Quote:
Originally Posted by neilschelly
I have my stock Denso in essentially unknown condition. It's possible my stock Denso works awesome, but it definitely hasn't had good refrigerant flow for probably at least 10 years. Is it possible to bench test the compressor without actually trying to charge up the system with it? If not, is there a way to service it and be reasonably sure it will run well? Or should I just sick with the Sanden that is nearly brand new and is at least a known quantity?
-N
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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.