cdti temp gauge trouble

[2MUCHGAIN]

150 cdti .
Genuine stat fitted approx 18 months ago ,since then no coolant trouble .
Last week after a 10 mile drive I noticed the temp gauge creeping up and cold heaters ,but when reaching 3/4 the needle drops to normal position and heat returns.
Today , a 5 mile trip ,10 mins engine off ,on trip home needle maxxed out and flashing coolant light .
I was thinking thermostat but opcom shows nothing .
Coolant slightly down ,topped up , let it idle for 10 mins with cap off and the needle sits at 90 ,after less than a mile driving needles up in the red and cold heaters .
Head gasket or not ?

[2MUCHGAIN]

That should read idles at 95 .

Just been back out ,took a couple of mins and the temp was up to 95 on idle then rising as I kept the revs up .

[plasma]

Have you checked to see if the water is flowing back into the header tank? Maybe waterpump?

maybe stat stuck shut?

[2MUCHGAIN]

Ran engine till needles at 90 ,no coolant coming back to tank and top rad hose is red hot ,suggesting the stat is open and working correctly .

Dug some paperwork from previous owner ,June 2015 87000 miles INA cambelt kit and Circoli wp fitted . Car now has 120650 miles.

I`m not impressed with Circoli stuff ,had wp leak on a Rover 45 and my dads old Vec XER had 2 stats fail very early .

If it is the wp theres genuine for £35 and just change pump or do I risk this cheaper kit and pump from Neo ,https://www.ebay.co.uk/itm/Saab-9-3-...QAAOSwz-5ZfGs7

[Dog_Book]

I’d be thinking the water pump has died and allways fit genuine with these either from dealer with the club membership card or GPS as a lot of Neo stuff isn’t genuine.
Youve been here since 07 so you’d have seen the agro people of had with none genuine parts on this engine myself included

[2MUCHGAIN]

Neo do a genuine belt kit and pump for £105 but its out of stock ,Saabtech https://www.ebay.co.uk/itm/142274230200

Good point re non genuine , dads thermostat trouble a perfect example .

[2MUCHGAIN]

If its the wp I think the cam belt will be changed along with blanking the swirl flaps .
However ,I can only find these part numbers on the inlet -

46823849

3.65704.02

Which manifold is this ,early or late ?

[2MUCHGAIN]

A lot of searching returns this ,http://vi.vipr.ebaydesc.com/ws/eBayI...10&category=33

Looks like a 15mm blank kit is needed .

[2MUCHGAIN]

Well . it was indeed the water pump that had failed . I was very surprised to find it had seized ,I had thought the impeller was at fault .How the belt survived a couple of hundred miles of 3 mile trips I`ll never know , no burning smell or squealing .
Genuine GM pump fitted .Decided to replace the belt kit with the same brand that survived pump seizure , INA .

[AL21784]

A lot of searching returns this ,http://vi.vipr.ebaydesc.com/ws/eBayI...10&category=33

Looks like a 15mm blank kit is needed .

There's a guy, James from Leeds that will supply and fit a welded manifold for about £160.

I personally wouldn't trust the glue in plugs.

https://www.facebook.com/ajmotorsvauxhall/


Alan