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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old January 17th, 2018, 15:16   #1
Automann
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Default SeaFoam

Has anyone used Seafoam in the crankcase/fuel? With what results please.

I have a hard start problem, cranks very well but won't start right off. When it does, there is alot of smoke from the tailpipe! A LOT... help?
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Old January 17th, 2018, 16:35   #2
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Use the advanced search, click on "search title only". There are several threads there, too many to copy and paste here.
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Old January 18th, 2018, 08:41   #3
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You mention hard starting, did you already use Sea Foam? Generally speaking don't use Sea Foam in a TDI, in the crankcase as that can cause a runaway engine, and it is not the greatest injector cleaner either.
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Old January 21st, 2018, 07:04   #4
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Have you checked the injection timing?? When it's not advanced enough it causes longer cranking times. Of course there are lots of other factors that may need to be addressed, but it takes some digging to find the causes.
I doubt SeaFoam added to the oil will do any good for that issue.
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Old January 21st, 2018, 08:57   #5
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Quote:
Originally Posted by Nevada_TDI View Post
You mention hard starting, did you already use Sea Foam? Generally speaking don't use Sea Foam in a TDI, in the crankcase as that can cause a runaway engine, and it is not the greatest injector cleaner either.
Where does this information originate from???

I had used Seafoam in my former 2002 Jetta without ever experiencing any problem whatsoever!
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Old January 21st, 2018, 09:08   #6
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You need nothing in your crankcase but the proper oil.

My '98 is pushing 400k miles. You couldn't tell if it has more than 10k based on what the inside of the engine looks like. In other words there are no deposits. If the wrong stuff has been used there might be deposits but switching to the right oil will probably clean them up.

What jettawreck said on your starting problem.
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Old January 21st, 2018, 10:38   #7
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Quote:
Originally Posted by KLXD View Post
You need nothing in your crankcase but the proper oil.
There is/was a big difference in my and your driving. When at home I used ULSD at 15ppm sulfur. I also drive in Mexico where the Diesel is LSD at 500+ppm sulfur. The sulfur does leave deposits in the crank case whether you like it or not.
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Old January 21st, 2018, 12:37   #8
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I'd just reduce the interval if the sulfur content of Mexican fuel truly is problematic. No way would I mess with the oil viscosity/ lubricating properties by adding something like seafoam. Most all of the miracle additives are snake oil, imo.
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Old January 21st, 2018, 13:14   #9
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I have seen more problems caused than cured by additives, maybe with the exception of Techron in gas cars.
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Old January 21st, 2018, 14:37   #10
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Quote:
Originally Posted by Jetta_Pilot View Post
There is/was a big difference in my and your driving. When at home I used ULSD at 15ppm sulfur. I also drive in Mexico where the Diesel is LSD at 500+ppm sulfur. The sulfur does leave deposits in the crank case whether you like it or not.
So what if it does? Taking older engines apart when leaded fuel was around, we found huge deposits of "gunk" and it was the lead.


Quote:
Originally Posted by Nevada_TDI View Post
and it is not the greatest injector cleaner either.
Disagree, used it every tank of WMO in my diesel van and it kept my injectors free of deposits, stopped using it and had to service them every 3-4 months.
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Old January 21st, 2018, 23:06   #11
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Quote:
Originally Posted by Jetta_Pilot View Post
There is/was a big difference in my and your driving. When at home I used ULSD at 15ppm sulfur. I also drive in Mexico where the Diesel is LSD at 500+ppm sulfur. The sulfur does leave deposits in the crank case whether you like it or not.


So why are there no deposits in my engine that ran LSD for several years?

And what does what I like have to do with it?
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