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Will a D5 engine run without a tensioner?Views : 602 Replies : 5Users Viewing This Thread : |
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Jun 20th, 2022, 17:15 | #1 |
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Will a D5 engine run without a tensioner?
The tensioner on my S80 D5 snapped off the engine block, leaving part of the bolt in the engine and taking a bit off the block as well.
After being told by numerous garages that its not repairable and a new engine is required, a local engineer has found a belt that fits the rest of the system missing out the tensioner. The engine and car are running. Will they keep running and apart from the belt snapping are there any other dangers involved in running the engine without a tensioner? |
Jun 20th, 2022, 18:23 | #2 |
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I imagine the belt will stretch in use and without the tensioner there to take up the slack you'd run the risk of the belt skipping teeth on the pulleys or coming off them altogether.Personally it's not something I'd risk.The bit of the block that's broken off has it compromised the block i.e. breached a water or oil gallery? if not might it be possible to drill out the broken bolt[even if it means lowering the subframe/engine to get clearance to get a drill at it?
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Jun 20th, 2022, 18:33 | #3 |
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No damage to the engine itself, but even if the remainder of the bolt is taken out there is not a flat surface to put the new tensioner onto due to the missing chunk.
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Jun 20th, 2022, 19:43 | #5 |
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Surely 'Chemical Metal' would fettle that? It can be drilled, ground & sanded, filed etc. The secret to getting a good bond is of course to make sure the substrate is spotlessly clean & oil/grease free. As stated earlier above, the snapped bolt can be removed so no reason you would need a 'new' engine & tbh, there is no way I would run the motor without a tensioner! If it was safely 'doable' then the manufacturer would not have fitted one in the first place?
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Jun 20th, 2022, 23:16 | #6 |
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There's a number of ways that can be repaired... I would get the old bolt out, put a new long bolt in and then build up the metal with aluminium wire in a MIG welder. Then remove the bolt (the ali weld won't stick to it), re-tap the hole and grind/sand it flat again.
Time consuming, requires skill and special kit but much cheaper than a new engine....
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