Compressor Questions

[clayc]

‘13 250 ProXS.. decided to run compression and leak down.. compression was 120-124 and leak down was 1-2%. Decided to turn compressor pulley. Well, it has a rattle and a very rough spot at top of compression stroke. (Would post video if I knew how) Engine is running good, but I’m sure compressor it’s on its last leg.

1) where’s a good place to look for a reasonable priced compressor (if there is such a thing)
2) even though compressor hasn’t failed, should injectors and rails be cleaned? Is this something I can do? (I’m a pretty decent mechanic)

and I plan on doing the work myself except priming the lines. And I will replace the small oil filters while I’m at it.

[Jtreed99]

No problem for you to replace compressor and clean rails yourself. Only way to feel good about whether or not metal made it past the rings to air side is if you disassemble compressor. You’ll need specialized equipment that you don’t have to flow test the injectors. My guess is you will find the rod end bearing failed and the crank journal chewed up with a lot of metal in the bottom of the compressor and the little in line filters full.

[clayc]

No problem for you to replace compressor and clean rails yourself. Only way to feel good about whether or not metal made it past the rings to air side is if you disassemble compressor. You’ll need specialized equipment that you don’t have to flow test the injectors. My guess is you will find the rod end bearing failed and the crank journal chewed up with a lot of metal in the bottom of the compressor and the little in line filters full.

I plan on pulling it apart today. I suspect the rod bearing as well. If the bore isn’t chewed up, do you think any metal made its way into the air system? (Compressor was building good air pressure)

[bass.man65]

I have a brand new compressor for sale in the parts for sale section and also have a 2 year old one with 20 hrs I would sell..

[clayc]

Update: Removed and opened compressor…. Only problem I found was the roller bearings in the connecting rod are shot. They are rough.. there was a little bit of glitter (metal) in there. Rod journal on crankshaft is shot too.

[DewRonInc]

Might get parts for it I have rebuilt one but we have all needed stuff to do. Filters going to crank MUST BE CHANGED, oil is scavenged from compressor for upper and lower crank bearing, oil prime must be done after

[OhioAngler]

I have a brand new compressor for sale in the parts for sale section and also have a 2 year old one with 20 hrs I would sell..

sent you a PM on the compressors

[bhjr.]

Mine did the same thing to the point of knocking. No metal in the top. Had the compressor changed, filters changed, oil prime performed, and knock on wood, has performed flawlessly since. I've got 556 hours on it now,failure was at 200 plus hours.

[tomloans]

After all the excitement, don't forget to change filters and DON'T FORGET TO PRIME THE OIL. You will need an after market tool to do this or you will need to take it in to merc shop so they can do it. It takes about 15 minutes max but very hard to get in to the dealers to get it done.

[SilverFox579]

After all the excitement, don't forget to change filters and DON'T FORGET TO PRIME THE OIL. You will need an after market tool to do this or you will need to take it in to merc shop so they can do it. It takes about 15 minutes max but very hard to get in to the dealers to get it done.

^^^^

Ignore ANY recommendation to do the "jockey shifter thing" in lieu of an oil pump prime sequence as doing so will put your engine back in break in mode which will double oil for 2hrs and likely cost you a set of spark plugs.

[JOE54]

^^^^^+1

[clayc]

^^^^

Ignore ANY recommendation to do the "jockey shifter thing" in lieu of an oil pump prime sequence as doing so will put your engine back in break in mode which will double oil for 2hrs and likely cost you a set of spark plugs.

Thanks for the input. I was planning on changing all the oil filters and flushing the oil lines from compressor to main bearing, etc. Putting engine back to break-in (via shifter) is ridiculous, not doing that. (Doubling oil and cost of plugs, nope)… I know dealers can plug in and prime system (did it after replacing oil pump), but someone mentioned a “tool” to do it. If anyone knows what the “tool” is, please explain and where to get one.

Also, anyone know where to buy a compressor?

TIA,

Clay

[Double Trouble]

Diacom diagnostic software

[clayc]

Diacom diagnostic software

Probably a bit expensive just to prime a pump

[EuropeanAM]

Did you take a look at Rhonda's post, pinned at the top of the Forum, and drop her an email for assistance with Parts and Accessories?

Also- if there has been ANY metal fragmentation, odds are very high that it has indeed passed into the air side of the fuel system.

Despite the above comments- I do NOT recommend fuel rail servicing as a DIY project, unless you have an OEM manual, and the correct tool to disassemble the regulators.

[clayc]

Did you take a look at Rhonda's post, pinned at the top of the Forum, and drop her an email for assistance with Parts and Accessories?

Also- if there has been ANY metal fragmentation, odds are very high that it has indeed passed into the air side of the fuel system.

Despite the above comments- I do NOT recommend fuel rail servicing as a DIY project, unless you have an OEM manual, and the correct tool to disassemble the regulators.

yes, she has emailed me back.. thanks

[Bob G.]

Probably a bit expensive just to prime a pump

Yes, a little expense for performing a single function but can be used for more than an oil pump prime. I hook mine up every time I run my motor on the muffs to monitor all parameters including port, starboard and compressor temps.

[SilverFox579]

Probably a bit expensive just to prime a pump

If you think an hour's labor is a lot then ~$600 for the software is insanely expensive. Yes, the software IS nice to have, but I haven't yet gotten to the point where it would pay for itself.

[EuropeanAM]

I've seen several who bought the software, and offer to help out their friends/buddies for a nominal fee (monetary or frosty beverages).

[Bob G.]

The hardest part of using the Diacom software is getting my cowling off. At 6’ 2”, the cowling on my motor is as tall as me when the motor is straight up and down.