360 engine vibration
Ok parts arrived. New damper and new oil seal fitted. Good news is the pulley no longer wobbles on the inner part and outer part. So balancer and pulleys run true. Bad news is its still has this vibration.
But im pleased I have the crank correctly balanced front and rear now. Run the engine for about 45 mins with sea foam in and no improvement, but i will run it for a bit long and remember its not yet Uk registered so i cant go on a drive :( .
So revisited the compression readings and drawn them out as the engine is instead of a list 1 to 8, and I think Ive found something interesting the even bank 2- 8 are lower readings than 1 -7. The readings are the same wet , which points to valves. Now you remember this is the side that had the valve rockers on crossed over and the pushrods had worn a grove in the head from dragging. Maybe these valves are burnt, carboned, rusty all any of these to create a slight leak off? Im going to do a cylinder leak off test tomorrow which might tell more.
The first readings for 5 and 7 I couldnt be bothered to remove the hedman headers to get the compression gauge in place, instead just aknowledged i had good compression with my finger over the hole. But in the end I thought I need to to prove a point with accurate data, so loosened the header enough to get the compression gauge in place.
Ok parts arrived. New damper and new oil seal fitted. Good news is the pulley no longer wobbles on the inner part and outer part. So balancer and pulleys run true. Bad news is its still has this vibration.
But im pleased I have the crank correctly balanced front and rear now. Run the engine for about 45 mins with sea foam in and no improvement, but i will run it for a bit long and remember its not yet Uk registered so i cant go on a drive :( .
So revisited the compression readings and drawn them out as the engine is instead of a list 1 to 8, and I think Ive found something interesting the even bank 2- 8 are lower readings than 1 -7. The readings are the same wet , which points to valves. Now you remember this is the side that had the valve rockers on crossed over and the pushrods had worn a grove in the head from dragging. Maybe these valves are burnt, carboned, rusty all any of these to create a slight leak off? Im going to do a cylinder leak off test tomorrow which might tell more.
The first readings for 5 and 7 I couldnt be bothered to remove the hedman headers to get the compression gauge in place, instead just aknowledged i had good compression with my finger over the hole. But in the end I thought I need to to prove a point with accurate data, so loosened the header enough to get the compression gauge in place.