Paxton/Nelson supercharger issue - losing fluid, occasional large exhaust smoke cloud
Hey guys,
I've got a Paxton/Nelson SN-89 supercharged 87 6-port. Two days ago on the way home from work, after a downshift to 3rd during deceleration on an interchange, I got a large sudden cloud of blue or grey smoke from the exhaust. Engine temp was fine, and it still boosted just fine afterward. There was no discernible loss of power. Upon inspection at home, all fluid levels were okay except the lubricant for the supercharger (which is automatic transmission fluid, for what it's worth,) which was below the low mark on the dipstick. I filled it to a bit over the high mark on the dipstick, and let the car sit 'til today. I tried driving it for about 40 miles, and hit boost a few times. About the second time I hit boost, I got the smoke from the exhaust again. Checked the supercharger lubricant again, and it's back down to about 1/3 of the way above the low mark. So, what's happened? My gut reaction is that I blew a lubrication seal of some sort inside the supercharger, and I'm seeing that come out the exhaust, but I'd like to hear ideas from anyone who may happen to have input. Thanks, Collin |
Originally Posted by MmSadda
(Post 11056709)
So, what's happened? My gut reaction is that I blew a lubrication seal of some sort inside the supercharger, and I'm seeing that come out the exhaust, but I'd like to hear ideas from anyone who may happen to have input.
Or, it could be the TPS, because that seems to cause no end of weird problems for folks. But really, it's a seal in the blower. |
Originally Posted by clokker
(Post 11056756)
Or, it could be the TPS, because that seems to cause no end of weird problems for folks.
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Since I posted this thread originally, I had the blower rebuilt by Paradise Wheels (the company that services the blower and owns the rights to it, etc.) and had an intercooler added and the car re-tuned. I had the smoking issue again, and sent the blower back to Paradise Wheels - they found no moisture in the blower, and no cracks in the casing. If that's accurate, it means I'm getting oil (or something that's causing smoke) sucked into the engine another way.... unless smoke could be caused by running too rich. Is that possible? For what it's worth, it seems to be a greyish smoke, though I could be mistaken.
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If possible maybe there might be some vacuum lines sucking the oil out of the super charger and into the intake ports or something?
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Is the chargers atf low again after the rebuild with the excess exhaust smoke?
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Originally Posted by LittleAznBoy
(Post 11237420)
If possible maybe there might be some vacuum lines sucking the oil out of the super charger and into the intake ports or something?
Originally Posted by SpikeDerailed
(Post 11237431)
Is the chargers atf low again after the rebuild with the excess exhaust smoke?
If it was running too rich on deceleration, could that cause this problem? It's only when the car is run up to 6k rpm or so, and only on deceleration. |
if it's not the SC oil then it is likely a hint that the internal engine oil seals are going.
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Oil control ring on your motor are not sealing. Your engine needs a rebuild. Your decel, followed by a puff of blue smoke confirms its the control rings. Classic test.
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Originally Posted by MmSadda
(Post 11237549)
Not really - the only path between the AFT going to
If it was running too rich on deceleration, could that cause this problem? It's only when the car is run up to 6k rpm or so, and only on deceleration. |
Originally Posted by RotaryEvolution
(Post 11237577)
if it's not the SC oil then it is likely a hint that the internal engine oil seals are going.
Originally Posted by ReZ311
(Post 11237588)
Oil control ring on your motor are not sealing. Your engine needs a rebuild. Your decel, followed by a puff of blue smoke confirms its the control rings. Classic test.
Originally Posted by SpikeDerailed
(Post 11237613)
What are you running for engine management? Are you running a VAF and a blowoff/diverter valve?
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Originally Posted by MmSadda
(Post 11237630)
Thanks for the input. I was starting to consider this as a possibility, tho it's a 30k mile engine... Is it possible it has blown that fast?
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Is it possible the car is just running way too rich on deceleration?
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Originally Posted by MmSadda
(Post 11237630)
It's a Haltech Sprint RE, and there is a blowoff valve installed. Not familiar with the term VAF.
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if you are mechcanically inclined check this,,
check for oil in the charge pipe thats one check the plugs if you see oil on it and if there alot of carbon thats two check the vaccums on the omp lines thats three all this could conclued where the oil burning is coming from . Im guessing that you dont have any emission stuff correct ?? |
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