turbokinetic
Member
- Joined
- Jan 29, 2008
- Messages
- 256
Hey folks. Working on the accessories for my Buick Turbo engine today.
It wiped 4 cam lobes and had main bearing issues due to previous owner
neglect. There was an inch of sludge in the oilpan. The engine had an
oem-style nylon timing gear when I got it. This was intact (so I replaced
it with metal one) however there must have been a previous failure. The
debris in the engine block that plugged the oil galleys, plus the debris in
the turbo looks like nylon chips. It didn't wreck the turbo shaft or
anything, just the bearings. Wish I could say the same about the rest of the
engine.
The turbo (which I rebuilt less than 50 miles ago) had loose shaft and was
leaking oil out around the turbine housing. I found ALL KINDS OF crap in
it. Pictures forthcoming. All the turbo fittings and lines, and oil filter
were brand new. This had to come from the engine.
Do you guys recommend plugging the filter bypass so the engine has
full-flow filtration? Personally I'd rather have "low oil pressure" than
normal oil pressure but all sorts of debris circulating in the engine. If
the filter plugs up; there is already some sort of failure going on anyway,
in my opinion.
I do not want an auxiliary filter for the turbo oil. I may put a "screen"
in the line (hydraulic pump load-sense line screen). It is a small (C
battery size) affair with 1/4" NPT ports. The mesh inside is about 1/4 the
size of the turbo bearing oil holes. The Turbonetics turbo on my other car
came with a screen and oil restrictor in the oil inlet.
Is there such a thing as a "too big" oil supply line? Can it overwhelm
the turbo and cause oil to leak around the exhaust side? I have seen (in
industry) turbo oil line restrictors that had .100 to .150 orifices. My
supply line is 5/16" whereas the original line was only 1/4".
Thanks in advance,
David
It wiped 4 cam lobes and had main bearing issues due to previous owner
neglect. There was an inch of sludge in the oilpan. The engine had an
oem-style nylon timing gear when I got it. This was intact (so I replaced
it with metal one) however there must have been a previous failure. The
debris in the engine block that plugged the oil galleys, plus the debris in
the turbo looks like nylon chips. It didn't wreck the turbo shaft or
anything, just the bearings. Wish I could say the same about the rest of the
engine.
The turbo (which I rebuilt less than 50 miles ago) had loose shaft and was
leaking oil out around the turbine housing. I found ALL KINDS OF crap in
it. Pictures forthcoming. All the turbo fittings and lines, and oil filter
were brand new. This had to come from the engine.
Do you guys recommend plugging the filter bypass so the engine has
full-flow filtration? Personally I'd rather have "low oil pressure" than
normal oil pressure but all sorts of debris circulating in the engine. If
the filter plugs up; there is already some sort of failure going on anyway,
in my opinion.
I do not want an auxiliary filter for the turbo oil. I may put a "screen"
in the line (hydraulic pump load-sense line screen). It is a small (C
battery size) affair with 1/4" NPT ports. The mesh inside is about 1/4 the
size of the turbo bearing oil holes. The Turbonetics turbo on my other car
came with a screen and oil restrictor in the oil inlet.
Is there such a thing as a "too big" oil supply line? Can it overwhelm
the turbo and cause oil to leak around the exhaust side? I have seen (in
industry) turbo oil line restrictors that had .100 to .150 orifices. My
supply line is 5/16" whereas the original line was only 1/4".
Thanks in advance,
David
