Oliver Super 55 Big Bore Kit

[magnumpowers]

Hello Everyone. I'm new to the BB and have some questions regarding rebuilding my Super 55 Diesel engine. Mine being very old, lots of blow-by is in need of some engine work. I see there are 3-1/2", 3-5/8" and 3-3/4" bore kits. I assume if I up the sleeve size the block needs to be bored to accept the larger sleeves. Is that correct? I am not sure if any engine machine shop can do the job without screwing up my block so that has me a bit concerned. Please advise on this. Also the super 55 only has 15:1 compression and I am wondering if larger pistons will help starting in cold weather being that would increase compression and heat? And also if I go with 3-3/4" pistons will I see more power or would the injection pump need to be recalibrated? And can these old American Bosch pumps be re-calibrated?

Thanks Much,
Charles

 

[chucksoliver77]

the 3 3/4 sleeves will go right in with no machine work, however with the diesel I wouln't go bigger than 3 5/8

 

[magnumpowers]

(quoted from post at 16:50:12 03/10/21) the 3 3/4 sleeves will go right in with no machine work, however with the diesel I wouln't go bigger than 3 5/8

Thanks for the info and advise!! I am curious why no bigger than 3-5/8" for diesel? Starter not powerful enough or?

 

[J. Schwiebert]

First of al if you do not want to waste your money you will need to have the head rebuilt so you have the correct vale protrusion! That means a set of valve seats installed in the head! My e-mail should be open. Please send me a reply and I will explain it. J.

 

[magnumpowers]

(quoted from post at 06:40:45 03/11/21) First of al if you do not want to waste your money you will need to have the head rebuilt so you have the correct vale protrusion! That means a set of valve seats installed in the head! My e-mail should be open. Please send me a reply and I will explain it. J.

I tried to contact, email and DM turned off. You can call me 971 226 9006

 

[Dick W.]

Look up my reply in your other post.