i967mustang 21 #1 Posted March 21, 2014 I have two tractors with K341 engines in them. Does anyone know why one has 11 cooling fins and the other has 13? One has the plug center of the head and the 13 fin has the plug over the exhaust valve. Is one more desirable than the other? Share this post Link to post Share on other sites
bmsgaffer 2,043 #2 Posted March 21, 2014 I know of a 12 and a 13 fin. The 13 fin is more desirable for pullers because the block is a little thicker for boring and running high RPM. I think for the average user running at 3600 RPM it makes no difference. Share this post Link to post Share on other sites
joel_400 59 #3 Posted March 22, 2014 How many head bolts does the one with the plug in the center have? Share this post Link to post Share on other sites
leeave96 487 #4 Posted March 22, 2014 I think all K341 engines had 10 head bolts. 11 vs 13, the 13 fin seems what the "informed" like, but not a deal breaker for me. Share this post Link to post Share on other sites
joel_400 59 #5 Posted March 23, 2014 Ten head bolts is what I was getting at. K341s also had the plug over the exhaust valve not in the center of the head. Thats why I asked the question. Maybe one of his is a 10-14 and not a 16. Just a thought. Share this post Link to post Share on other sites
Don1977 604 #6 Posted March 23, 2014 The heads with the spark plug over the exhaust valve are the latest design. According to Brian Miller these heads lessen the change of plug fouling from cold starts and help provide more power by retaining the majority of the heat in one area. Share this post Link to post Share on other sites