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displaying posts 1 to 4 of 4
| Author | Subject: Locking cam timing |
 docwra
Regular  Location: Cambridge UK Registered: 16 Jun 2009 Posts: 217 Status: Offline |
Post #1
Is there a guide to locking off the cams before removing cambelt? I have my inlet cam advanced and dont want to lose it when putting a new bottom end on  ________________________________________ Lots of Nissans, two 306 GTI-6's. They are catching up! |
 Posted 17th Nov 2011 at 11:43
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Disco_Stu
Regular  Location: County Durham Registered: 09 Aug 2008 Posts: 243 Status: Offline |
Post #2
I used this technical guide in the download sectionLink ________________________________________ Peugeot 306 Gti-6 Track car (soon to be supercharged)Project page Blog |
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Posted 17th Nov 2011 at 12:17
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #3
Before removing the timing belt pin the cams and crank pulley in their relative positions. Take off the cam covers and mark the cams against a reference point in the head with some paint (you will need to degrease the area you want to mark with a solvent beforehand though)________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 17th Nov 2011 at 22:37
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Denis
Regular  Location: Cambridge Registered: 07 Sep 2004 Posts: 493 Status: Offline |
Post #4
Standard timing marks / pin locations are obviously only for standard cam timing. Unfortunately because of the way the belt tensioning is done on this engine, to get the right tension, you have to loosen the sprockets and the cams have to be locked in standard positions.So, the procedure is as follows: - Rotate the engine until the crank pulley and exhaust cam timing marks line up and pins can be inserted - Measure/mark how much the inlet cam was advanced. - Rotate the inlet cam to line up with the timing mark - At this point all timing marks are lined up and the cams can be pinned to remove the cambelt - Do whatever needs to be done with the engine: take the head off, etc. - Refit the cambelt and tension it up - Rotate the inlet cam to the required advance As for how much to advance the inlet cam, I have not checked it myself, but the figures that I found were: standard inlet lift 0.8mm @ TDC, maximum safe lift ~1.4mm @ TDC. ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 17th Nov 2011 at 23:14
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