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993TT turbo oil scavenging pump retrofit question
Hi.
I have a 90' C4 converted by Protomotive to a stage 4 twin turbo. During an engine refresh I did recently I installed a 993TT turbo oil scavenging pump to capture and return the post turbo oil back to the case. Old Protomotive design used a gravity feed back to a tube welded to the lower valve covers. Am having flywheel seal leaks now that all is back together. Second seal did same thing despite what I thought was much care. Have rebuilt air cooled 964 engine in past without leaks so I think I have decent knowledge and skill. Red posts on seal thoughts... Did no see anything definitive on root cause for situations with no crank scoring or other defect issues. QUESTION: Is it at all conceivable that my 993tt scavenge pump is contributing to my RMS leak? Did not make internal provisions for the 993 part as it looked pretty simple/obvious. Any thoughts or typical flywheel seal issue that just needs sorted? Thanks Joe. |
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