SeriesVtime
Donation Time
Hello all,
I have a Series V that I've been working on for a while years now. She's getting close to being back on the road. Our current issue, and I'm hoping our last, is that it's running rough.
I swapped out the Strombergs with a pair of DCOE 40 Webers, which I rebuilt, and seem to be running fine, except cylinder 1. For grins, I swapped the carbs to rule them out. Still cylinder 1 fires intermittently. When I pull the plug it's smelly and covered with gas. I popped a screw driver into the plug wire and it's got plenty of spark.
So with gas & spark present I decided to check the compression. Cylinders 2-4 have around 150 lbs of compression (is that good, high, low?). But, cylinder 1 has around 90 pounds - argh.
So, the things that come to mind are: rings, valves, cylinder warn or damaged, valve setting and possibly head gasket/wrapped head etc..
Am I missing anything?
Before I start ripping the head off or other major steps, I wanted to check with the group to see if I'm overlooking something stupid.
Some relevant background: shortly after getting it running, it got hot and I lost the head gasket. I tore it down and had the head checked - it required resurfacing, which I did. I have not re-torqued the head since re-installing it.
The weather is great in California right now. I need to be driving my Alpine and not working on it! Any and all help would be deeply appreciated.
Thanks!
Jeff
I have a Series V that I've been working on for a while years now. She's getting close to being back on the road. Our current issue, and I'm hoping our last, is that it's running rough.
I swapped out the Strombergs with a pair of DCOE 40 Webers, which I rebuilt, and seem to be running fine, except cylinder 1. For grins, I swapped the carbs to rule them out. Still cylinder 1 fires intermittently. When I pull the plug it's smelly and covered with gas. I popped a screw driver into the plug wire and it's got plenty of spark.
So with gas & spark present I decided to check the compression. Cylinders 2-4 have around 150 lbs of compression (is that good, high, low?). But, cylinder 1 has around 90 pounds - argh.
So, the things that come to mind are: rings, valves, cylinder warn or damaged, valve setting and possibly head gasket/wrapped head etc..
Am I missing anything?
Before I start ripping the head off or other major steps, I wanted to check with the group to see if I'm overlooking something stupid.
Some relevant background: shortly after getting it running, it got hot and I lost the head gasket. I tore it down and had the head checked - it required resurfacing, which I did. I have not re-torqued the head since re-installing it.
The weather is great in California right now. I need to be driving my Alpine and not working on it! Any and all help would be deeply appreciated.
Thanks!
Jeff