[dave968]

Some ? re maintenance?

My apologies for those who read this post on Rennlist, not all my questions were answered.

On a track only 968, presently only DEs, maybe racing in the future:

-What interval would you retension the timing/balance shaft belts? and when would you replace the belts/rollers/tensioners?

-My dealer quoted me $1350 labor&parts to replace the timing/balance shaft belts/rollers/tensioners, is this reasonable, what do most private garages charge?

-If the front engine seals are not leaking, would you replace them when the timing/balance shaft belts are replaced or only when they are leaking? How much labor would this add to a belt service?

-Besides the front engine seals and the oil pan seals, are there other places where the 968 engines leaks oil?

-What is the estimate to have the variocam pads and chain inspected? And if they need to be replaced?

txs

--Dave

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[flash]

just to be clear, this is for a car that is regularly tracked - this means at LEAST once a month, every month - for a race car, this is even more critical



check tension every event - takes 10-15 minutes



replace belts and rollers twice as often as for street



1350 is a tad high, but not too far off - i would learn to do it yourself, or make a deal with the shop



unless they are leaking, i would not attack the front seals until you are just about ready to do a valve job - no, the two are not directly related, but the age of them, related to need of service, seems to coincide



notorious for filter housing leaks - occasionally rear main leaks



inspect variocam at 40k if you are tracking, and every 20k thereafter - replace as necessary



for a race car, fully inspect EVERYTHING at least every 6 hrs of track time (time actually on the track, not standing around in the paddock) - basically every other event



personally, i inspect everything but variocam on the car before every event, including fun runs

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[vnarma]

I would concur with Flash. I do a post event checkout after every event. Most of my events are two/three day events. Fresh fluid, brake bleed! Check wheel bearings, fuel lines, brake lines, pads, belts. Give the car a thorough checkout. I do it after the event to give me as much time to correct before the next event.

I followed the same procedure for years with my 924S, and it work well. Did find a few issues post event and had enough time to correct. I do between 10-15 track days, and about 20 autocross days per season.

Fresh fluids are key to keeping them running well. Good way to stay away from the number 2 bearing problem.

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[flash]

lol - if i weren't such a lazy sot, i would do it right after the event too - that is the best way for sure - when i had my shop, that's how we did it - it came off the trailer and my guys tossed it up on the rack - then i just came over and checked it out, and let them deal with it from there



now that i don't currently have a lift, i drag my butt on getting to it - i'm just about to resolve that though - a good thing too, because there is no way i am going to build and maintain a race car on jackstands

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[S_Cal968]

As mentioned in the other oil leak thread; check the cover caps on the aft end of the balance shaft housing. These caps are a common source of leakage.

Since it's quite a task to R&R the cap seals, some just use RTV to seal the leak. However since this is a track car I'd go the extra mile and change the seals.

I should add I RTV'd mine a couple of years ago and my engine hasn't dripped a drop since...

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