rhasler

I think it should be the one on the bottom. I've seen the plunger on those gall. If the spring is weak it would let the valve relieve too soon.

Pull the pressure relief valve out of the filter housing and see if any of the parts are gummed up or rusted. Check for a damaged spring in the valve, galled areas on the plunger.

I didn't realize it, but these coupons are good for one gallon of gas at most retailers. I have seen them around, but until recently never took advantage of them, I never realized their actual worth. You probably have one or two just lying around somewhere, now is the time to use them before they lose their value, and it's too late!! SEE COUPON BELOW...

When the '07 engines came out we ordered something like 20 trucks and I think we ended up with 10-12 sitting for over a year. Hopefully the '10 engines hold up and sell a lot better!

If the pulley is 5 7/8" and it's on an AC engine then it's the wrong pump. Check back and see what part you were sold, the part number for the AC cartridge used to be 316GC3193. I don't know if the number has changed though. I just checked, same number still.

I was looking for that service alert and one about water pump cavitation yesterday but I couldn't find either of them. Cross eyed and painless, but here's the bulletin in the one piece tank. SB 232-026 Pushing Coolant from Recovery Bottle.pdf

Here's another one.

My carrier chart, which is kind of old, shows the fastest ratio at 3.65, the slowest at 9.15. The only one in the 8's is 8.24

Congratulations Grandpappy Rob, now's you're chance to make that boy of yours pay for his upbringing!

That should be the differential ratio.

The one piece tank has an overflow fitting soldered into the filler neck.

I think I was a little unclear regarding the engines, here's a little more information. A CH, CX, CHN, or CXN chassis with an engine built after 2002 will have an AC engine, easily identified by an external EGR valve on the exhaust manifold and a VGT turbo. A CV, LE, MR, or RB chassis with an engine built after 2002 will have an AI or AMI. These engines have no EGR valve and have a standard turbo. The AI and AMI originally had the same front design (old style water pump) as the earlier E-Tech enignes, but later adopted the same front end (except for LE, possibly MR) sometime around 2004. I would look into changing the coolant reservoir to the one piece metal tank.

AC is ASET cooled EGR, AI/AMI is internal EGR. The ASET engines were designated as either AC (highway usage) or AI/AMI (vocational usage). Both engines have EGR. The AC has a "selective" system that allows the engine ecu to increase and decrease EGR as needed through control of an EGR valve. The AI/AMI on the other hand inducts EGR gas on every stroke due to an extra bump on the cam lobe.

Here are a couple of things you might check. If you have a two piece reservoir arrangement replace it with the one piece metal tank. If the cooling system is not updated with the parts in the bulletin I would install them. The water pump cartridge may be sucking air or the water pump housing (big aluminum housing that the cartridge is bolted into) may be cavitated, this will cause your problem. Measure the OD of the pulley on the water pump cartridge. The AC cartridge has a 5 1/4" pulley, the AI uses a 5 7/8" pulley. Installing the AI pump cartridge will cause 10% higher coolant temperatures.

Happy birthday Superdog, here's hoping that parts are plentiful for all your projects!

Mark, that should read "towed it right out the back door". Gotta love that custom one piece windscreen though!

DPF, we don't need no steenking DPF! Those Euro III and IV emission MP8 engines are pretty neat, way cleaner than what we're used to, kind of like the '04 MP7. Don't know if they've had injector cup problems with them.

Man, how did they ever get him to pose for that? I mean really, didn't he have any kind of concern about the impact it would have on his public image?

Coitainly, nyuck nyuck! SB 215-025 Cooling System Revisions (November 4, 2008).pdf

I've read that the cab is cramped, too high, has poor visibility, and that the interior is similar to a cheapened Kenworth. I also read it won't be available as an axle forward until 2012-2013.

Check the screen in the lower radiator pipe leading to the oil cooler.

Welcome to the Monkey House-Kurt Vonnegut Jr.

Make sure the freon high pressure switch is plugged into the sensor and that the sensor is not stuck.

Doe it comes with a nice Panasonic Toughbook too?

What you are referring to will transmit power to the wheel on each axle with the least resistance and would be on a Mack differential without the air lockout on the power divider. The differential with the air lockout does the same thing, transmit power to the wheel on each axle with the least resistance, but does it at the flip of a switch. Both versions are an inter-axle power divider. The new 150 series differentials also have an available inter-wheel lock which divides power equally among all four wheels (when both switches are turned on).