Blow by

stevehazelwood · Sep 11, 2017

I have a 2014 2500 ram 6.7 Cummins has 55000 mile and dealer said the leak I took it in for was blow by it seems a little early for blw by

Sent from my XT1254 using Tapatalk

Ratket · Sep 11, 2017

It's seems way early for blow by.
You have any mods done?
Are the 6.7 turbos oil fed?
Maybe they will warranty it and u get a new motor? Or a new head?

yoda · Sep 11, 2017

What are they saying is the cause of the blow by. If an injector failed and scored a cylinder , it should be covered under warranty, If you have an aftermarket intake setup and the turbo shows signs of being dusted, evidence of dirt in air intake system, you may be screwed

stevehazelwood · Sep 11, 2017

Ratket said:
It's seems way early for blow by.
You have any mods done?
Are the 6.7 turbos oil fed?
Maybe they will warranty it and u get a new motor? Or a new head?

They where not worryed about it said just blow by not sure on turbo and no mods

Sent from my XT1254 using Tapatalk

yoda · Sep 11, 2017

Then why did they mention it? They may not be worried but I would be if i were you. Some blow by is normal, depends how much, maybe get a second opinion.
Very expensive motor, if there is a problem you definitely want to find out before you are out of warranty.

stevehazelwood · Sep 11, 2017

yoda said:
Then why did they mention it? They may not be worried but I would be if i were you. Some blow by is normal, depends how much, maybe get a second opinion.
Very expensive motor, if there is a problem you definitely want to find out before you are out of warranty.

Yes I just talked to the dealer they said it is normal blow by and it's normal for them to do it but probably going to get a second opinion

Sent from my XT1254 using Tapatalk

MdMassey · Sep 11, 2017

There are a lot of things that engines do that is "normal" but not good. The early GM LT1 engines used teflon valve stem guides that tended to wear out around 15K, lots of heads were replaced in the mid 90's for something that was "normal". In your case it appears that your crankcase ventilation is not adequate and that's causing the issue. Again this could be "normal" but not good. I don't know off hand what your engine uses for ventilation but I would look into it to make sure it's working properly.

Oh and all engines create blow by... there is nothing that you can do to prevent it unless you can make a piston ring without a gap, and totally seal the cylinder wall to ring area no matter what temp the engine is... the only option is to relieve the pressure in the crankcase and to help keep the oil from getting contaminated its good to get fresh air circulation as well.

stevehazelwood · Sep 11, 2017

MdMassey said:
There are a lot of things that engines do that is "normal" but not good. The early GM LT1 engines used teflon valve stem guides that tended to wear out around 15K, lots of heads were replaced in the mid 90's for something that was "normal". In your case it appears that your crankcase ventilation is not adequate and that's causing the issue. Again this could be "normal" but not good. I don't know off hand what your engine uses for ventilation but I would look into it to make sure it's working properly.

Oh and all engines create blow by... there is nothing that you can do to prevent it unless you can make a piston ring without a gap, and totally seal the cylinder wall to ring area no matter what temp the engine is... the only option is to relieve the pressure in the crankcase and to help keep the oil from getting contaminated its good to get fresh air circulation as well.

Ok I'll check out the ventilation thank you

Sent from my XT1254 using Tapatalk

Blow by

stevehazelwood

Junior Member

Ratket

Senior Member

yoda

Senior Member

stevehazelwood

Junior Member

yoda

Senior Member

stevehazelwood

Junior Member

MdMassey

Member

stevehazelwood

Junior Member

Similar threads

Latest posts

Staff online

Members online

Forum statistics

Share this page