Audi A2 Coolant Pressurised Problems

Rodthemod

Member
Audi A2 Coolant Pressurised Problems
Hi same old story
2001 1.4tdi 106,000 miles full Mot unmarked bodywork
Coolant system pressurised - even after 3 days non use - does not de pressurise at all - fitted new blue cap on coolant bottle - release and Whoosh !
Top radiator hose always hard - gets hot but radiator and bottom hose always cold
Both Heater matrix pipes get hot - no heat in cabin
Webasto diesel heater fires up ( spray pipe freeze on sensor in front of radiator ! ) no heat in cabin
Have bled webasto - a little Air
Have bled radiator top hose - Air for 3 seconds
Gauge gets to 90 degrees - do over 60mph and rises - drop to under 60 mph -
back to 90 degrees
Could it be
Water pump - how to test
Thermostat
Heater matrix - garage flushed this and coolant system said not blocked ( car the same as before it went in !)
Cylinder head ???? - if It is this do not mind spending say £500
£100 skim head
£100 cylinder gasket kit
£200 local labour Newcastle
£100 other
ANYONE KNOW REPUTABLE HEAD SPECIALIST IN NEWCASTLE AREA ?
But will this solve problem - 2001 1.4tdi 106,000 miles full Mot unmarked bodywork no other problems - owned since May 2003 on 18000 miles
Would not like to sell like it is
Scrap ?
Part exchange ?
Actually runs okay if not pushed hard
How long after gauge reaches 90 degrees should heater start to work
Bet this is a common problem !!!
May just use for up to 20 mile trips in future !
Sniff test at local garage next
Cambelt and water pump changed 26,000 miles ago at Audi - had to force them to change pump - charged me but not convinced they did this - got car home and needed 2 litres pf G12 - WILL NEVER GO TO AUDI AGAIN
Any feedback appreciated
 
http://www.volksentre.co.uk/

Personally never used them, but the wife's a2 came with documentation of works carried out before my purchase, which incidentally was a failed water pump.
Maybe a little closer than swift which I would recommend too.

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Last edited:
Car has symptoms of failing head gasket
Several owners have tried the sniffer test but I don't recall it's ever given an early warning of a failing gasket.
Heater should be blowing hot by gauge reads 90, if not before.
Heater may be a separate issue relating to the motorised flaps, which control airflow and heat distribution, sticking (common problem) This would show up on a diagnostic scan.
If Audi charged for a replacement water pump I'd believe them.
Thermostat on the TDi is a bog standard design and can be checked by heating in a pan of water and watching stat open. Best if you have a thermometer.
Difficult to check water pump as the (not to) common problem is the impeller coming loose and spinning on the shaft when hot / at higher engine speeds

Cheers Spike
 
Does sound like a headgasket issue - The radiator hose being hard after 3 days of no use sums it all up for me, if the coolant is cold the hose should be soft - the pressure can only really come from a failed head gasket...
 
Hi all
Yes it is the head
Now had it skimmed etc - leaking between two pots
Will be refitted next week with new cambelt and water pump - not working
Had a sniff test - which turned yellow - sign of head gasket failure
I could smell exhaust fumes when sniffing coolant bottle with top off
 
Kudos for persevering with this, can I ask who took on the job for future reference.

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