The Ford Barn - View Single Post - German H-block?

rotorwrench · 01-11-2021, 06:42 PM

The engines manufactured in the Koln plant generally have their casting marks. I think the 29T was early and G29T was later. They have different heads and a distributor mounted on the back above the oil pump. French engines of the early type usually have their distinct SAF casting marks.

That one appears to be 81A type manufactured in the US. The Canadian type would be C81A. I'm not sure about engines manufactured at the Dagenham plant in England as far as prewar but the 221 wasn't as popular in the UK due to tax problems.

All of the USA 239 engines have round port holes in the center of the deck. That one has the trapazoidal or keystone shape indicating a 221. If it has 3 3/16" +.010 pistons then that would be about as far as a 221 will go normally. A sonic check of the cylinder wall will tell the current wall thickness. I've never seen a 239 with the keystone ports. I have seen some 221 engines that were sleeved for larger bores though.

01-11-2021, 06:42 PM	#3
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: German H-block? The engines manufactured in the Koln plant generally have their casting marks. I think the 29T was early and G29T was later. They have different heads and a distributor mounted on the back above the oil pump. French engines of the early type usually have their distinct SAF casting marks. That one appears to be 81A type manufactured in the US. The Canadian type would be C81A. I'm not sure about engines manufactured at the Dagenham plant in England as far as prewar but the 221 wasn't as popular in the UK due to tax problems. All of the USA 239 engines have round port holes in the center of the deck. That one has the trapazoidal or keystone shape indicating a 221. If it has 3 3/16" +.010 pistons then that would be about as far as a 221 will go normally. A sonic check of the cylinder wall will tell the current wall thickness. I've never seen a 239 with the keystone ports. I have seen some 221 engines that were sleeved for larger bores though. Last edited by rotorwrench; 01-11-2021 at 07:00 PM.