Plausible theory on Mk3 RS engine failures
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Author Topic: Plausible theory on Mk3 RS engine failures  (Read 253 times)
mondo
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« on: January 10, 2018, 06:41:12 PM »

Found this while surfing the net.  Thought others might find it interesting?

https://jalopnik.com/did-ford-install-the-wrong-head-gaskets-on-the-focus-rs-1821665968
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« Reply #1 on: January 11, 2018, 07:37:29 AM »

Interesting. I would of thought if this is the case they should be able to put a recall out to all the cars with this part used.

It also means at some stage Ford became aware that the wrong gaskets were being used and they switched to the right ones. This would show negligence on Fords behalf that once realised they did not actively do something about fixing it. Saying to contact us if you notice white smoke or other issues isn't good enough.
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buzz819
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« Reply #2 on: January 11, 2018, 11:25:29 AM »

I reckon, they have no idea what cars have the wrong gaskets in them. It could be the wrong parts bin was dropped, or the wrong shift used the wrong bin, or it could be a whole production of cars.

If they recall ALL the cars and there is only 1% of them that have the problem, that is going to be a lot of people without cars and Ford pulling apart engines without a reason.

Just my thoughts
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Robbo
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« Reply #3 on: January 11, 2018, 11:47:14 AM »

I think the main issue is the open deck design is not rigid enough long term.
Same as the 5 pot, open deck leads to liner or head gasket issues in time as the bores move a bit and slowly break down the gasket.
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« Reply #4 on: January 11, 2018, 11:58:19 AM »

The gasket theory sounds good for the short term failures happening but open decks just aren't stiff enough and rely on the gasket holding the bore still. There will always be a long term issue.
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« Reply #5 on: January 11, 2018, 12:33:46 PM »

I think Ford has noticed that but as Buzz said, they have no idea how it happened n what car range is effected.

Re that movement, wouldnt it be easy to preven by using like dowel pins or so. To act like a deck plate, then there is no movement. The design just necessites to calculate thermal expansion, as it can be non uniform n lead to wear n tear plus overheating at a particular bore area.
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« Reply #6 on: January 12, 2018, 06:59:02 PM »

I would have thought they need to keep track of all parts used to build a car for recall reasons.

We have a Hyundai Sante Fe and received a letter that we need to have our bonnet safety catch replaced due to an issue. Have read of other safety recalls so assumed there has to be some sort of parts inventory/database otherwise as you said, car companies would need to recall all cars when problems (particularly safety problems) are identified.
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