Lincoln Town Car - Complete replacement, how to clean?

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aarondale
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Lincoln Town Car - Complete replacement, how to clean?

Postby aarondale » Sun Jun 18, 2017 1:05 pm

I have a 2007 Lincoln Town Car. Uses a fixed orifice with accumulator system.

Last year I bought the car and the Evaporator and compressor drive seal was leaking, so I replaced with new: evaporator, fixed OT, low-line from evaporator to accumulator, accumulator, compressor, oil and refrigerant (without stop leak).

Now, a year later, it just doesn't work if ambient temps are above 77º. High side pressure doesn't get very high (about 160) and low side doesn't get very low (about 90). I added a little refrigerant to see if it had leaked, but both sides went up evenly. I couldn't get the pressures to separate, meaning low side low and high side high.

What I figure is that the condenser was trashed with stop-leak by the previous idiot and the compressor I bought was from Vato-zone, so it probably just killed itself anyway, crappy reed valves who knows.

My plan now is to just replace everything else and start new to see if that gets it working again, but I hope I only have to do this ONCE.

So, what should I replace, what should I flush, what would you do?

I am thinking I will replace, with all OEM equipment: Compressor, high-side line with muffler, condenser, OT, accumulator.

That means I will be reusing and/or cleaning: low line from evaporator to accumulator (purchased last year), low line from accumulator to compressor, high line from condenser to OT/evaporator, evaporator (purchased last year).

What are the odds that the evaporator has junk in it too?

Open to your advice!
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bohica2xo
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Re: Lincoln Town Car - Complete replacement, how to clean?

Postby bohica2xo » Sun Jun 18, 2017 2:31 pm

That is a CCOT system, so the O/T should have stopped any trash before it got to the evaporator.

If the compressor was shedding debris the condenser is the primary filter. I would contact Tim at AC Kits for replacement compressor & condenser - the condenser on that car is also the trans cooler.

Your "new" lines are straight with no mufflers, so you can flush them out with solvent. Mineral spirits, Stoddard solvent, etc will do the trick, just blow air through them until you can't smell solvent. Obviously "odorless" solvent is not what you want...

I would start with the O/T, see what it looks like. The really bad sealers will harden up on the screen like dirt clods. If it is just full of metal & black stuff you are just chasing a couple of failed compressors - and seeing what made it past the parallel flow condenser.

You are definitely on the right track.
aarondale
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Joined: Sun Jun 18, 2017 12:42 pm

Re: Lincoln Town Car - Complete replacement, how to clean?

Postby aarondale » Sun Jun 18, 2017 3:49 pm

Considering I replaced the evaporator when I replaced the OT, then your opinion gives me enough confidence that if the OT screen is intact, I won't be worried in the least about the condition of my evap passages.

Since all of the other hoses (minus the one with the muffler, as that is being replaced) were present whenever the last compressor(s) failed, are they still able to be cleaned to an acceptable level?

Can somebody post a picture of what flushing a hose would look like? I guess this is something I can do myself.

So replace high-side hose with muffler, then flush the other three hoses, replace all components with OEM parts except the evap. and I should be golden?

Any tips for removing a really stubborn OT? When I replaced the old one the sumb**** was well lodged in there. The end that the tool grabs onto snapped off and I just threw the evaporator out as it was.
aarondale
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Joined: Sun Jun 18, 2017 12:42 pm

Re: Lincoln Town Car - Complete replacement, how to clean?

Postby aarondale » Thu Jun 22, 2017 2:02 pm

Bump. All of the parts I mentioned are in.

Can anybody answer my last post before I get started, I want to get this right the first time.
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bohica2xo
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Re: Lincoln Town Car - Complete replacement, how to clean?

Postby bohica2xo » Fri Jun 23, 2017 5:54 am

Flushing a hose is simple with it removed. Pour some mineral spirits in it holding it in a "U" so it stays put. Hold a thumb over each end & shake violently. Dump the solvent in to a clean container & inspect the solvent for debris. Repeat if necessary. Blow dry air through it until you can't smell solvent with the end of the hose close to your nose.

Stuck orifice tubes are easy to remove with a long drywall screw.
aarondale
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Joined: Sun Jun 18, 2017 12:42 pm

Re: Lincoln Town Car - Complete replacement, how to clean?

Postby aarondale » Fri Jun 23, 2017 9:52 pm

Alright, that gives me a lot of confidence to start. I'll let everybody know how it goes.

Thanks!!

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