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Old 06-08-2014, 03:49 PM   #1
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2000 GT rebuild

Okay so I pulled my motor after it lost 90% of compression in cylinder 3. So I am in the process of rebuilding it and I really don't feel like pulling the heads off to pull the pistons through. Would it be easier to pull the crank out and just pull them out through the bottom or should I just embrace the suck and pull the heads?
Any advice helps

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Old 06-08-2014, 04:02 PM   #2
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You might be able to get it out that way, but you'll have an EXTREMELY difficult time getting the piston and rings back in that way.

Be one with the "suck"...
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Old 06-08-2014, 04:24 PM   #3
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Well I'm trying to pull the crankshaft and i can't find anything on line about pulling the crank. Only on taking off the pulley.

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Old 06-08-2014, 04:44 PM   #4
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You should have a repair manual when doing this sort of work.
If you're going to do this, you should do it correctly or else you'll be setting yourself up for a lot of frustration down the road.
I know that the heads look like a b!tch but would you rather do the head gaskets now while the engine is out of the car? Or, possibly, 6 months from now, bending over a fender to do the work?
There are 6 bolts securing each of the main caps to the block. Four are right there on the cap and two screw in horizontally on either side from the outside of the engine block.
Those cap bolts are NOT reusable. You need to buy new ones when you put it back together... Same thing with the head bolts.
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Old 06-08-2014, 05:56 PM   #5
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Well I don't plan on keeping the car very long after I get it done (dick move I know)

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Old 06-08-2014, 06:10 PM   #6
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Lol
In that case, it may be cheaper and easier to just find a used, running engine to swap in and be done with it.
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Old 06-08-2014, 06:24 PM   #7
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Junkyard wants about 400 for a motor and there's no guarantee that it runs. But I'm probably just going to nut up and shut up and pull the heads

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Old 06-08-2014, 06:35 PM   #8
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Do you have any suspicions as to why that cylinder has lost compression?
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Old 06-08-2014, 07:10 PM   #9
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Wet and dry compression test confirmed it

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---------- Post added at 12:10 AM ---------- Previous post was at 12:10 AM ----------

But as to why I have no idea

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Old 06-08-2014, 07:24 PM   #10
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What were the results of the wet test? Did it raise the compression reading or did it remain the same?
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Old 06-08-2014, 08:42 PM   #11
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Went up to about 35psi and dry test was at 10psi

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Old 06-08-2014, 08:54 PM   #12
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Hmmm.
This is probably something related to the head or head gasket.
Well, keep us posted what you find...
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Old 06-09-2014, 06:25 AM   #13
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How many miles does it have on it?
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Old 06-09-2014, 08:34 AM   #14
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77xxx not sure on the exact number

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Old 06-09-2014, 08:41 AM   #15
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Wow lol that leaves me discouraged about my 120k engine O.o
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Old 06-09-2014, 06:05 PM   #16
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Supercharger and I absolutely hate being passed so yea. Plus every one thinks hey a mustang I'm gonna pass it because it's slow and they always seem surprised that they get smoked

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Old 06-10-2014, 12:06 AM   #17
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Sooo instead of trying to work them out of the bottom I took the heads off. Only to find some not so surprising results

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Old 06-10-2014, 12:14 AM   #18
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YIKES!!!

You never mentioned a supercharger.
Lol. Those cast pistons really are the weak point.
So what HP is that engine tuned to?
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Old 06-10-2014, 06:56 AM   #19
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Yeah that'd do it...

I would honestly just find a running PI motor and swap it and call it good if it was me. Will probably be cheaper in the end anyway. Some places will guarantee them to run, you just have to call around.
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Old 06-10-2014, 08:09 AM   #20
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Well I bought pistons connecting rods and everything so a rebuild is in place

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