Our 109 'Suffering Sophie' idles a little high, and at the same time the thermometer rises worryingly near the red. Have recently replaced the thermostat and the water in the radiator is not boiling by any means. When I give rev the engine she goes back to idling at the correct revs, and the thermometer drops back to mid-level. Have a feeling it maybe a wiring problem? Any ideas?? Anyone??
dominicbeesley
Well-Known Member
Is this a petrol. If so check that there isn't air getting in around the carb. Nip up all the bolts on the carb to manifold, any adapator plates and all the manifold bolts exhaust and inlet. If air is getting in it will give odd symptoms like this and tend to run lean (not enough petrol in fuel/air mix). This tends to make the engine get hot.
Then with the engine running try squirting brake cleaner around that area. If the revs change you've got a leak. Be careful of flash fires though! Have an extinguisher to hand! Only do this if you're sure of yourself!
If this is a diesel everything I've said above doesn't apply!
When you replaced the thermostat did you get a 74 or 82 degrees one? I got an 82 by accident and the normal temperature position has gone from the middle of the "N" to just above it and towards hot....
Then with the engine running try squirting brake cleaner around that area. If the revs change you've got a leak. Be careful of flash fires though! Have an extinguisher to hand! Only do this if you're sure of yourself!
If this is a diesel everything I've said above doesn't apply!
When you replaced the thermostat did you get a 74 or 82 degrees one? I got an 82 by accident and the normal temperature position has gone from the middle of the "N" to just above it and towards hot....
ElmrPhD
New Member
Hi Dominic,
Sorry to rob this (short) thread, but...can you clarify where exactly the needle sits with the 82 degree thermostat?
I've transplanted a Peugeot turbodiesel into my 109 and its 88 degree thermostat puts the needle up worringly high. Am just wondering how high I should feel comfortable about letting it go...
Mr Bond, it would indeed be good to know if you are talking about a petrol or a diesel in order to offer (possibly even valuable) advice.
Cheers,
Steve, in the NLs
dominicbeesley
Well-Known Member
On mine it sits just above the N for normal on 82degrees and bang in the middle on 74. "Modern" engines often run a bit warmer. Also, as billggski says guages are pretty innacurate as are the regulators on series vehicles.
On old vehicles you just get used to whatever it normally reads and worry if it changes!
On old vehicles you just get used to whatever it normally reads and worry if it changes!
