If you want Thor to last a long time, use a synthetic A3/B3 oil, flush the trans every 30K, flush the brake fluid every 2 years, change your filters on schedule and address small problems before they become big ones.
If you have not done the rear shocks and the front struts, do them, you'll see a big difference. While you do the front struts, replace the front control arm bushings and upper strut mounts. I would replace the balljoints at this age while you've got the control arms out, regardless of how they look...
If you haven't done the engine mounts, they're likely shot. My XC's mounts were cracked at 120K...the T5's were done at 105K...there are 5: front (by the intake piping), rear (by the angle gear), passenger side (by the crank pulley), upper and the trans torque mount. Upper and torque mount are easy to change. The others are more involved.
The TCV is a replacement part...if the old one is good, you won't see a performance increase...but at this age, who knows? The silicone hoses are also a replacement part...they're better than the OE rubber, but the OE rubber on my XC is still good...
If you want more grunt from the engine, do the IPD softloader - it raises the boost pressure limit - no difference to the engine during normal running, unless you get on the gas, in which case, it will run at higher boost pressure. There are no other big gains to be had. A performance exhaust will add a few HP, intake is debatable...but boost will make a big difference.
Last edited by Astro14; 02-25-2012 at 06:40 AM.
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