#1: 206 1.6 90bhp V reg overheating Author: Gray206Glx, Location: Lancaster, LancashirePosted: Sun Jan 06, 2013 12:51 am ---- My 206 overheats on motorways and main roads, when keeping to 60 or more, but I can let off down hills and the temp just seems to drop to normal running temp within 1/4 mile but when I get back up to speed it over heats again within a mile. Unsure of what this is that it could be.
Also I am unable to get engine to rev between idle and 1700 rpm under no load.
It's ecu is mp7.2 with air con that doesn't work. I've had it plugged up and everything looks ok
#2: Re: 206 1.6 90bhp V reg overheating Author: Timon2210, Location: PalestinePosted: Sun Jan 06, 2013 2:14 am ---- start by replacing the thermostat and coolant as a start,because you may have a faulty one,be carefull of high temp. it damage the head gasket
#3: Re: 206 1.6 90bhp V reg overheating Author: Edward, Location: In the garagePosted: Sun Jan 06, 2013 3:15 am ---- On a V plate the radiator could be past its best. They do corrode which removes all the fins from them. With it sat behind the air con radiator it makes it harder to see.
#4: Re: 206 1.6 90bhp V reg overheating Author: jk206, Location: GainsboroughPosted: Sun Jan 06, 2013 7:59 am ---- check all pipes, coolant level and as edward says have a look at the rad as its most probably shot. you may aswell replace coolant anyway
#5: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Sun Jan 06, 2013 9:00 am ---- Does it overheat in stop / start town driving.
Motorway driving at speeds puts strain on the lubrication system not normally the coolant system.
Stop / start town driving strains the water cooling system.
If it is over heating on the motorway but not in stop / start town driving that is a little odd.
Do as the others have said checking the cooling system for leaks, check the radiator for condition, check the coolant level but also make sure there isn't any oily scum in the water header tank. Check the oil level and make sure there isn't any white mayonnaise in the oil filler cap.
I would be suspicious of head gasket starting to fail or an air lock.
Possibly also the ECU sending spurious signals to the engine management system and running excessively lean or over advancing the ignition but these are unlikely. If the first tests and checks don't solve it and it isn't overheating in town driving but is over heating at speed come back here and post again.
#6: Re: 206 1.6 90bhp V reg overheating Author: macca1411, Location: Westhoughton, LancashirePosted: Sun Jan 06, 2013 9:05 am ---- No ones asked the obvious yet.
What temperature are you getting when it starts to overheat?
Is the fan kicking in when it starts to overheat?
#7: Re: 206 1.6 90bhp V reg overheating Author: bezford, Location: darlingtonPosted: Sun Jan 06, 2013 9:23 am ---- Have u done the mesh grill upgrade on the front bumper lately???and is your air filter and housing/piping clear???when did u change air filter and mesh grill if u did???
#8: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Sun Jan 06, 2013 10:10 am ---- Overheating at speed cause by:-
Blocked airfow. Is the radiator clear externally and is the shroud properly fitted?
Lack of coolant circulation due to:-
a) Sticking thermostat (only partially opening.)
b) Failed water pump (the impellers on some pumps can fail with no external indication.)
c) Collapsing water hose - when they get old they get very soft, collapse and reduce flow (usually the bottom one; not the top one.)
d)Air lock in coolant system.
e) Internals of radiator blocked.(reverse flush the system.)
Low coolant level.
Possibly head gasket - get a "sniff" test done.
There are other reasons as stated previously but check these first. Last edited by kandlbarrett on Sun Jan 06, 2013 10:29 am; edited 1 time in total
#9: Re: 206 1.6 90bhp V reg overheating Author: Mattie-RS, Location: A Track near you ;)Posted: Sun Jan 06, 2013 10:24 am ----
bezford wrote:
Have u done the mesh grill upgrade on the front bumper lately???and is your air filter and housing/piping clear???when did u change air filter and mesh grill if u did???
What's this got to do with a overheating cooling system
I had the same model on mine it was the fan wiring that had corroded so it never engaged causing it to overheat, I'd check this and what Edward said
#10: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Sun Jan 06, 2013 10:31 am ---- Mattie-RS: The OP has only reported overheating at speed and despite asking hasn't commented about stop / start overheating. A none working fan ought to give trouble at low speed not at high speed. I know cars can do odd things but a fan being the cause of high speed over heating would be one of those odd things.
#11: Re: 206 1.6 90bhp V reg overheating Author: Gray206Glx, Location: Lancaster, LancashirePosted: Sun Jan 06, 2013 1:13 pm ---- Well, when driving it runs at 95 to 100 coolant fine, not been using any water or oil and I've been checking before each run I have, the thermostat working as it should and I've had it out and checked and opening fully. It's was serviced when I got the car 3 months ago. Around town it's fine and doesn't overheat unless standing.
#12: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Sun Jan 06, 2013 1:33 pm ---- Gary206Gix: 206 usually run at about 80 on the gauge. Yes lower than most cars but that is where they usually sit.
I would do the following:-
a) check there is nothing obstructing the airflow through the radiator and the cowl is in place directing the air through the radiator. (no cost.)
b) run the engine until the fan cuts in. Does it cut in? (check is no cost.)
b) "sniff test"of the coolant for CO gas. This will indicate if there is a head gasket problem (free, maybe £10)
c) chuck a new thermostat at it; despite knowing you have tested it. It is a cheap replacement. (£10 - 15
d) change bottom hose. (< £10)
e) reverse flush the radiator. (free if you catch and reuse the old coolant.) Last edited by kandlbarrett on Sun Jan 06, 2013 1:51 pm; edited 1 time in total
#13: Re: 206 1.6 90bhp V reg overheating Author: Edward, Location: In the garagePosted: Sun Jan 06, 2013 1:39 pm ---- I think the fan cutting in or not is irrelevant. It overheats at high speed. So there's plenty of airflow through the radiator but there is a high load on the engine.
#14: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Sun Jan 06, 2013 1:49 pm ---- Edward: exactly as stated in my previous post. But worth checking while you are there.
#15: Re: 206 1.6 90bhp V reg overheating Author: novatron1_2, Location: fifePosted: Sun Jan 06, 2013 4:19 pm ---- My money's on the thermostat I had a similar problem with my OH's car. The other symptom was it took ages to warm up as the thermostat had jammed partially open, so it would shut enough to allow quick warm up and it wouldn't open enough to cool the engine when under load.
#16: Re: 206 1.6 90bhp V reg overheating Author: Gray206Glx, Location: Lancaster, LancashirePosted: Sun Jan 06, 2013 9:13 pm ---- Kindibarrettt: saying I did all that and it still over heats, what else could it be? As I am unable to idle under 1700rpm this just 1% open on throttle or just normal idle. I'm thinking more along the lines of a senser or fuelling problem as I just remembered and forgot to say when starting this post was that I am only getting round 250 miles to a full tank, that's £60 of fuel.
#17: Re: 206 1.6 90bhp V reg overheating Author: bezford, Location: darlingtonPosted: Mon Jan 07, 2013 6:11 am ---- The reason i asked about grill and filter is because OP mentions overheat then cooling downhill which indicates a possible airflow problem...like a blockage or old filter...
However my priority would be a headgasket check soon as...get them to do the engine gasses in the coolant check..otherwise known as the sniff test...this will tell u 100%either way and is £30or less...then all being well at least this is eliminated...
Its just far too weird for a simple problem...unfortunately id prepare for the worst...but a second hand engine is cheaper than a head job on these...
#18: Re: 206 1.6 90bhp V reg overheating Author: kandlbarrett, Location: SwindonPosted: Mon Jan 07, 2013 6:32 am ---- Your latest update has made me think you may have a leaking injector. The excess fuel from that injector is then making the rest of the sensors think you are over fueling so leaning off the fuel supply and lean running causing an overheat. If this is what is happening then be careful from there to engine siezure or a holed piston is only a small step.
If you can't idle (why didn't you say that before) I would also check the whole of the air intake system for air leaks. That is both loose pipes and split or missing ones. Inability to control idle is usually an air intake leak or failed ICV. An air leak would also have it running lean and over heating.
Before removing injectors for leak testing I would still get the "sniff" test done on the coolant just in case it is the beginning of headgasket failure.
I don't know if Peugeot suffer from it (Alfas do) but some water pumps have a plastic impeller that becomes loose on the pump drive shaft. That isn't a problem at low speed but at sustained high speeds the water doesn't circulate fast enough.
It is really starting to look like you are about to get into removing engine components for test purposes. I don't know what readings you can get from the ECU via PP but most ECU will give fuel delivery to each seprate injector (while it won't show leakage it could highlight a leaning off of mixture to the other 3 injectors) so perhaps a session with a knowledgeable forum user and PP while driving is in order.
If you have put a new thermostat in then that should eliminate that - though I am still suspicious.
Failing that it is possibly a trip to a garage for ECU readings and 4 gas exhaust analyser to see where the fault is. Last edited by kandlbarrett on Mon Jan 07, 2013 5:16 pm; edited 2 times in total
#19: Re: 206 1.6 90bhp V reg overheating Author: macca1411, Location: Westhoughton, LancashirePosted: Mon Jan 07, 2013 6:37 am ----
bezford wrote:
The reason i asked about grill and filter is because OP mentions overheat then cooling downhill which indicates a possible airflow problem...like a blockage or old filter...
However my priority would be a headgasket check soon as...get them to do the engine gasses in the coolant check..otherwise known as the sniff test...this will tell u 100%either way and is £30or less...then all being well at least this is eliminated...
Its just far too weird for a simple problem...unfortunately id prepare for the worst...but a second hand engine is cheaper than a head job on these...
But the air filter has nothing to do with the cooling of the car, although a blocked air filter can cause running problems.
The grill I can understand as changing this to an aftermarket/homemade one could restrict the air flow onto the radiator. Do London taxis still have the mat that drops down over the front grill to increase the engine temperature or have all those now been replaced with modern black cabs?
#20: Re: 206 1.6 90bhp V reg overheating Author: bezford, Location: darlingtonPosted: Mon Jan 07, 2013 10:50 am ---- The engine needs air to cool it and to mix with the fuel so if its starved with a blocked air filter it may overheat but will certainly run like a bag of s**t...
The fact that the car will cool down going downhill could point to a grill blockage or similar as the air circulation will improve going downhill with more air potential coming from under the cars front bumper.engine compartment...but he is letting off the throttle on the hill so both factors contribute to the ease off in temprature...
However i had these symptoms and it was the head gasket blown so check this a.s.a.p.
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