- Nov 20, 2014
- Boat Info
- 2002 410DA
- Caterpillar 350HP 3126
we drop about 100 rpms in gear as well, seems normal
I would agree I see about 100 RPM drop. My port really needs an adjustment as it drops below 600 in gear and I have to manual adjust up.
Here's is the procedure that Dave from Boatdiesel.com suggested multiple time over the years.
I'm not this Dave by the way...
View attachment 145039
Sometimes its easier (especially the first time or two) to remove the entire water pump off the engine and replace the impeller on the bench. Bonus on a new to you engine is you can get a look at the condition of the pump and insure the seals and wear plates are in good condition.Hey everyone, I am wanting to do my impellers this year, and started looking at replacing my port side engine in my 400 DA (easy side LOL). The fuel cooler line is really in a bad spot, it has an elbow that allows me to rotate it side to side, but I still can't seem to get the required clearance needed. I read that some owners have put on a different elbow to facilitate the impeller removal, has anyone here done this and have a pic?
Hey everyone, I am wanting to do my impellers this year, and started looking at replacing my port side engine in my 400 DA (easy side LOL). The fuel cooler line is really in a bad spot, it has an elbow that allows me to rotate it side to side, but I still can't seem to get the required clearance needed. I read that some owners have put on a different elbow to facilitate the impeller removal, has anyone here done this and have a pic?
You can slide the fuel cooler back (towards rear of engine) about 1/4 inch and flip that fitting and hose around to the other side of the oil pressure sender. Then it is out of the way for good.Thanks so much everyone, I didn't realize that fuel line was just a return. Nervous about opening things up with the mechanical injection. I will remove it and the oil sensor and then it should be easy peasy. I have the backing plates coming in and I will replace both and new o rings.
Thanks for the info. Oil analysis is done annually with the winter layup oil change. Last analysis was this past October (results showed no issues). First time starting her up since then was last week and that's when the knock started. Tech took oil samples, but likelihood of finding anything is slim as the engine was only run for five minutes since last October's oil change. Went from travel lift to slip. Haven't run her since for fear of damaging the engine. Figured I'd wait till CAT looks her over.
As for the check valves, haven't changed them. Quite honestly, wouldn't even know where to look up the parts..
I’m looking to install egt probes. Will someone please tell me what the type and size thread is?
did you ever get another diagnosis on your issue? Curious how you made out
My apologies for the delay, work has been kicking my ass lately... Foley CAT got to it last week. He pulled all the injectors and inspected the cups and found some rust in all six cups, two of them has quite a bit of rust on them. He reamed all the cups to clean them up. He then ran the numbers on testing and rebuilding all the injectors and the cost, given the man hours needed at CAT's hourly rate (Big $$$$), was comparable to just replacing all six injectors.. Decision was made to replace all the injectors. Thankfully, he thought ahead given the supply issues CAT has been having and ordered them when he first looked at the engine three+ ago so they were available immediately.
She now purrs like a kitten.
awesome!! You made the same decision we did, I couldn’t bear tearing down the overhead and putting the old injectors back in, good or not.
did you get the remans or new injectors?