I have the “Optional” U shaped mixing
elbow on my
yanmar 4jh4-hte which is attached to the turbocharger. i have just over 1000 hrs on
engine and not sure that this
elbow has been cleaned or replaced. the
yanmar manual shows the elbow type (approx 120 degree bend) and doesn’t provide any additional information or
service recommendations for the larger U shaped type elbow (see attached pic)
I have read the many forum threads on
exhaust mixing elbows and understand that based on yanmar (replace at 500 hrs or two years) but from the many responses from
forums, it’s best to replace with new elbow, although the time and hours varies greatly from the forum replies.
My question is really more about this particular elbow type. Would there be a different recommendation on
service and replacement for this type? It’s clearly more substantial than the other stock model type and much more expensive! There have been no noticeable problems either visually or in
engine performance degradation. Would it be advisable to at least remove and inspect? Hoping to get more life but also don’t like to push any part past it recommended service life.
Any experienced opinions very much welcomed.
Thank you!