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Originally Posted by Mat
Apparently not!
RMS for one (they did mine) told me its impossible to do a timing belt without removing the belt but then about 20K kms later one of my cam or crank seals started leaking (out of the 5, 3 were genuine items, 2 werent).
Jim Hall easily fixed them without removing anything and reckons you dont need to drop the coolant etc when changing timing belt!
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To change the crank and cam seals you have to remove the timing belt and **Undo the bolts that hold the cam pulleys to the camshafts** which requires a special socket or a really short rattle gun. Radiator must be removed for this job. doing any timing belt work on a impreza is too risky with the radiator in. Too much chance of something hitting the radaitor. Outback/liberty is abit better but still we always remove the radiator.
Also i wouldnt drive with the radiator cap half off. only drive with it on correctly. If there is a major leak you will know about it pretty soon. If you want to reduce cooling system pressure drive with your ac on.