[littlestoney406]

Got a 2001 Western Star with 3406E CAT. Having to add about a gallon of antifreeze everyday and no leaks. I'm thinking either head gasket or cracked head. Anyone have any ideas?

[Maniac]

Sounds like it is internal, do an oil analysis ASAP if its in the oil pan you need to care care of it PRONTO, or risk losing the engine.

Could also be a cracked liner.

[littlestoney406]

I think that it has been doing this for maybe a week. It isn't my truck, but it's my girlfriends dad's. He hauls coal for himself and he doesn't want the downtime of it being in the shop a few days just for them to tell him what they think is wrong with it.

I'll let him know.

[brian]

wouldnt take long for a shop to diagnose it, if he has a shop that will get him in right away, and he can`t wait around on this the longer it goes the more damage gets done.

[littlestoney406]

That is true. He does most of the work himself, but something like that he was wanting to see if he could figure out the probably and maybe fix it himself without having to take it to the shop. He was asking me and head gasket or head was all that I could think of, but then again I'm still kinda learning heavy equipment stuff, I'm more of a car mechanic.

[brian]

do you or him have the tools to do a leak down test? a compression test may lead ya in the general direction but a leak down test will damn near pin point it.

[COLT]

Excuse the dumb question, Have you considered 1 gal low when cold is full when hot? I have seen this gallon aday ritual before. :wink:

[special k]

If money is tight and it is steadily losing anti-freeze you can use some Irontite in the rad. I don't use those kinds of things but I know some guys that have bought some time using it. Keep a close eye on the oil for antifreeze contamination and pay attention when you start it to see if it leaking into the cylinder usually you get lots of whitish smoke. When that starts to happen you're gonna have to fix it soon.

[KAIMIKAZEE]

i've got the same 3406e in my pete....

had the same problem a couple of months ago and it was a bad liner...

so decided to get a complete overhaul....

i too couldn't see any leaks and had to add a gallon every day.

comes out to be somewhere like $50-70 bucks a weeks just for antifreeze.

if your stacks are blowing bluish white smoke even after a long run than it's your liners, coolants getting internally into the oil

hope that helps..

[C3 Trucking]

It is most likely a bad liner seal. Pull off a valve cover & look under the cover. If you see green/gray jelly like goo that is the water/antifreeze boiled out of the oil. Pull pan & pressurized a full rad with a rad cap checker. cat has a real problem with the 3400 series liner seals. 4 or 5 O ring material changes, so far same problem. The C-15 which is really a 3406E with most of the problems solved now uses the same crevice seal at the bottom of the liner that Cummins has used for 30 years. the liners most likely to leak are #1 & #2. They all can leak. It may or may not take some time to see the water drops on the crank after you apply pressure to the rad. Don't use more than 13-14 lbs pressure. If you do an in-frame when you pull the liners check the block for pinholes in the seal areas. Very small & not many holes can be sealed with cat epoxy, Large or many holes the cat service truck will be happy to come out & bore & sleeve the block for $300.00 per hole. Secondary cause might be the oil cooler. If it is running good not likely the head gasket. If you pull the head timing pins will help a lot, 3/8" bolt will work if you are careful. If you wait to long the oil filter will plug & bypass showing low oil pressure. Change the filter, oil pressure comes back strong. water makes a poor lube & will start to eat the rod & main bearings. If you drain the oil & it comes out jello you are in big trouble. If you in-frame check the cam bearings if you do not replace the head. You and everyone who owns a 3400 series sooner or later. Hows that for a sucky answer