05 A8 4.2 BFM cam lock bar not lining up?
03-28-2016, 08:26 AM
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05 A8 4.2 BFM cam lock bar not lining up?
Hello, I've been trying to do the timing belt on the A8 and cam lock bar will not line up even though lock tool is in crankshaft, it's only off a little but just enough to not lock in. Has anyone else this issue?
03-28-2016, 08:40 AM
#2
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Yes. The play in the belt and tensioner combined w/ long belt length. Take bar with the pins pins off one side (cam) and keep it on other side and use it as a lever arm to move that cam pulley just a few degrees. Use bar itself to judge when you have it lined up by eye to the other one and set of pins+holes. Then take it off that side and do the same on the other. Just a little so you don't start to move belt. Eventually you get it to lock in at same time on both sides. Be careful with fingers in this since a free cam can spin suddenly with no warning given valve spring pressure behind it.
Also make sure you aren't 180 degrees cams/360 on crank out of phase. You probably realize, but stating it just in case--the big holes and the small holes that only fit one way..
Also make sure you aren't 180 degrees cams/360 on crank out of phase. You probably realize, but stating it just in case--the big holes and the small holes that only fit one way..
Last edited by MP4.2+6.0; 03-28-2016 at 08:44 AM.
03-28-2016, 09:23 AM
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Yes. The play in the belt and tensioner combined w/ long belt length. Take bar with the pins pins off one side (cam) and keep it on other side and use it as a lever arm to move that cam pulley just a few degrees. Use bar itself to judge when you have it lined up by eye to the other one and set of pins+holes. Then take it off that side and do the same on the other. Just a little so you don't start to move belt. Eventually you get it to lock in at same time on both sides. Be careful with fingers in this since a free cam can spin suddenly with no warning given valve spring pressure behind it.
Also make sure you aren't 180 degrees cams/360 on crank out of phase. You probably realize, but stating it just in case--the big holes and the small holes that only fit one way..
Also make sure you aren't 180 degrees cams/360 on crank out of phase. You probably realize, but stating it just in case--the big holes and the small holes that only fit one way..
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