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Morissey

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Everything posted by Morissey

  1. Morissey
    Ah got you. Yes, I thoroughly sprayed the walls and the cavity at the crown with cleaner and rinsed out.
  2. Morissey
    I have rebuilt the heads, so no chance of that :) Thanks!
  3. Morissey
    You were absolutely correct. The cat is the where the debris came from. Shook the header and some more pieces came out. Turns out the rock I rolled over last year had put a good gash on the unit and it had been waiting to get into the head. Searching for a good used cat to replace.... Thanks!
  4. Morissey
    Ahsai - What exactly is the TDC whistle test?
  5. Morissey
    Hmmm... I did mark the timing location of the bolts on exhaust cams prior to disassembly. So I put everything back on including the original tensioners and the marks did not line up on either bank while allocating the cams using the timing tool. I have to move the crank off TDC for the marks to line up, thus misaligning the cam notches relative to the cam cover. The misalignment is identical on both banks, and I am sure the chain did not skip and both sprockets were held in original position on the chain the entire time. I did replace the chain guides on both cams and wonder if that has caused the discrepancy. What are your thoughts on this? Should I button the engine back up aligned to original marked position?
  6. Morissey
    Thanks for the response and confirmation that item B is not essential. In addition, I am replacing all tensioners with new ones so pumping them with oil should do the job well enough.
  7. Morissey
    Excellent point. I will do that. Thanks
  8. Morissey
    Hi, I am back. Heads and cams reassembly is complete and ready to time the engine. I have the timing tool, but do I need the Porsche tensioning tools as well? I have read mixed conflicting views on the topic. The shop manual clearly requires them in the procedure. 1. Do I absolutely need these to get the timing right? Item B in image below 2. Is there a hack or trick to avoid this tool? I have read pumping the stock tensioners in oil would set the correct pressure...not sure about that 3. Does anyone have a set they care to rent? I have searched and realized they are not readily available for purchase or rent. Any insight/help would be much appreciated.
  9. Morissey
    Oh, does not seem to be magnetic. Although it was tough to tell as it is a small thin piece and the magnet kept gravitating toward the valve head.
  10. Morissey
    I am the only one who works on this engine. The last time i did anything engine related was check the air filter and put it back. 4K miles prior to that was an oil change. Perhaps something went in through the intake?
  11. Morissey
    Coming back with some updates. My hunch was correct. An exhaust valve on cylinder 6 is not seating. My theory was a burnt guide or broken spring. Turns out neither! See attached pic. The object is a thin seemingly grooved piece of metal. I have yet to understand where it came from. I have checked IMS (in great shape, but will replace with LN for good measure) oil filter, oil, spark plugs, and of course the cams, covers and heads. I find nothing to be out of ordinary Both heads are off and with the machine shop for complete crack/leak test and valve jobs. I left everything in tact so they perhaps can try and determine the source of metal debris. While the machine shop does their assessment, your perspectives are welcome. Also, while I'm at this I have determined following additional projects to be worth the time and $. Any feedback on what I may be missing or overdoing is welcome. Care details: 2001 Boxster s with 50Kmiles 1. Water pump & thermostat (they are the originals) 2. IMS 3. RMS seal 4. Clutch (has ~ 40% left) 5. Oil separator 6. Cam chain rails
  12. Morissey
    Yes, I will test all 3 on that bank. Thanks.
  13. Morissey
    I was afraid you would say that. I am pretty sure the leak is well over 20%. I do need to be for certain, so I will acquire a tester and report back.
  14. Morissey
    I don't know the leakdown value. I could not get my hands on a tester so I put air directly into the cylinder and looked/listened for the source of leak. On compression test it maxes at 40 psi.
  15. Morissey
    Update: I am afraid you are correct. I have a leak into the exhaust at TCD on cylinder #6. What should be my next diag move to determine extent of damage? or is this pretty much a head removal and valve job? Thanks!
  16. Morissey
    No coolant/oil mix. The culprit is definitely #6. When running at idle there is a bit of backfire sound here and there. Thinking valve issue right now, but I will do the proper test.
  17. Morissey
    I will do a leakdown test on #6 and come back. Thanks.
  18. Morissey
    Update:(2001 Boxster s 50K miles) I have ruled out ignition components, fuel and vacuum as causes with a good deal of confidence. Never say never... I have checked the physical cam timing and all is per spec. Cleared all codes and it consistently gets flashing CEL and P0306 only. I have cleared 3 times just to be sure and same code came back. I plugged in a compression gauge onto cyl 6 and it got up to 60 psi. I tested two other cylinders on bank 1 and they both read 100 psi. Please feel free to give me your diagnostic thoughts. Thanks!
  19. Morissey
    Thanks for the post. The thread is still valid for my case as I have rough idle and no power. If I can do a physical check of timing to rule out a chain skip or other internal mechanical issue, I can then move on to other possible cause diagnosis.
  20. Morissey
    When checking the bank2 timing with engine on exhaust TDC, the exhaust cam notches are perfectly aligned, but he inlet cam notch is not exactly at 90 degrees. Is this a problem??
  21. Morissey
    I have checked the timing visually using the helpful post here: http://986forum.com/forums/performance-technical-chat/26418-diy-setting-cam-timing-m96.html I did the procedure once and all seems correct on the car. I will be doing the procedure again tomorrow and will post photos so you can confirm my finding. I will then move onto the MAF as I have ruled out spark plugs and coils.
  22. Morissey
    I am trying to understand how to check the inlet cams timing and position indications On the exhaust side, yes the notches on the cam are vertically aligned with the notches on the covers. I will now look into the DIY link and check the inlet cam positions. I will come back with my findings. Thanks!
  23. Morissey
    I am going for the MAF and vacuum leak checks next. Should I drain and check the oil? Yes, I confirmed the exhaust cams (with the notches - 5 chain setup) were at 90 deg. How do I check the inlet ones? Do they have position indicators? Thanks!
  24. Morissey
    Checked the cam timing and both banks are on the mark aligned with the timing notches while flywheel at TDC. Plugs: No oil, no foul firing signs, looks they are in good shape (approx. 20K miles on them) Coils: Boots bone dry, clean, elastic and overall look great. Resistance measures correct and consistent among all including one pack from a cyl that did not trigger a code for good measure.
  25. Morissey
    Thanks Schnell. Is there a DIY write up you can point me to on checking the timing?
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