Stripping a bottom end for rebuild
Gents,
I'm pulling apart the original engine that came in my '99 to prep it for a rebuild. I've never done a Miata engine before. Are there any things to watch out for associated with the stuff on the intake side of the block, such as oil cooler/warmer/filter seat thingy or the two sensors near it? Thanks much, |
If you don’t know what your sensors are then that’s a good indicator that you have a bit more research to do on your engine. From my experience do your research and watch plenty of videos of people rebuilding these engines. I recommend Greg from “The car passion channel”. He’s an amazing lad who has built an amazing vvt engine. If boost is in your future consider buying quality rods, pistons and a harmonic damper that can handle such abuse. Get some quality main bolts and head bolts. Check your specs. Check your specifications of your crankshaft, block, valves, etc. if you don’t have the time nor money run it as is. I don’t recommend this because if something is out of spec you’ll be paying a lot more than just machine work in your near future. Also, torque lives matter. Get a rench and can handle low inch pounds. Don’t mix up in-lbs and ft-lbs. |
All I wanted to know is if there are any gotchas when removing those three items from the intake side of the block. Although I've done a handful of clutches, timing belts, etc., and I even do my own alignments, I have never removed/replaced any of those three things before. Anyone else?
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Originally Posted by poormxdad
(Post 1483196)
All I wanted to know is if there are any gotchas when removing those three items from the intake side of the block. Although I've done a handful of clutches, timing belts, etc., and I even do my own alignments, I have never removed/replaced any of those three things before. Anyone else?
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No surprises taking the engine apart. I can take a complete engine down to individual components in a couple hours going slow using basic craftsman wrench/socket set and a harbor freight electric impact (damper bolt on crank). Take pics. Some bolts are longer/shorter on same part. For instance, rear main seal housing...4 bolts, 2 are short 2 are long. Motor mounts and oil pump also have some different bolt lengths. For the rods use an an impact as you won’t be reusing them and it will make it go faster. Make sure to immediately oil the crankshaft and cams and then put them in a climate controlled environment, wrapped up so they don’t rust. Take care when freeing rods from crank and pushing pistons out of the bore so you don’t scratch the crank and cylinder walls. The crank will need to be cleaned via the oil holes. You will need a few cans of brake cleaner for this. Stick the straw into the holes and blastvthe shit out of them. On the front and back of your block are two brass plugs. They will need to be removed prior to cleaning the block. This will allow proper cleaning of oil pathways. You will need to replace them with new OEM pieces (cheap). I made a write up on here about them. Oil plug writeup The above should get you through the dissassembly process and get you prepped for cleaning. The shop can remove the freeze plugs for you. You can do it at home but it’s a pain and is like $20 at shop to knock them out. Hope this helps. Goodluck. |
I found it to be pretty easy. I just kept everything in bags with sharpie notes as I took them off.
I had my machinist clean the block, replace the freeze plugs, bore/hone the cylinders and align hone the mains so I can't give any advice about how to do those things except "don't do them yourself". The main things I remember being annoying later were:
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Thanks all. I'm in no hurry, so I wanted to ask. I have never removed the oil pan or pump, either...
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It only comes off one way. The bottom of the pump is what the pan seals against. That's why pump maintenance is such a pain in the ass. You have to drop the subframe to free the pan first.
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Originally Posted by lyonnate23
(Post 1483183)
I recommend Greg... |
Originally Posted by hi_im_sean
(Post 1483480)
Who came here to ask all the questions OP is asking.....
its funny searching for something on this site and seeing the (now) senior members asking newb questions years ago. |
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