Excessive blowby...
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Cruiser
Joined: Oct 2008
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From: Paradise
Excessive blowby...
I've been suffering from a bad blow by problem. I've researched and read all articles and posts in this site and many others.
At the end of any 4-6 hour ride, whether riding hard or not, I have about 1/4 teaspoon of oil around the bottom edges of the SEAC backing plate and filter. Most folks would say it's oil too full and I agree with that. But in my case I removed enough to where I was way below the full mark both checking hot or cold last night.
I came home after riding 6 hours today and checked the oil level after about 20 minutes in the garage. Oil level was about halfway up. So I felt behind the seac and no oil...I was pretty stoked. But for fun I took the cover off and the filter to make sure. There it was again...loaded up around the lower edges and now dripping.
My set-up is 103 stg II/255's, FatcatBoss, SEST, with stg I street port heads, zippers maxflow AC, and HD premium oil cooler.
Could it be crank run out? Could it be cam adjustment? what the heck is it..??
At the end of any 4-6 hour ride, whether riding hard or not, I have about 1/4 teaspoon of oil around the bottom edges of the SEAC backing plate and filter. Most folks would say it's oil too full and I agree with that. But in my case I removed enough to where I was way below the full mark both checking hot or cold last night.
I came home after riding 6 hours today and checked the oil level after about 20 minutes in the garage. Oil level was about halfway up. So I felt behind the seac and no oil...I was pretty stoked. But for fun I took the cover off and the filter to make sure. There it was again...loaded up around the lower edges and now dripping.
My set-up is 103 stg II/255's, FatcatBoss, SEST, with stg I street port heads, zippers maxflow AC, and HD premium oil cooler.
Could it be crank run out? Could it be cam adjustment? what the heck is it..??
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Cruiser
Joined: Oct 2008
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From: Paradise
Hey Dawg...My long time sales buddy went to another location last year and I bought this from his dealership...St.Augustine. It started life out as a base 96" stock bike.
But, my dealer over the years, with no problems, has been here in Jax @ Ademacs. Anyway, leakdown 3 weeks ago showed loss of compression in rear cyclinder. It was suggested that the valve train wasn't seated well and thus rings gone, cylinders scared up, etc, etc...
Ademacs took it in and fixed it. basically a new build which i had to break in again. During this break in period, it's had this bad blow by, which the first build suffered from as well. Soooo...looks like back to Ademacs for some sniffing around. I think you're onto something on the cam chest...the oil pump isn't adjustable.
Any other considerations...??
But, my dealer over the years, with no problems, has been here in Jax @ Ademacs. Anyway, leakdown 3 weeks ago showed loss of compression in rear cyclinder. It was suggested that the valve train wasn't seated well and thus rings gone, cylinders scared up, etc, etc...
Ademacs took it in and fixed it. basically a new build which i had to break in again. During this break in period, it's had this bad blow by, which the first build suffered from as well. Soooo...looks like back to Ademacs for some sniffing around. I think you're onto something on the cam chest...the oil pump isn't adjustable.
Any other considerations...??
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Cruiser
Joined: Oct 2008
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From: Paradise
It goes under the knife again next week. We'll see what the dealer says. With the cylinders/valves/heads being just re-done...and the blow by continues...I'm guessing it's in the bottom somewhere...
Stay tuned...
Stay tuned...
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Cruiser
Joined: Oct 2008
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From: Paradise
I think at this point I need to have them check run-out to see if I've surpassed the .014 threshold which could've beat up the pump. Also, I'll look at the pump check valve and spring...
Bottom line is it seems I'm getting too much oil in the crankcase which then gets pushed up and out the breather vents...a little blow by is fine...but not at this level...
Bottom line is it seems I'm getting too much oil in the crankcase which then gets pushed up and out the breather vents...a little blow by is fine...but not at this level...
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Cruiser
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From: Paradise
Just dropped it off and talked to the tech a little. Dropped a bomb on me...
The Moco stated that they had to fix the top end to eliminate the blow by, even though he didn't really agree, but that's the protocol and it has to be followed.
After 1000 mile break (again) with more blow-by and he states that when he was initially looking at it he emptied 14 ounces of oil from my crankcase. So now the plan is to check the oil pump; crank run-out; all o-rings; complete cam chest seals; etc...I think we'll finally get this licked...
I'll share more as this moves along...
The Moco stated that they had to fix the top end to eliminate the blow by, even though he didn't really agree, but that's the protocol and it has to be followed.
After 1000 mile break (again) with more blow-by and he states that when he was initially looking at it he emptied 14 ounces of oil from my crankcase. So now the plan is to check the oil pump; crank run-out; all o-rings; complete cam chest seals; etc...I think we'll finally get this licked...
I'll share more as this moves along...
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