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Showing results for tags 'camshaft position deviation'.
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Hello all, New to P-Cars but not to engine rebuilds. Have done my share of SMB 350 rebuilds so not shy about what it takes. That being said, I just took ownership of a 2000 911 3.4L 996 with 99.5K miles. They had all service records demonstrating responsible care and appropriate service intervals. Like all cars, I like to do my due diligence to "reset the clock" (change oils, fluid, etc). I've read across many posts and all very informative, especially JFP! The first thing I did was put this on a Durametric and getting some data. Let me first say that I put it on the scanner because the car got a CEL after some vigorous driving and stopped at a light. The codes were P1128 and P1130. Thanks to this forum, I've already run some diagnostics and tests and they seem to point to the MAF. Some slight rough idle when codes were cleared and some slight surging. This corresponded with symptoms and readings. Now, as recommended here to check for possible IMS bearing issues I ran a diagnostic for the Camshaft position deviation 1 and 2 (NO Fault codes for this condition). After a brief 30 min vigorous drive up and down a main street, the readings at idle were: Camshaft position deviation 1 : - 10.02 Camshaft 2 : - 2.55 Angle for camshaft bank 1: 0.17 Angle for camshaft bank 1: 0.19 They held there rock steady throughout the drive with slight variation from cold start. According to this forum, this seems to be an indication of a possible chain tensioner pad replacement due. If this is the case, what else should I consider as "wear and tear" replacements and is this a DIY situation? Would I need adjust timing, special tools (besides camshaft tool), etc? Does anybody have a how to guide or is this available in the Factory Service Manual? If this is too complicated a task, what can I expect a small specialized shop to do this for? Also figure it might be a good time to do IMS... Many thanks in advance to all of you. Txs.