Hope all are enjoying a good start to the new season.
For the most part, my season is off to a good start. Lots of projects over the winter, most were "mostly successful" which is pretty good for me. I rarely get it right the first time...
Engine started on the 4th crank, which is typical for my engine after coating the cylinders with MMO per the MMI winter layup. Initially, lots of blue / white exhaust which dissipated after 10 minutes.
But as the engine began to warm, within 5 minutes of starting, I saw oil smoke at the fill cap and removed it to find a steady flow of smoke. Definitely not typical exhaust (CO), it smells like something hot / burning as described elsewhere on the forum.
This level of oil smoke and vapor in the cabin is new for my engine. So I am trying to understand what might cause this sudden increase in oil smoke.
If it was caused by blow-by, I guess I would have expected that to increase more gradually.
I do NOT have a PCV kit. And I can / will install one, but would first like to understand the root cause of this increased oil smoke before I attempt to mitigate it. I don't want to eliminate a symptom that could be masking a more serious problem.
I have attempted to follow the threads on the PCV kits, both from Indigo and MMI. I will admit that I struggled to follow the discourse on the Indigo kit, changing from horizontal orientation to vertical or vice versa. Unless there is a compelling case for the Indigo kit, I always prefer to source my parts from MMI. I must be looking in the wrong place though as I could not find the PCV kit in the MMI catalog and I could not find a pointer to it in any of the associated links.
I have a late model engine which is RWC. I have a sparkling new MMI carb which I did NOT remove, re-build, or touch in any other way over the winter.
I did however remove the distributor to gain access so I could replace the 6" drain nipple that broke off in the block when I drained the water jacket. Timing is close, but likely needs refinement at cruising speed.
For now, I can tolerate the smell in the cabin until I install the PCV kit, but just wondering if there could be a bigger issue here in need of attention.
Thanks for any advice or insights,
Brian
For the most part, my season is off to a good start. Lots of projects over the winter, most were "mostly successful" which is pretty good for me. I rarely get it right the first time...
Engine started on the 4th crank, which is typical for my engine after coating the cylinders with MMO per the MMI winter layup. Initially, lots of blue / white exhaust which dissipated after 10 minutes.
But as the engine began to warm, within 5 minutes of starting, I saw oil smoke at the fill cap and removed it to find a steady flow of smoke. Definitely not typical exhaust (CO), it smells like something hot / burning as described elsewhere on the forum.
This level of oil smoke and vapor in the cabin is new for my engine. So I am trying to understand what might cause this sudden increase in oil smoke.
If it was caused by blow-by, I guess I would have expected that to increase more gradually.
I do NOT have a PCV kit. And I can / will install one, but would first like to understand the root cause of this increased oil smoke before I attempt to mitigate it. I don't want to eliminate a symptom that could be masking a more serious problem.
I have attempted to follow the threads on the PCV kits, both from Indigo and MMI. I will admit that I struggled to follow the discourse on the Indigo kit, changing from horizontal orientation to vertical or vice versa. Unless there is a compelling case for the Indigo kit, I always prefer to source my parts from MMI. I must be looking in the wrong place though as I could not find the PCV kit in the MMI catalog and I could not find a pointer to it in any of the associated links.
I have a late model engine which is RWC. I have a sparkling new MMI carb which I did NOT remove, re-build, or touch in any other way over the winter.
I did however remove the distributor to gain access so I could replace the 6" drain nipple that broke off in the block when I drained the water jacket. Timing is close, but likely needs refinement at cruising speed.
For now, I can tolerate the smell in the cabin until I install the PCV kit, but just wondering if there could be a bigger issue here in need of attention.
Thanks for any advice or insights,
Brian
Comment