of the cold start valve, its an easy circuit to check for 
continuity and its correct function.

I would really check for the correct operation of your engine cooling 
system before you take the car out on the road. When you say you ran 
the car for 'quite a long time' ...how long? After 15 - 20 mins the 
car should be up to its full running temperature 180-190 F.( BTW the 
temperature gauge in the car is not an exact science, but the needle 
should be on or just above the line that is in the centre between the 
100 and 220 F marks ) at this point the water pump thermostat will be 
open and with all coolant pipes to the radiator and back hot, the rad 
fans will be kicking in and out to keep the temperature in this 
operating range. If the fans start coming on and your gauge is still 
reading 'cold' then i would suspect your temperature guage sender. 
this screws into the inner front corner of the right hand side 
cylinder head. 

Personally i would change out an origional 'otterstat' anyway just as 
a preventitive measure.

The origional blue relay has rightly been taken out and in your case 
replaced by some wire, a common 'fix' that never got 'sorted' at the 
factory, these wires really should be fused and of a reasonable 
thickness to cope with the starting current going through it to the 2 
rad fans. If yours look a little 'home made' and dont have in line 
fuses  then i would replace this with any one of a number of fixes 
dependant upon your budget .

Suggestions

http://tinyurl.com/7zgl8

http://tinyurl.com/ap92o   ( i personally have a 'fan fail' type 
thingy half way down the page thats made with a relay base $20 ) 
looking at 'upgrading' sometime .

Maybe someone knows of a UK source or can make some up?

Regards

Mike
#2001
403







--- In doc-uk@xxxxxxxxxxxxxxx, "blackaddertoo" <blackaddertoo@xxxx> 
wrote:
> hi
> 
> thanks Mike.
> 
> i will check but wondered after 5 mins the ground through to the 
> cold start valve should still be there? water would be cool still.
> 
> i wondered if the bimetalic strip inside is functioning correctly 
ie 
> once it activates, it does not reset for ages or sticks untill 
stone 
> cold.
> i suspect this part as the car starts fine when powering up the 
cold 
> start valve.
> can't be too much wrong know with my cold start system.
> 
> incidently, ran the car for a few quite a long time, water pipe to 
> left of engine got fairly hot temperature guage barely crawled up 
> scale, just above cold. no fans kicked in (have jumped fans-they 
> work)
> 
> how long should this engine run from cold to normal temp and then 
to 
> fans on if left idling?
> am a bit nervous as i don't want to overheat.
> 
> i plan on changing the temp sensor for guage and fans asap.
> Also the relay in the left hand corner of my 'box' is missing and 
> some jumpers installed-not sure whats going on here!.
> 
> now in the process of removing the front bumper-sheared bolts etc.
> 
> regards
> 
> Steve
> doc 370
> vin1621
> just want that MOT!!
> 
> 
> --- In doc-uk@xxxxxxxxxxxxxxx, "Mike Bosworth" <mike.bosworth@xxxx> 
> wrote:
> > Hi Steve
> > 
> > Its a Bosch 0280 130 214    ( DMC Part 102125 )As you prob know 
> this 
> > part is only supposed to operate the cold start injector when the 
> > coolant temperature is below 35oC, after 5 mins of running the 
> switch 
> > will not be closed due to the higher coolant temperature. BTW the 
> > switch itself is grounded by the threaded part that goes into the 
> > water pump, ie not a good idea to seal it in with PTFE tape as 
> this 
> > may cause this not to work correctly. Use a multimeter at cold 
and 
> > then again after 5 mins to confirm the correct operation of this 
> > switch and save yourself £20 :)
> > 
> > Regards  
> > 
> > Mike
> > #2001
> > 
> > 
> > --- In doc-uk@xxxxxxxxxxxxxxx, "blackaddertoo" 
> <blackaddertoo@xxxx> 
> > wrote:
> > > Hi all
> > > 
> > > Please does anyone know the part number for the thermo time 
> switch?
> > > 
> > > i assume volvo (been there today but having trouble finding it)
> > > 
> > > my car starts from cold (day plus)
> > > 
> > > then does not start after 5 mins (jump the cpr/cold start valve 
> > > connectors, then starts ok)
> > > 
> > > hence will change the tts switch anyway in case its faulty.
> > > 
> > > also does anyone know the cross reference for door seals (have 
> > > emailed Paul Salisbury because ages ago was to be in the DOC 
mag 
> > > Pauls parts)
> > > 
> > > thanks for any help
> > > 
> > > regards
> > > 
> > > Steve








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