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Dec 28th, 2019
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Re: Intake Manifold Removal
[Re: DaveW]
#735159
06/03/22 11:18 AM
06/03/22 11:18 AM
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Joined: Jul 2007
Posts: 22,281
Suffolk
John V6
Brooklands Register contact
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Brooklands Register contact
Member of the Inner Circle
Joined: Jul 2007
Posts: 22,281
Suffolk
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No the issue is as there is no fuel in the air going through the valves the petrol being directly injected into the cylinder like a diesel. This means crankcase gases with oil flow over the valves but unlike in a standard petrol engine they aren't was off by the fuel in the fuel air mixture. Hence the concern.
JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
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Re: Intake Manifold Removal
[Re: RJW]
#735184
06/03/22 01:27 PM
06/03/22 01:27 PM
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Joined: Jun 2015
Posts: 1,106
North Somerset, UK
Deejay
Has a lot to Say!
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Has a lot to Say!
Joined: Jun 2015
Posts: 1,106
North Somerset, UK
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Am I correct in thinking that muck on valves is less of an issue on the Duratec engine?
Bob. To answer the question more directly...yes, it is less of an issue on a Duratech. For the reasons John stated above, though a slight typo...he meant to say the backs of the valves aren’t “washed” by the petrol/air mixture as it flows past into the cylinder.
Doug
2011 +4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Re: Intake Manifold Removal
[Re: DaveW]
#735190
06/03/22 02:56 PM
06/03/22 02:56 PM
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Joined: Jul 2007
Posts: 22,281
Suffolk
John V6
Brooklands Register contact
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Brooklands Register contact
Member of the Inner Circle
Joined: Jul 2007
Posts: 22,281
Suffolk
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Correct I meant the back of the valves on a GDI. Sorry for the confusion.
JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
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Re: Intake Manifold Removal
[Re: Robert MB]
#736343
17/03/22 02:14 PM
17/03/22 02:14 PM
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Joined: Dec 2010
Posts: 116
Hamburg, Germany
Robert MB
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2010
Posts: 116
Hamburg, Germany
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But Dave, the environment  Catch can is now installed as well, I'll check after a few hundred kms and let y'all know! Well, after only ~200km, there was a good shot of oil/water/exhaustgases in the catch can, clearly it does catch a lot of stuff. But the YouTuber "Humble Mechanic" had those sent in to a specialist who analysed the liquid, and it was to a very high degree just water. So, I am considering venting to atmosphere through a breather as well now...
Robert MB
2010 4/4 Sport / 2013 Threewheeler / 2009 +4 / 2018 +4
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