1.6tdi overheating

moon man

moon man

moon man

Soldato
Joined
17 Nov 2003
Posts
5,401
Location
St Breward Cornwall
So i was stuck on the m5, hours and hours, set off engine overheat light, taken to services fresh coolant, bled as good as possible
fast forward to now ...............'still overheating 2014 1.6 tdi diesel

intermittent loss of flow before the stat tries to kick in (heater goes cold)
The stat doesn't kick in , the coolant just rises in the reservoir
ideas ?

airlock I've run with cap off and squeezed hoses also used an extractor pump to draw water through the reservoir return pipe, no blockage
thermostat
reservoir cap, tried a known good one
water pump ,supposedly 2 yrs old but don't trust this info
doesn't really leak but maybe its not pressurising enough
head gasket , no bubbles can be seen with cap off
bag that is in some vag group reservoir's split causing blockage


anyway as i haven't done this for a living since the 80s anymore ideas, its booked in for a diagnosis but i have a coupe of days
if not i will post the outcome next week

tbf i may just get rid of this hateful lump of metal
 
I never had bubbles when I had a head gasket blow/deteriorate and overheating - just excess pressure,
I think radiator cap 3series had an overpressure relief, which was blowing as I opened bonnet, and I left it half unscrewed and drove slowly home 20 miles or so

can you get one of those coolant exhaust gas test kits - I hadn't known about them at that time.

e: had had what I later realised was steam out of the exhaust a while before
 
Last edited:
jpaul said:
I never had bubbles when I had a head gasket blow/deteriorate and overheating - just excess pressure,
I think radiator cap 3series had an overpressure relief, which was blowing as I opened bonnet, and I left it half unscrewed and drove slowly home 20 miles or so

can you get one of those coolant exhaust gas test kits - I hadn't known about them at that time.

e: had had what I later realised was steam out of the exhaust a while before
Click to expand...
ah yes seen those, probably not time to get a test kit delivered ,i think the original overheating may have done some damage, think i would try one of the head gasket sealants if that is the case and do a retail trade in
 
They work just fine.
I’ve seen them used to great effect many many times and my ST225 is still going strong after a can of Steel seal was used.
 
JonRGV250 said:
They work just fine.
I’ve seen them used to great effect many many times and my ST225 is still going strong after a can of Steel seal was used.
Click to expand...
just looking at that, apparently it doesn't mix with red antifreeze but i guess use plain water and after it seals it would be ok to put back in although it doesn't say this
 
Well it ended up been .a breakage on the after market water pump impeller so I've had that changed and a cambelt kit, aux belt ect.
One of biggest worries was that she overheated on the M5 when I had nowhere safe to stop so thought i may have damaged engine driving on but seems fine now
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom