Honda 1.7 Cylinder Head Heat Caution
Some issues to be aware of when checking out late model 1.7L heads like the D17A1. These heads have the exhaust ports come together inside the head and merge to one larger port. I have found that they seem to retain more heat in the cylinder head, which causes these heads to warp easily. They seem to warp the most on the exhaust side of the deck surface. These heads should be pressure tested. We have found cracks inside the exhaust port on heads that did not get severely overheat- ed. It seems this new design exposes the head casting to much more heat.

Jeffrey Myers
MAR Automotive Inc
Philadelphia, PA
December, 2014