When to change head gaskets on a Saab 9000?
Head gaskets on all motors need changing at 100,000miles so before you start upping the boost this should be your first job and while your at it you may as well change the timing chain. Oil should be changed every 6,000 miles and use a good quality synthetic 5W-30 oil.
How do you remove the cap from a cam chain tensioner?
Remove the tensioner’s cap by first loosening the small 8mm lockbolt on the side of the tensioner body then removing the 12mm bolt on the end of the tensioner body. Be aware that there are some small parts as shown in the next photo.
When to tune a 1991 Saab 9000 engine?
Tuning the engine up to 1991 year is easy but make sure the car has an intercooler and Performance Control Valve. If it hasn’t get down the scrap yard and find some, Saab have left all the required connections for the intercooler and PCV so fitting is a doddle.
How many gear ratios does a Saab 9000 have?
In 1993 the gearbox bell housing was changed to a GM pattern, this means gearboxes before 1993 cannot be swapped for gearboxes after 1993. Saab 9000s came with 3 gear ratios, for the ultimate short gear ratio solution is to use the non turbo box other wise the Low Pressure Turbo box or the Aero box will be fine.
How does a timing chain tensioner work on a Saab?
The tensioner takes up the slack as the timing chain and plastic chain guides wear. A spring pushes the tensioner against one of the chain guides inside the timing cover. A ratchet allows the tensioner to extend about 1 mm at a time until it reaches its limit.
What’s the maximum extension on a Saab timing cover?
Maximum extension on a normal older engine is probably between 11-15 mm. Mine was extended to the limit, which explained the chain noise from the timing cover.
Why does my Saab timing chain rattle at idle?
A ratchet allows the tensioner to extend about 1 mm at a time until it reaches its limit. An indication of a loose timing chain is a rattling noise, especially before the engine has warmed up. The noise will be recognizable as chain rattle at idle with the hood open and may be loud enough to hear inside the cabin while driving.
Remove the tensioner’s cap by first loosening the small 8mm lockbolt on the side of the tensioner body then removing the 12mm bolt on the end of the tensioner body. Be aware that there are some small parts as shown in the next photo.