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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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Valve timing out?Views : 422 Replies : 7Users Viewing This Thread : |
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Sep 23rd, 2017, 18:38 | #1 |
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Valve timing out?
Hello,
I am trying to fix 2003, 1.6 petrol V40. It was given to me with this problem! The engines performance is down on where it should but there are no DTCs. I think the valve timing is incorrectly set, could anyone confirm that with the piston nearest the belt (No 1?) at bottom dead centre the crankshaft timing marks will be aligned. If this is the case the timing is advanced by two teeth. I look foreword to hearing from anyone that might be able to help. Best wishes, Tony |
Sep 23rd, 2017, 18:49 | #2 | |
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Sep 23rd, 2017, 18:54 | #3 | |
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With the crank set on the mark, set the camshafts to their marks on the plastic belt cover - two little nibs cut out on the web under the top cover, then thread the new belt around the crankshaft and up to the inlet cam, over the two cams and down around the waterpump and adjuster and back to the crank. Timing should be good if the original marks are still there, if not, you will need the special cam setting tool to determine where the cams need to be in relation to the crank. Edit: Clan beat me to it.
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2001 V40 2.0lt Sport Lux - Daily Driver. 178k miles. 2003 C70 2.4 GT Convertible - Garage Queen. 67k miles. http://www.neptuno6benagil.com Last edited by ITSv40; Sep 23rd, 2017 at 18:56. |
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Sep 24th, 2017, 00:00 | #4 |
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Yeah, as above. Forget about pistons and their positions. Use the bottom pulley's timing mark.
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Sep 24th, 2017, 11:54 | #5 |
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Thanks all for replying. The problem we have is the centre bolt in the lower pulley. Our tools won't shift it. Before spending more time and breaking more kit it would be good to know we aren't on a wild goose chase.
If we put the pistons accurately level in the bores by measuring down through the spark plug holes, the cam timing marks should line up? Yes? We have checked that the slot on the back of the cam lines up with the joint in the head when the sprocket marks are aligned, on the inlet. The exhaust doesn't have VVT so I doubt that it has been disturbed, and its sprocket aligns when the inlet does. Again any info much appreciated, I'm Rory by the way, giving Tony (Hermees) a hand. |
Sep 24th, 2017, 12:09 | #6 | |
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Sep 24th, 2017, 16:33 | #7 |
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Many thanks Clan, the car now runs as it should. We were following 'the' manual re removing the pulley. Obviously not a good idear.
The timing was three teath out, no wonder it wasn't performing! The clue incase anyone else comes on this thread was that the VVT solenoid was working and had a signal, a 12V square wave with 15% duty cycle, but this never changed. The ECU had worked out there was a timing problem and disabled the VVT. Why we did not get a code I know not; but the car runs - hurray. Thanks again to all. Hermees. |
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