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Old 04-05-2019   #31
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Re: Oil catch tank.

I don't understand the vented versions.
The toxic vapor coming from the engine should go back in the intake again and get burned again, now you vent it to atmosphere and the toxic vapor build-up under the hood.
It should be a close system.
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Old 04-05-2019   #32
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Re: Oil catch tank.

Hi.
I'm not so sure about it being toxic. For many years crankcases were vented to the air, the amount of fumes is very small in comparison to what comes out of the tailpipe, and if the fumes pass through combustion who actually knows if they are still there or not. I'll be leaving the filter on my catch tank I don't have an issue at all. It will be interesting to see how the cross performs once it's been in for a month or two.
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Old 04-05-2019   #33
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Re: Oil catch tank.

This model of catch tank has the option of with filter or without, a neat aluminium sealing cap is supplied. In terms of fitting I needed to fit with the filter on top, however I may replace this with the closed sealing ring in place eventually it depends which performs best. I expected to run the car without the filter but will see how it goes, there is a pretty neat filter baffle in the tank itself and a mini dipstick although I would expect it would take forever to fill even part way.
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Old 04-05-2019   #34
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Re: Oil catch tank.

Quote Originally Posted by murphyv310 View Post
Hi.
I'm not so sure about it being toxic. For many years crankcases were vented to the air, the amount of fumes is very small in comparison to what comes out of the tailpipe, and if the fumes pass through combustion who actually knows if they are still there or not. I'll be leaving the filter on my catch tank I don't have an issue at all. It will be interesting to see how the cross performs once it's been in for a month or two.
As you say crankcase ventilation on the old cars was simply a pipe poking out the bottom of the engine. I did this with my old 1.9 tdi to try to slow down carbon fouling of the inlet manifold and it was never mentioned by the MOT tester. However now a days everything is balanced on such a knife edge I wouldn't be surprised if venting it to atmosphere would affect the running of the engine.

I'm hoping that, especially with the direct injected engine on the Ibiza, fitting a catch can will reduce and slow down the inlet carbon fouling. I fear though that it is inevitable.
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Old 21-05-2019   #35
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Re: Oil catch tank.

The M10 fine thread 1.25 nuts finally arrived from China via Amazon ! so finally fitted the bracket and oil catch tank system. Quick run out and it feels like the handbrake has been released ! much improved throttle response and pull. Itís fitted with the vented tank at present so will give it a while then remove the open filter and fit the aluminium sealing cap and see how it goes then. Pleased with the fit and many thanks to those on this thread and others who have helped.
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Old 21-05-2019   #36
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Re: Oil catch tank.

Brilliant result and a really neat job.

The City Cross is flying second and third have a very good lift. I've also fitted Denso VXU22's platinum tough plugs again a noticeable improvement. Will see how the MPG goes but I'm using the "loud" pedal right now.
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Old 21-05-2019   #37
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Re: Oil catch tank.

Thanks for your help, much appreciated.
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Old 02-08-2019   #38
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Re: Oil catch tank.

A brief update on the fitting of the oil catch tank to my Panda 1.2 easy back in May. For the first month I ran the car with the vented system and the cars performance was greatly improved, on the mpg side but just going of the cars average mpg calculation this rose from 51mpg to 55mpg. The only down side was a slight aroma of fumes at idle sometimes. I have since removed the filter type top and fitted the sealed aluminium plug. I have been running with this for a month and this is the option I will stay with, all the benefits of the open system but without the occasional whiff of fumes. MPG remains the same and performance still excellent , judging by the oil , mayonnaise and water vapour the catch tank collects im not surprised. A very worthwhile modification in my opinion, iridium plugs next.
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