Date: Mon, 23 Jan 2006 11:43:46 -0000 From: "Pidgeonpost" <Pidgeonpostnospambrain.com> Subject: Re: Classic 900 Turbo problem
"SuperGlide" <tussucknospam.com.au> wrote in message news:43d36e43$0$84154$c30e37c6nospamreader.news.telstra.net... > "Pidgeonpost" <Pidgeonpostnospambrain.com> wrote in message > news:dqvo36$45h$1nospamg1.svr.pol.co.uk... >> >> "Craig's Saab C900 Site" <c900nospam.apana.org.au> wrote in message >> news:dqvmnl$lqc$1nospam.apana.org.au... >> > "SuperGlide" <tussucknospam.com.au> writes: >> > >> >>Hello again...well the mighty Saab is acting up again....This time she >> >>picked the hottest day of the year to it with the temp pushing 45 >> >>degree >> >>outside....So here are the symptoms etc: >> > >> >>Not sure if this is related but...I missed a gear changing down (2nd >> >>instead >> >>of 4th) so the engine had a bit of a hard time revving etc, I recon the >> >>fuel >> >>cut-off may have even kicked in..and some time after the problems all >> >>started. >> > >> >>1. When cold she runs fine >> >>2. When hot she misses a lot and sometimes struggles to pick up revs > etc. >> >>She is drivable, but only just enough to crawl home. >> > >> > Perhaps there is a blockage in the fuel supply system? I've still got >> > to >> > investigate that aspect with the 8V turbo car I'm repairing. >> > >> >>3. When I stop the car, the engine is very hot... >> >>4. There is water (green antifreeze stuff) in the water reservoir. >> >>5. I can unscrew the top off the reservoir with no problems...i.e. > there >> >>is >> >>NO pressure. >> >>6. If I squeeze the top radiator hose I can see the fluid level in the >> >>reservoir rise. >> >>7. Odd but the Radiator hoses do NOT appear to be under any pressure >> >>at >> >>all. >> > >> > Is the car losing coolant at all? Have you checked the thermostat and > it's >> > housing? Do all the coolant hoses (to/from heater valve, large and >> > small >> > hose to coolant tank, etc. get hot to indicate there is flow through >> > all paths in the coolant system? >> > >> > Regards, >> > >> > Craig. >> > -- >> > Craig's Saab C900 Page at | Craig's Classic Saab Workshop - Sydney >> > .au >> > http://lios.apana.org.au/~c900 | http://www.classicsaab.net and other >> > URL's >> > Email: c900nospam.apana.org.au | For Saab 99/C900/9000 Enthusiasts >> > World-Wide! >> > Alternate: saabonautnospaml.com | Web-forums, galleries, library, links, >> > etc. >> >> >> ....regarding the fuel problem, could it be fuel starvation as Craig >> suggests aggravated by the high ambient temperature? >> As for overheating, what does the temperature gauge read? If it's high it >> may be worth removing the thermostat temporarily or replacing it. Other > than >> that it's down to the business of eliminating one thing at a time I >> guess....slow and painful..>! >> >> > > I should add that I can smell petrol for a while when it first starts > acting > up - sorry forgot about that earlier. I recon the ambient temp could be > messing up the fuel delivery system somehow....But it could be unrelated > to > the overheating. > > The temp problem is really weird. The temp gauge in the dashboard says > the > temp is normal...i.e. its not reading anything higher than I have ever > seen > it display. > > There was no liquid on the ground when I stopped to let the engine cool > down > and there does not appear to be any leaks...But I have yet to go over it > with a fine tooth comb. > > Reading the Bentley I recon that it could be a stuft thermostat not > switching the coolant flow properly once the engine heats up....Why do I > think this...well the radiator hoses were hot BUT not boiling hot (i.e. > hot > due to the engine heat). And when I took the cap of the reservoir I was > able to dip my finger in the fluid ad while it was warm, it certainly was > NOT boiling. Its almost as if the main cooling paths are not being used. > AND the heater worked very well!!!!!!!....I tried cooling things by > turning > the heater onto full and boy was the air coming from the vents HOT...I > could > have burnt my hand if I had held it there too long. > > Graeme > > > ....yes, maybe the 'stat is on the way out. May also be worth swapping the cap from the coolant top-up tank if there's no pressure in the system. Can't remember my science, but doesn't pressurising the system affect the temperature in some way? Both the stat and cap are easy swaps before you get into any open heart surgery though...
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