06-24-2016, 03:23 PM
Side note on Seafoam:
There's been a lively discussion about GDI engines and catch cans on the twins forums. An engineer that works at a consulting firm for a number of the major manufacturers, who literally tears down coked up DI motors all day long and designs systems that address it, said that you should never do a chemical upper intake cleaning of a DI motor. It causes the deposits to break up only partially and the fragments score the crap out of your pistons and cylinder walls, possibly bend your valves and 100% lead to engine damage. Here's what this actually looks like after one of these dealership-administered cleanings:
![[Image: valve%20bent%20by%20coking_zpslokaym2f.jpg]](http://i1083.photobucket.com/albums/j392/tech17/valve%20bent%20by%20coking_zpslokaym2f.jpg)
I have never done an upper intake "sip" method of Seafoam only poured it in my gas tank to keep the injectors clean but I will definitely not be doing this now, ever.
And I know your truck's engine was probably before DI's time but I dunno if you could have the same issues doing this on non-DI vehicles
There's been a lively discussion about GDI engines and catch cans on the twins forums. An engineer that works at a consulting firm for a number of the major manufacturers, who literally tears down coked up DI motors all day long and designs systems that address it, said that you should never do a chemical upper intake cleaning of a DI motor. It causes the deposits to break up only partially and the fragments score the crap out of your pistons and cylinder walls, possibly bend your valves and 100% lead to engine damage. Here's what this actually looks like after one of these dealership-administered cleanings:
I have never done an upper intake "sip" method of Seafoam only poured it in my gas tank to keep the injectors clean but I will definitely not be doing this now, ever.
And I know your truck's engine was probably before DI's time but I dunno if you could have the same issues doing this on non-DI vehicles
Posting in the banalist of threads since 2004
2017 Mazda CX-5 GT AWD Premium
Past: 2016 GMC Canyon All Terrain Crew Cab / 2010 Jaguar XFR / 2012 Acura RDX AWD Tech / 2008 Cadillac CTS / 2007 Acura TL-S / 1966 5.0 HO Mustang Coupe
2001 Lexus IS300 / 2004 2.8L big turbo WRX STI / 2004 Subaru WRX / A couple of old trucks
2017 Mazda CX-5 GT AWD Premium
Past: 2016 GMC Canyon All Terrain Crew Cab / 2010 Jaguar XFR / 2012 Acura RDX AWD Tech / 2008 Cadillac CTS / 2007 Acura TL-S / 1966 5.0 HO Mustang Coupe
2001 Lexus IS300 / 2004 2.8L big turbo WRX STI / 2004 Subaru WRX / A couple of old trucks