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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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cambelt jumped a tooth.Views : 26453 Replies : 286Users Viewing This Thread : |
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Feb 18th, 2010, 17:25 | #11 |
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as it is still in running order i am assuming there is no mechanical noise can you not take plugs out and test compressions on each cylinder if you haven't got a compression tester you could get a rough idea by covering each plug hole in turn if you know what i mean
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Feb 18th, 2010, 20:43 | #12 | |
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the dam thing sounds like its only running on 4 at the mo. getting sick of the dam thing now lol.
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Feb 18th, 2010, 21:41 | #13 |
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Don't know what (com) should be But they seem ok pretty near each other So i would i think look somewhere else Plugs leads not familiar with setup i mean coil or coil packs I'm not saying it hasn't jumped a tooth but with (com) pressures that you have i would not think it has. Fuel side or electrics my moneys on let us know how you get on hope you get it sorted
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Feb 20th, 2010, 09:26 | #14 |
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hi all, so if i am one tooth out is it poss just to take the tention off the belt etc and turn it back into place and re tention?????
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Feb 20th, 2010, 12:16 | #15 | |
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might be worth getting the codes read,might give an indication if its a faulty sensor ie air flow sensor/coolant sensor etc.
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Feb 20th, 2010, 17:21 | #16 | |
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Feb 20th, 2010, 17:45 | #17 | |
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Also a timing belt rarely ever jumps and if it does it will remove other teeth off the belt in the process and 99 times out of 100 it will cause valve to piston contact hope this helps laurence |
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Feb 20th, 2010, 18:03 | #18 |
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Caution here mate, just because the cam pulley marks are out dose not mean the timing is incorrect. When we replace timing belts we use the rear cam locking tool to time the cams correctly and lock the crank with a dedicated pin.
The cam pully is attached to the cams by 3 bolts, the puley holes are elongated which alows the cam puleys to move. This is so during setting the tensioner the load is distributed on the full run of the belt. To confirm cam and crank correct sequensing an oscilloscope is used to vew cam and crank corilation. Also your compressions do not indicate incorrect valve timing. A vaccume guage should show around 22 hg at idle confirming correct valve timing. |
Feb 20th, 2010, 21:28 | #19 |
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ok thanks very much for your info.
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Feb 20th, 2010, 21:36 | #20 | |
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