Jim Grant's Tech Tips
Chevy
Blazer, Oil Leak Sealer
Q:
My '84 Chevy blazer with 160k + miles had severe multiple oil leaks. I
had a garage do a fluorescent dye checked on the engine. After the dye
check was done, the leaks stopped! Engine oil usage went from 4-600 miles/qt.
to over 2k miles/qt. Can these fluorescent dyes cause oil passage blockage?
I'm worried that if this dye did seal these leaks that it could cause
oil passage blockage.
A: Wow
that's impressive! I can't say that the dye check chemical was responsible
for the reduction in oil consumption. The product is made for finding
leaks not sealing them. While the garage was checking your engine for
oil leaks, did they service the PCV system? A faulty PCV system can cause
a variety of oil leaks and be responsible for a high level of oil consumption.
Either way, the dye check products that I'm familiar with, would not in
any way restrict oil passages inside the engine.
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