Question about 1989 Saab 9000

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My 1989 SAAB 9000 Oil pressure light came on just before I got home. Read that I should not drive with light on I started it a few days later and the light was off. How do I clean the engine?

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1 - make sure there is enough oil in the engine to start with - you may just have low oil. 2 - the oil pressure switch could be faulty - any garage will test the switch for you for a small fee, best to know this before embarking on any repairs or remedies.

3- if you found that both of the above are ok then to clean the engineyou can use a proprietary engine flush such as wynns engine flush,
http://www.wilcodirect.co.uk/index.php?main_page=product_info&cPath=90_126_249&products_id=1107
your local motor shop should have a few different types of engine flush. these here are what I would use as have always had good results. "Gunk" is another good buy but a little more expensive. The "flush" is poured in the engine same as oil and mixes with the oil, you run the engine for 5-20 minutes (as per instructions on the tin) at normal temperature and the oil and flush go round the system dissolving all manner of grime and varnish, burnt oil etc, you then drain the engine oil ,let the engine drip with the sump plug out for a good 20 minutes at least to get as much of the oil oil out as possible - if you disconnect the ignition coil (to prevent the engine starting) you can then crank the engine for a few seconds to empty the oil pump of any residual flush and oil. Now remove the old oil filter and fit the new one (take the rubber seal out of the new filter and wet it with fresh engine oil, then put the seal back into the groove on the filer and fit the filter to the engine) then refit the sump plug (with a new washer - auto shop £1 ) , fit the new oil filter and add new oil to the engine upto the FULL mark on the dipstick - start and run the engine - hopefully your low oil pressure condition is gone. If not youre looking at a worn oil pump or a generally worn engine - Low oil pressure in a high mileage engine is nothing to really worry about, but ZERO oil pressure is terminal
Oil for your car is 10w/40 -[part or fully synthetic (fully synthetic is better but more expensive)
The oil pressure switch (if faulty) can be obtained from most auto parts shops and maybe available from saab dealers parts desk (which is best option because you are sure to get the proper official part and not a cheap copy)

Posted on Jan 23, 2010

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Posted on Jan 02, 2017

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