Ripcat
Captain
Close to pulling the trigger on Walker Airseps for my Yanmar 4LH 240's. Seems like a great product and a smart upgrade but am interested in any opinions.
Hello Mike, if you are having a lot of issues with turbo charger fouling/coking than you may want to consider a better oil with a better oil additive package. There are oils out there that offer a better additive package that won't oxidize and turn into the tar like substance you speak of at high charge air temps. These oils are made for engines that use CCV systems for Tier 4 off highway engine products. Are you using a CJ-4 type oil and if so, is it semi-synthetic or mineral based only? Curious.I know this will bring a lot of negative feedback but you did ask for opinions. There is no doubt that they make for a cleaner engine room, but I'm not a fan of Airseps on any aftercooled engine. The reason I feel this way is that not all of the crankcase vapor oil is seperated out and returned to the oilpan. Some of it stays in suspension and is then introduced to the charge air. In a naturally aspirated or even just turbo'ed engine this doesn't matter. But with pleasure and light duty aftercooled engines having inlet charge air temperatures approaching 350 degrees this oil is cooked into a tar like sludge that eventually clogs the aftercooler fins. After servicing dozens of Serck R/W aftercoolers and several Modine jacket water coolers I've given up trying to clean the elements from Airsep equipped engines myself and send this portion to a shop that does commercial cooling system work. If you get the chance, take off the cross over pipe on a Airsep'd engine that has some hours on it and look inside it. Normally I stay with what the factory supplies but years ago I removed the Cummins supplied Airsep on my 370 B and replaced it with a Fleetguard AH1900 paper filter. To me, taking waste oil and putting it into a delicate cooler on a high performance engine is a bad idea.
Thanks, but I'm actually OK. No fouling of any part of the engine in my boat. I use Rotella 15/40 just like I did for years in all of my heavy trucks. I tear down, reseal, and pressure test the aftercooler every 2 years but it only costs me the price of the O-rings. The core is always clean, but I use a paper media filter. It's customers boats that often have neglected/fouled aftercoolers and I've noticed over the years that the biggest offenders all have Airseps. The turbo inlet, crossover tube and aftercooler all are fouled.Hello Mike, if you are having a lot of issues with turbo charger fouling/coking than you may want to consider a better oil with a better oil additive package. There are oils out there that offer a better additive package that won't oxidize and turn into the tar like substance you speak of at high charge air temps. These oils are made for engines that use CCV systems for Tier 4 off highway engine products. Are you using a CJ-4 type oil and if so, is it semi-synthetic or mineral based only? Curious.
Hello Mike,Thanks, but I'm actually OK. No fouling of any part of the engine in my boat. I use Rotella 15/40 just like I did for years in all of my heavy trucks. I tear down, reseal, and pressure test the aftercooler every 2 years but it only costs me the price of the O-rings. The core is always clean, but I use a paper media filter. It's customers boats that often have neglected/fouled aftercoolers and I've noticed over the years that the biggest offenders all have Airseps. The turbo inlet, crossover tube and aftercooler all are fouled.