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Thread: What did Chief do to his Mazdas today?

  1. #1661
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
    Location
    N KY
    I'm trying to get some work done around the house before leaving for a meeting tomorrow so I will post my work later on. For now, here's how it all turned out:

    '81 RX-7, '00 Miata SE, '06 RX-8 (wife's), '15 CX-5 GT AWD.

  2. #1662
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
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    N KY
    And now for the work log.

    I had ordered some Mahogany Mica spray paint from Automotive Touchup, received that on Wednesday. I ran some errands on Thursday, stopped in to Pep Boys to peruse their spray paint selection. I was looking for something other than black to use for the majority of the diffuser. I saw some DupliColor Trim and Bumper paint in charcoal with a matte finish that looked like it might do the trick so I bought that.





    I went to another place to buy some 1/2" width 3M double-sided tape to use on the upper part. When I removed it the tape Jet Stream provided came right off so I knew it wasn't very strong.

    Since I had never done any painting on fiberglass before I did some 'net research to find out how to prep things. Basically with a gel coat you need to degrease it first, even before sanding. There were several different methods I found, I tried some acetone but didn't like how it was reacting with the gel coat. In the end I used denatured alcohol to wipe it down several times. Next up was sanding with some 220 grit to scuff the surface. I wiped it down again with the alcohol to remove all the dust and ended up with this:



    Next step was to tape the upper diffuser where I was going to paint it body color. I bought some 3M tape that was touted to be flexible, but it wasn't very for my application. This caused me to use shorter strips in order to get the tape around the curves. I then painted the charcoal. Here is how that ended up:



    Being one piece the lower diffuser was easier to paint:



    Each piece got four coats, I didn't use any primer for this stuff.

  3. #1663
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
    Location
    N KY
    Once that had dried overnight it was on to the next step. I removed the tape on the upper piece and then taped over the charcoal. That ended up pretty much the reverse of what it had been.



    I cleaned the exposed area again with alcohol and then applied primer:



    Four coats of primer applied following the can instructions, after which I lightly sanded it with some 600 grit wet paper. This time I simply wiped it down with a wet rag. Then after a wait of 30 minutes it was time to apply the color:



    I applied three coats again following the instructions. After another 30 minute wait the clearcoat went on. I applied four coats of clear. I let that set up for a few hours and then removed the tape. Unfortunately when pulling it off I had a couple of small chips come out:



    Since I didn't want to redo the whole thing I simply used the bottle of touch-up paint with a brush I already had, it filled in nicely.

    I should also note I painted all the fasteners the same color as where they are used to blend it all in and minimize jarring contrasts.

    Before installing everything I wanted to replace the rubber muffler hangers. I heard some banging over bumps, when I checked the lower diffuser showed signs on contact on the driver's side:



    I had to juggle some hangers around from my son's Protege and Minnie but it got done. The muffler is nice and tight now. Reflectors went into their slots on the upper piece and then both upper and lower were installed.

    I already posted the end result.

  4. #1664
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
    Location
    N KY
    Some shots from today:






  5. #1665
    Now with pictures, but not for you! chiefmg's Avatar
    Join Date
    Dec 2007
    Location
    N KY
    Miata: Time has come for me to head back to work. While out at the local cars & coffee yesterday, when I left I had some stuttering. It cleared up though. Then the exhaust was really loud. When I got home crawled underneath to find one of the bolts connecting the header outlet to the rest of the system had backed off. Tightened that up and it was fine. Then later yesterday when I went to run an errand, I again had stuttering when she was cold. First thing this morning I pulled the spark plugs and found coolant in cylinder 4 (again). Looks like the wife won't be driving her while I'm gone this time.

  6. #1666
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
    Location
    N KY
    Miata: So, back home (finally). I made a few small purchases before I came home. A set of 949 valve stem seals (since I don't know what was used in the P&P head I bought) along with a couple of tools to make the job easier. Today when I bought my wife her daily Starbucks tea I also picked up a straw. This will become clear once I start the job and post some pictures. What, you didn't think I would post pictures?

  7. #1667
    Now with pictures, but not for you! chiefmg's Avatar
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    Dec 2007
    Location
    N KY
    Miata: Finally got started on the cylinder head. Here are the main tools I used:







    Here are the seals:



    949 uses the same exact seal for both intake and exhaust valves. I removed the keepers, retainers and springs on the intake side first, here is what that looked like:



    Compress the spring with the first tool until the keepers are clear of the groove they fit in, then remove them (I used a small magnet to grab them). I used the same magnet to pull out the retainer and spring. I then grabbed the seal with the removal tool, rocking it slightly side to side until the seal popped out. It was good I did this as the very first seal was completely torn. Not sure when this happened but I would have had a massive leak for sure.

    After cleaning everything up I proceeded to install the new seals. First I used some engine oil to lubricate the seals so they would go into place with no damage. Then I unwrapped the straw and put it to use, here is how:



    Had to fold it a little to get it started in the seal. You then push the straw down over the valve stem and use a 10mm socket to seat the seal, like so:



    This keeps the groove at the top of the valve stem from tearing the seal. I was able to push the seals in place with my thumbs, but I did take the precaution of tapping on the socket with a dead-blow hammer. A couple of them weren't quite all the way home so it was good I did this step. All that has to be done then is to put the spring, retainer and keepers back into place. There should be a thin metal washer below the spring, this is the lower spring seat (it gives protection for the aluminum of the head from the spring). I found one missing so ordered a complete set. One thing to note, the springs go into the head with the coils that are the tightest down (you will know when you see this). I found four of mine installed wrong. I tried putting the keepers in by hand but it's very difficult. Instead I used a little trick I read about which is to use some plastic (I used a storage bag). You place the plastic over the top of the retainer once the keepers are in place. Then use the spring compressor and compress the spring until the keepers fall into the groove on the stem. Works great. For now I have everything assembled except for the one valve that was missing the lower seat. Once I get the parts in I will redo all of them as several looked as though someone had taken a Dremel to them and hogged them out. Maybe that is how they are, but I seriously doubt it.

    Apologies for the picture quality, all of our good cameras had no battery so I was forced to use my phone.

    I also managed to locate my old shift and e-brake boots so put those back on, along with the console lid that had leather on it.
    Last edited by chiefmg; 12-18-2017 at 02:11 PM.

  8. #1668
    Now with pictures, but not for you! chiefmg's Avatar
    Join Date
    Dec 2007
    Location
    N KY
    Miata: Got back from our Christmas trip. Went to the dealer to pick up the lower valve spring seats I bought but one was missing. They ordered me another overnight (that is what I call service) and I picked them up yesterday. Today I had a little time in between granddaughters being born so went ahead, brought the head back inside and commenced work.

    Here is one of the seats:



    They are the same for both intake and exhaust, so you will need 16. Here is one of the old ones next to the new factory ones (new one is on the left):



    As you can see they are completely different, and the one I removed has been hacked up. All of them were like this. Since the factory one does not have the markings I have to wonder where the ones I removed came from.

    Here is a picture of a valve spring, the tight coils are shown on the bottom which is installed down nearest the valve:



    I followed same procedure I documented before. I did try something a little different on a couple of the valves where I placed the keepers inside the retainer before setting it in place on the valve stem. This worked ok, although I had to be a little more careful when putting the valve compressor in place.



    Finally, here is how I used the plastic to hold the keepers in place while compressing the spring:



    I would recommend using clear plastic so you can see when you have the spring compressed enough for the keeper to fall into place. And that is all there is to the job. Easy-peasy.

  9. #1669
    Now with pictures, but not for you! chiefmg's Avatar
    Join Date
    Dec 2007
    Location
    N KY
    Miata: Got back from our Christmas trip. Went to the dealer to pick up the lower valve spring seats I bought but one was missing. They ordered me another overnight (that is what I call service) and I picked them up yesterday. Today I had a little time in between granddaughters being born so went ahead, brought the head back inside and commenced work.

    Here is one of the seats:



    They are the same for both intake and exhaust, so you will need 16. Here is one of the old ones next to the new factory ones (new one is on the left):



    As you can see they are completely different, and the one I removed has been hacked up. All of them were like this. Since the factory one does not have the markings I have to wonder where the ones I removed came from.

    Here is a picture of a valve spring, the tight coils are shown on the bottom which is installed down nearest the valve:



    I followed same procedure I documented before. I did try something a little different on a couple of the valves where I placed the keepers inside the retainer before setting it in place on the valve stem. This worked ok, although I had to be a little more careful when putting the valve compressor in place.



    Finally, here is how I used the plastic to hold the keepers in place while compressing the spring:



    I would recommend using clear plastic so you can see when you have the spring compressed enough for the keepers to fall into place. And that is all there is to the job. Easy-peasy.
    Last edited by chiefmg; 12-29-2017 at 10:29 PM.

  10. #1670
    Now with pictures, but not for you! chiefmg's Avatar
    Join Date
    Dec 2007
    Location
    N KY
    Miata: It's been too freakin' cold here for me to want to get out in the garage, also there is something (cold or flu) going around the house and it's been kicking my ass. I did get up to the dealer the other day and ordered a new plug for the cylinder head where the CAS is on other models. Figured while I was getting everything else new on the head I might as well take care of that to prevent any surprises. I also picked up a soft top insulation piece off eBay, it says it won't work on a factory top but I am banking on my ability to do so.

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