Well Hello 914 Community!! It has been quite sometime now, and I have felt the need to get my 914 back up and running. As an update, I had an engine issue about 5 years back now, and it has been sitting since then... other things in life got in the way, but id really like to get it back up and running again, then finish the job and get bodywork, paint and interior done as well once she is running again.
After taking the valve cover off on the driver side, it was very apparent what when wrong years back, had a valve spring failure, on cylinder #2 exhaust valve. This was probably a major oversite on my part when building the engine up, but I didn't replace the valve springs, and looking back now at some old pictures from the rebuild I can see that there is visible rust on the springs, probably from sitting in the engine for years unused before I bought and rebuilt it. So a $100 worth of new parts likely could have saved me form this mess... not sure why I didn't replace them... Lesson learned!
So here we are now. My plan is to drop the engine, take the heads off and inspect everything. Feeling the valve as it sits now, the valve guide still feels nice n snug on the valve stem, certainly no wobble or looseness. Hoping (praying) that there isn't bad damage to the piston head. This incident happened while tuning the engine in the garage, so we cut the engine as soon as we heard the large bang sound, but will find out soon what domino affect it had on surrounding parts. Don't see any damage to the rocker arms and that assembly, and all pushrods look to be in great shape, along with pushrod tubes.
Problem is that I cant find all the parts of the broken spring and one half of the valve retainer. Looked in the pushrod tubes and noting in there. My gut says that I need to fully crack the case open and clean out the inside to make sure there isn't any remaining pieces of the spring floating in the engine case, does that sound like the smart thing to do to everyone else as well?
From the visible damage we can see now, which doesn't look drastic, on the spring seat surrounding the valve guide, does that look like it needs to be machined or repaired, or can that be used as is?? Obviously replacing all the valve springs, retainers, and valve hats. Should I replace all the exhaust valves themselves as well while I'm in there?? I have been reading they have a shorter life anyway?
Any and all comments / suggestions welcome.
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