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thom4782 · 11-01-2018, 05:22 AM

Several questions b/c my 986 with 165K miles had black particles in the sump. Cam deviatons are -3 and -5, with the latter having increased -2 over the past 40K miles.

1) do all the tensioner rails tend to wear evenly?

2) if not, which ones wear the most - crankshaft to cam or IMS?

3) Can one inspect the tensioners, especially the IMS tensioner, pads w/o having to split the engine case?

4) If so, how does one do these inspections. What must come off to gain access

Asking b/c if I can see the IMS tensioner has a lot of life left in it, then the cost to repair may be worth keeping the car

Thanks

11-01-2018, 05:22 AM	#10
thom4782 Registered User Join Date: Sep 2010 Location: Foster City CA Posts: 1,099	Several questions b/c my 986 with 165K miles had black particles in the sump. Cam deviatons are -3 and -5, with the latter having increased -2 over the past 40K miles. 1) do all the tensioner rails tend to wear evenly? 2) if not, which ones wear the most - crankshaft to cam or IMS? 3) Can one inspect the tensioners, especially the IMS tensioner, pads w/o having to split the engine case? 4) If so, how does one do these inspections. What must come off to gain access Asking b/c if I can see the IMS tensioner has a lot of life left in it, then the cost to repair may be worth keeping the car Thanks __________________ '87 951 '01S 986 (Sold after 16 years ownership) '78 924 (carburated; sold when moving to CA)