Horrible Compression Test after TimBelt Change
#1
Horrible Compression Test after TimBelt Change
2002 B5 S4
I just changed the timing belt using the cam lock tool. Didnt use the crank lock tool but I was 99.9% positive that tick didnt move.
I decided to run a compression test after I put the front support and radiator back in and I got everything from a 45 to a 170. Other weird thing was that the engine sounded half dead while I was cranking it. It sounded as if the starter was turning half speed.
I know it doesnt have an effect but half the sensors werent connected and I pulled the fuel pump fuse.
I didnt run a compression test b4 I changed the timing belt but I ran a 13.3 at the track solely with an APR tune. So there is no way it could have been off before..
They only culprit I see are the cams being off but I worked very meticulously when I changed the belt... I made reference marks on the cam sprockets as well as using the cam lock tool.
If the cams are off can someone tell me how to align them to TDC again... I know I have to take the valve covers off and there are some markings... but thats the extent of my knowledge..
Thanks again... this is buggin the hell out of me.. its like having a sick child with no diagnosis...
I just changed the timing belt using the cam lock tool. Didnt use the crank lock tool but I was 99.9% positive that tick didnt move.
I decided to run a compression test after I put the front support and radiator back in and I got everything from a 45 to a 170. Other weird thing was that the engine sounded half dead while I was cranking it. It sounded as if the starter was turning half speed.
I know it doesnt have an effect but half the sensors werent connected and I pulled the fuel pump fuse.
I didnt run a compression test b4 I changed the timing belt but I ran a 13.3 at the track solely with an APR tune. So there is no way it could have been off before..
They only culprit I see are the cams being off but I worked very meticulously when I changed the belt... I made reference marks on the cam sprockets as well as using the cam lock tool.
If the cams are off can someone tell me how to align them to TDC again... I know I have to take the valve covers off and there are some markings... but thats the extent of my knowledge..
Thanks again... this is buggin the hell out of me.. its like having a sick child with no diagnosis...
#2
I pretty sure your valve timing to crank is off. Make sure the crank tick lines up with the mark on the crank cover and that the cams are also inline. If you didn't remove the cams, the cams wont be miss aligned. Lete me know about the crank alignment.
#4
I just did my t-belt on my 2000 and I did use the tool and I think without it it would be a pain in the *** to get it just right so on that note and what you are saying it sounds like one or both of the cams are off of alignment
#7
you did loosen the cam cogs as you are instructed too ? it is necessary to properly pretension the belt, if you dont you could have jumped teeth, i found this out the hard way. i bought my car used, and the tbelt maint was performed 10000 miles prior to my purchase. well i put 10000 miles on it and was at the track and it jumped two teeth. remember, two teeth is all the allowance you get as far as jumping teeth go.. jump three teeth and youll def need some head work. you can do the tbelt with out loosening the cam cogs and it all looks good.. but it is far from good, right or proper.
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