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04 Si(EP3) AC Compressor Replacement [solved]

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Old Jul 9, 2023
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04 Si(EP3) AC Compressor Replacement [solved]

Hey! I'm trying to replace the ac compressor on my ep3 without dropping the subframe. I've heard it can be done similar to how the alternator is done. That is, up through the passenger headlight by moving back the radiator. However, upon taking everything off, the very last bolt to complete this removal seems to be impossible to remove as it is blocked by the subframe. Again I'm novice so I'm trying to avoid dropping the subframe even a little. Any ideas? I'll attach a image of the bolt and of the bar circled in red if I can figure out how.
Thanks!


The ac compressor bolt pointed to in red

The bar blocking it(subframe?) Highlighted in red.
​​​​

Last edited by zoom070; Jul 9, 2023 at 09:06 AM.
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Undo an engine mount, raise or lower the engine, and then get the bolt? That's what I would try
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Originally Posted by Colin42
Undo an engine mount, raise or lower the engine, and then get the bolt? That's what I would try
This may be a dumb question but you said "an engine mount". Could I undo a singular corner? I'd probably only need an inch or two. But I'd need a cherry picker for that would I not?
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Whichever mount is closest, probably where the belt and pulleys are. 2x4 and a floor jack under the oil pan.
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Originally Posted by Colin42
Whichever mount is closest, probably where the belt and pulleys are. 2x4 and a floor jack under the oil pan.
Won't damae the engine? I've always assumed the oil pan wouldn't be able to hold the weight of the engine. I suppose it's got the 3 other mounts though in this situation? Thanks by the way!
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

hondas have sturdy pans.
changing clutch involves jack under engine holding it up
other manufacturers have pans that can get a dent, hondas seem ok
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

The 2x4 spreads the weight it will be fine
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

So before I try the "lift the engine" idea, I found a YouTube video of someone doing this by completely removing the radiator which gave him access to the bolts from the front looking back. Is there a chance someone here can confirm it's possible this way? I'm unable to try either way until Friday due to some upcoming events this week.
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Old Jul 9, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Then you have to drain the coolant.....
engine mount is a lot simpler.
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Old Jul 10, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

You don't need to fully remove the bolt. Use a wrench or socket to loosen then remove the compressor with the bolt still in the hole.

However, I don't see how it's possible to remove the compressor without dropping the subframe.
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Old Jul 10, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

Was able to do it by removing the radiator completely and then was able to access the bolts from the front looking back. I was nervous to drop the subframe or mess with motor mounts because I live in the rust belt and bolts snapping and/or rusting out is extremely common
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Old Jul 11, 2023
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re: 04 Si(EP3) AC Compressor Replacement [solved]

You're more likely to break a radiator support bracket bolt than any engine mount or subframe bolt. But I understand what you're saying. I'm in Ohio and deal with rusty and crusty bolts all the time.
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Old Jul 11, 2023
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Re: 04 Si(EP3) AC Compressor Replacement [solved]

Originally Posted by BrotatoChip
You're more likely to break a radiator support bracket bolt than any engine mount or subframe bolt. But I understand what you're saying. I'm in Ohio and deal with rusty and crusty bolts all the time.
I thought on saying that too...
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