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...
Save Used Head Parts Our shop does a lot of cylinder head work. We keep several parts from old cylinder heads in marked boxes. Sometimes you lose an odd ball valve lock that no one keeps in stock. At this point, that box marked “Valve Locks” is worth it’s weight in...
VACUUM CHECKING PORTS WITH EGR HOLES It’s difficult to vacuum test the exhaust valves on the 5 valve per cylinder VW cylinder head and many other heads due to the EGR hole in each port. I’ve found an easy solution. Save the dried silicone from the tip of the tube of...
CLEANING BUCKET STYLE HYDRAULIC LIFTERS Unlike their flat tappet cousins, bucket style hydraulic lifters can often be reused if inspected, validated and cleaned. The problem is taking them apart. I developed this hammer tool to separate the plunger from the body....
INSPECTING VALVES BEFORE REBUILDING A CYLINDER HEAD Using a gasket scraper, clean all carbon deposits from valve heads. Follow this by cleaning with a wire brush and solvent. Keep all valves organized so they will be put back in their original locations in the head....
IN DEPTH DISCUSSION I’ve found another use for a deck height bridge. When replacing seats on race cylinder heads, especially Big Block Chev, I use a deck bridge with an indicator extension to first check where the valve was and should be. Then when machining the seats...