This is a list of frequently asked questions. If your specific question is not answered here, please contact us.
Q
: Why does my turbocharger leak oil from the tailpipe after I shut down?
A: The outlet check valve is bad, allowing oil to fill the bearing housing past the point of the seal ring.
Q: I am having trouble reaching manifold pressure. Can I adjust my controller myself?
A: Some controller types can be field adjusted to help with manifold boost. Two such are the Variable Absolute Pressure Controller and the Density Controller.
Examples following:
- To increase manifold pressure turn adjusting screw counterclockwise.
- One full turn should give you one inch
- Recommend turning counterclockwise 2 full turns, if too much back up slightly
To adjust density:
- On square adjusting bolt, turn clockwise to increase manifold pressure.
- Approx. 1/4" turn should suffice
The latest revision of Lycoming Service Instruction No. 1187 sets forth procedures and required equipment for adjusting density controllers in the field.
Q: Why don't my housings line up with my induction or exhaust?
A: The compressor and turbine housings need to be rotated per the installation instructions.
Q: Why does my 210 lose 1" per 1000 ft of altitude?
A: The absolute controller is adjusted too far in. The wastegate is closing too early making the PRV relieve the extra upper deck pressure.
Q: Why does my manifold pressure jump as I advance the throttle?
A: The wastegate butterfly valve is sticking. Try some mouse milk on the bushings.
Q: How long should I idle before shutting down?
A: On Garrett systems that have a gravity drain you should idle at least 4-5 minutes. Systems that are scavenged require 2-3 minutes and Rajay systems don't require any at all.
Q: Why do I see exhaust stains around the turbine housing bolt holes?
A: Your bearing housing is deteriorating, causing exhaust leaks.
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