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Topic: Boost issue and Cat 3126 parts (Read 5042 times) previous topic - next topic

Re: Boost issue and Cat 3126 parts

Reply #20 –
Quote from: wolfe10 –
Two things:

Call the Caterpillar RV Hotline with your engine serial number.  They can tell you how much boost you engine SHOULD make. 877 777-3126.

Check for exhaust leaks which would reduce max boost: head to exhaust manifold, manifold itself and manifold to turbo.  Just look for any signs of soot/black.



Thanks Wolfe10
Yup, finally had time to look. Appears to be leaking for sure at manifold to block. You can see it spit raw fuel out when cold. Possibly the turbo to manifold is also leaking.
Going to clean the engine all up, we are going to pull the manifold with the turbo attached, and go through it all. Probably replace the Waste Gate solenoid also.May have manifold re-surfaced
Cheers

Re: Boost issue and Cat 3126 parts

Reply #21 –
You've got a hot rod CAT, do you have a boost/pyrometer on board?

Re: Boost issue and Cat 3126 parts

Reply #23 –
Update........ Got her apart. Blown exhaust gasket in 2 places. Also a small leak at the waste gate, but on the discharge side.
Turbo is fine, small side play. Going to see about getting it freshened local. going to send the manifold to my guy, have it surfaced.
We tested the Waste gate solenoid, it was fine. Waste gate is closing good too.
The Cat 800 number was really nice.Found lots out about our engine when it was on the dyno.
Cheers

Re: Boost issue and Cat 3126 parts

Reply #24 –
If the intake and exhaust halves are good consider getting a reman turbo cartridge,would be cheaper then a whole turbo.

Re: Boost issue and Cat 3126 parts

Reply #25 –
Quote from: gracerace –
Update........ Got her apart. Blown exhaust gasket in 2 places. Also a small leak at the waste gate, but on the discharge side.
Turbo is fine, small side play. Going to see about getting it freshened local. going to send the manifold to my guy, have it surfaced.
We tested the Waste gate solenoid, it was fine. Waste gate is closing good too.
The Cat 800 number was really nice.Found lots out about our engine when it was on the dyno.
Cheers
Not sure what you mean by side play. If you hold the shaft on both exhaust and intake and try to rock it perpendicular to the shaft it should not have play. But going left to right a little play is normal. They have bushings not bearings. I have rebuilt many as they are not very complicated.

Re: Boost issue and Cat 3126 parts

Reply #26 –
Quote from: craneman –
Not sure what you mean by side play. If you hold the shaft on both exhaust and intake and try to rock it perpendicular to the shaft it should not have play. But going left to right a little play is normal. They have bushings not bearings. I have rebuilt many as they are not very complicated.

Thanks, minor perpendicular and side to side,very minor,

Re: Boost issue and Cat 3126 parts

Reply #27 –
Update again...
Took the turbo in for freshening. There were cracks around the waste gate valves. Getting a refurbished one from Cat complete with solenoid, waste gate and turbo.
So the code the Silver leaf threw, wasn't lying (low boost) the code said check waste gate solenoid. therefore this would be the same symptom (waste gate slightly open).So it wasn't just the exhaust gasket leak.
Had the manifold resurfaced
Got all the gaskets/bolts coming.
She'll be right now M8's
Cheers

Re: Boost issue and Cat 3126 parts

Reply #28 –
                                                             * UPDATE*
Our Kitty Cat is purring. Picked up at least 2 MPG.  Boost back close to factory spec's.
Did the full service on everything, plus a little detail work on the engine and Gen set.
I have a sickness, if it has an engine, it deserves to be detailed.... I should have polished the turbo..... :D
Engine pic is with turbo pipe still off.

Re: Boost issue and Cat 3126 parts

Reply #29 –
Is cleaner then mine and I have the same sickness,only thing I would do different is next change get a cat oil filter instead of
that baldwin,they are worth the price difference.

Re: Boost issue and Cat 3126 parts

Reply #30 –
Quote from: John44 –
Is cleaner then mine and I have the same sickness,only thing I would do different is next change get a cat oil filter instead of
that baldwin,they are worth the price difference.
Thanks for the compliment. I was always told when I was a tech,Baldwins are the best, so I changed them all to Baldwins. I guess everyone has preferences.

Re: Boost issue and Cat 3126 parts

Reply #31 –
Quote from: gracerace –
                                                              * UPDATE*
Our Kitty Cat is purring. Picked up at least 2 MPG.  Boost back close to factory spec's.
Did the full service on everything, plus a little detail work on the engine and Gen set.
I have a sickness, if it has an engine, it deserves to be detailed.... I should have polished the turbo..... :D
Engine pic is with turbo pipe still off.
Just curious what are the two hoses with banjo fittings that appear to connect to the insanely small tubing that appears to connect to the intake manifold. BTW That engine is cleaner than a dinner plate that I will eat off of. LOL. Oh yeah you you left a rag, below the alternator.

Re: Boost issue and Cat 3126 parts

Reply #32 –
Quote from: Old phart phred –
Just curious what are the two hoses with banjo fittings that appear to connect to the insanely small tubing that appears to connect to the intake manifold. BTW That engine is cleaner than a dinner plate that I will eat off of. LOL. Oh yeah you you left a rag, below the alternator.

Oh crud, that is why it is so sluggish. That darn rag. LOL...That was in the exhaust tube when I had the Turbo off.
Yup, that is the intake tubes from the charge cooler to the intake.It splits at the charge cooler with a Y hose, then two pipes to the intake. I am sure Cat had a reason for that.
Thanks for the compliment. I hate working on greasy stuff.
CW

Re: Boost issue and Cat 3126 parts

Reply #33 –
I cover the tube with a toque, hard to leave a rag in then. Of course most of you will have to look up what a toque is.

Re: Boost issue and Cat 3126 parts

Reply #34 –
I thought you just spelled torque wrong!!

Re: Boost issue and Cat 3126 parts

Reply #35 –
Eh, I think is the proper response IRC. I live in KS, and not the great white North. Blast from the past, as I recall Bob & Doug Mackenzie I think, 12 days of Christmas tune, and irc a movie called strange Brew. LOL. Thanks for the memory.

Re: Boost issue and Cat 3126 parts

Reply #36 –
Quote from: Old phart phred –
Eh, I think is the proper response IRC. I live in KS, and not the great white North. Blast from the past, as I recall Bob & Doug Mackenzie I think, 12 days of Christmas tune, and irc a movie called strange Brew. LOL. Thanks for the memory.

LOL