Pelican Parts Forums - Good source for R12 R134 conversion fittings?

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Quote:

Originally Posted by kuehl (Post 8159463)

If you are happy with your Sanden 507 performance in your system, some people need more flow, then stick with it. We usually put 507's pre-Carrera's or early turbo's,
because of ease of installation and costs, and stick with Denso on OE Denso models.

Our preference is to tear down the Denso and inspect the:
1) Bores
2) Pistons
3) Wobble Plate
4) Shaft area where nose seal contacts

Any of 1 through 4 NG then toss it.

4) Reed valve assemblies (you can swap with other like donor compressors)
5) Bearings (seldom go bad however if they are bad the typically you toss the whole compressor).
6) Clutch assembly (you can swap with other good units so long as you properly shim the air gap); if you got a worn pulley bearing then either the unit has high miles or it overheated, if you have a coil with cracked epoxy then ditto.. it overheated.

If the Denso internals are good then you just need a seal kit.

To "bench test" you need typically 5 hp to drive it or more, pressure gauges, and so forth, however a good bench test does not guarantee good internals:
alike someone taking an exercise electrocardiogram, passing and they fall on their face outside the lab.

That sounds a lot like I should leave well enough alone and sell the compressor as-is to someone who might be more qualified to inspect and decide if it's worth keeping.
-N

With the compressor off the car, it takes between 10 minutes to 60 minutes to take one apart. It all depends upon whether you have all your tools lined up and how many of these procedures you have under your belt. PP has a link to a summarized tear down Here.

From our experience of tearing down over 500 Denso 10P15 series compressors over the past 15+ years, when we have a unit past the 80K miles marker we see wear issues with pistons and bores, over 100k miles its wobble plate and piston half bearings.
It is not economical to jig bore or jig grind a set of cylinders (they are aluminum bores and do not have steel liners) and match up new pistons (which don't have rings). When wobble plates wear you toss them away with the shaft since they are a fixed unit.
So before you buy a seal kit you inspect the unit first before putting out the money.
If things look questionable or not economical then buy a new Denso, and move on to the next project.