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| Burnt exhaust valves on a 91 1.0 | |
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| Tweet Topic Started: Mar 7 2013, 09:21 AM (492 Views) | |
| geodave | Mar 7 2013, 09:21 AM Post #1 |
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New Member
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What cause this and how can I prevent it in the future? |
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| crankcase | Mar 7 2013, 09:38 AM Post #2 |
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The reasons are debated, but include: Normal wear; loss of hydraulic lash adjusters action, a service issue (they loose their spring); loss of EGR system which makes the engine run hotter, also a service issue (ports get stopped up); and timing. In general, conditions that make the car run hotter. A popular treatment for the condition is to use stainless steele exhaust valves, intake valves generally do not have this problem. |
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| clarkdw | Mar 7 2013, 09:47 AM Post #3 |
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If you replace burnt valves on an oil burner it will inevitably reoccur if you do not fix the oil burning issue. In other words rebuilding the head without doing the bottom end is false economy. |
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| snowfish | Mar 7 2013, 02:29 PM Post #4 |
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Basic GearHead
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20 years of cruising at 3000+ rpms
Full rebuild, no compromise, with stainless valves.
Yep. Need to do a Full build. Then worry about it 15-20 years down the road. |
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| 1 user reading this topic (1 Guest and 0 Anonymous) | |
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Need to do a Full build.
Then worry about it 15-20 years down the road.
7:20 PM Jul 10