95 U240 Engine Removal

Topic: 95 U240 Engine Removal (Read 3763 times) previous topic - next topic

Re: 95 U240 Engine Removal

Reply #100 – October 07, 2016, 02:53:30 pm

Am I missing something? Since it's the same lash-up as we have , I'm interested in what happened. AND, since so many members offered help, I'd be thinking a note from the OP on what the deal was, would be appropriate, to say the least! End of rant.

Re: 95 U240 Engine Removal

Reply #101 – October 07, 2016, 08:37:04 pm

Quote from: mike leary – October 07, 2016, 02:53:30 pm

Am I missing something? Since it's the same lash-up as we have , I'm interested in what happened. AND, since so many members offered help, I'd be thinking a note from the OP on what the deal was, would be appropriate, to say the least! End of rant.

Evening Mike,
Things have been moving slow for me, but today they got the head off. The pics are not good. Cylinders 1, 2, 3 all look good, but 4,5,6 have been burning oil, and on number six you can see some scoring. The other two look good.

I am not sure of the schedule, but now remove the pistons, rods, and crank. The in-frame cylinder boring will be done by a guy in pasadena, tx(porta-bore machine). Then put it back together with new oil pump and rebuild of my head.

Sounds good to me. More to come.

Pat,

Re: 95 U240 Engine Removal

Reply #102 – October 07, 2016, 09:01:41 pm

Pat,

Thanks for the update. Suspect it will be quite a lot less $$ than a new engine and moving all the accessories.

Any idea what caused such severe scoring-- unusual for any engine?

Re: 95 U240 Engine Removal

Reply #103 – October 07, 2016, 09:53:33 pm

wolfe,
The only thing I have done to abuse the engine is a couple of years ago on the way from Lufkin,tx to myrtle beach. The buzzers went off(engine temp and tranny temp). There was a few hills in a row. I pulled over and it cooled down and I went on. I still would like to know what happened on the way home in July. I don't think the scoring can cause 3 qts/100 miles oil consumption. They are looking at the head.

Pat,

Re: 95 U240 Engine Removal

Reply #104 – October 07, 2016, 11:53:37 pm

Bore gauge the cylinders.

Re: 95 U240 Engine Removal

Reply #105 – October 08, 2016, 09:47:20 am

I am doing a in-frame overhaul, bore cylinders and install new sleeves(all 6 back to standard), rods, mains, rebuild my head. I am still unsure of what is causing the oil consumption. The scoring on the cylinder 6 does not seam bad to me and I see no scoring on 4 & 5. What happened to make the big change in oil consumption, going from 1qt./100miles to 3qt./100miles? I can't see it!!

Pat,

Re: 95 U240 Engine Removal

Reply #106 – October 08, 2016, 09:57:16 am

I take side of the head was dry no oil correct? No sign of head gasket leakage? Could be a head issue.

Re: 95 U240 Engine Removal

Reply #107 – October 08, 2016, 11:03:24 am

While you have it off/loose, I would check exhaust manifold for any warpage and likely surface it.

Re: 95 U240 Engine Removal

Reply #108 – October 08, 2016, 11:15:55 am

What I can tell from all the posts is,assuming the engine was put together correctly to begin with (last overhaul),is that the overheating caused the problem,unless the head rebuilder finds something.

Re: 95 U240 Engine Removal

Reply #109 – October 08, 2016, 11:34:03 am

I like the sleeve install.

Re: 95 U240 Engine Removal

Reply #110 – October 08, 2016, 11:43:26 am

While this puppy was still running did you check the crankcase pressure? strange things happen when there is excessive pressure there.

Re: 95 U240 Engine Removal

Reply #111 – October 08, 2016, 12:05:10 pm

When you get the pistons out you may find the rings are shot, that is probably what cause your oil consumption going up. The scoring could be caused by broken rings.

Re: 95 U240 Engine Removal

Reply #112 – October 08, 2016, 12:21:54 pm

Looking at your pictures it looks like to me that they are wet liners which means they are removable. I thought all Cat engines had wet liners except the 3208 engine. Good luck with it.

Re: 95 U240 Engine Removal

Reply #113 – October 08, 2016, 12:31:34 pm

No, the Caterpillar 3116 is a parent bore, not linered engine. But as is being discussed here, it can be bored and liners installed aftermarket as a repair.

Re: 95 U240 Engine Removal

Reply #114 – October 08, 2016, 01:20:09 pm

Thanks, Pat. We're all sitting around the campfire rooting for you!

I can see the scoring, the jugs and the tops of the pistons should be clean enough to eat off of. Sometimes, a "hone" is all that's needed to clean it up, plus fresh rings. You're that far, so have the rod & main bearings measured. Have a "qualified" shop check the head before you get too carried away, prolly time for a valve adjustment, anyway. You're torn down, have the pump checked and adjusted for a turbo, as well as the injectors being cleaned/replaced. I know, you'll all laugh, but that turbo still sticks in my craw, as long as CBs are going out the window, have an outlet at least check the seals, were it me, I'd throw a fresh turbo in. Whew! Crap happens, but you are going to have a fresh engine to brag about!

Re: 95 U240 Engine Removal

Reply #115 – October 11, 2016, 11:47:09 am

Update from mechanic,
The head is off and on the way to rebuild shop. No problems found with it.

The mechanic is waiting on machine shop to measure the cylinders. He has access to aftermarket pistons that are .020 & .030 oversize which would be less costly due to not having to bore and sleeve the engine. When the oversize is know then he can take pictures and send all info to the boring machine co. and schedule the boring. At that same time order the parts and finish the disassembly. Crankshaft will no be removed, the main bearings will be rolled into place one or two at a time. More as it happens.

Thanks for all your help and information.
Pat,

Re: 95 U240 Engine Removal

Reply #116 – October 11, 2016, 12:33:34 pm

I would not use aftermarket pistons. Genuine cat is the only way I would go. All the reputable shops agree.

read their stance on parts:
CAT Engines | Caterpillar Engines For Sale Worldwide | Diesel Engines

Re: 95 U240 Engine Removal

Reply #117 – October 11, 2016, 12:37:52 pm

Sleeve the motor IMO. May help correct the weak cylinders that are probably out of round and tapered

Re: 95 U240 Engine Removal

Reply #118 – October 11, 2016, 12:47:47 pm

Pat,

I agree with you/your mechanic. If you can have it bored to use Caterpillar Corp oversized pistons, that is exactly what I would do. Do all 6. As suggested, mic all the cylinders to make sure that .020 or .030 will clean them up.

If not, then bore and fit sleeves in the damaged holes and go back with standard pistons.

Re: 95 U240 Engine Removal

Reply #119 – October 11, 2016, 01:04:11 pm

The engine seems to have cylinder roundness retention issues.

Boring the cylinders out oversize may add to this issue IMO.

Adding a sleeve might improve the original design would be my thoughts

Versus 80-100k life?

Especially if all the cylinders bore gauge out of round and/or tapered.

Old ford flatheads had 18month aged blocks prior to machining them as they stopped moving dimensionally wise after the seasoning

The yacht guys pushed the design with large failure rates.

Needs the design helped I feel.

Re: 95 U240 Engine Removal

Reply #120 – October 11, 2016, 01:14:44 pm

Quote from: Caflashbob – October 11, 2016, 01:04:11 pm

Needs the design helped I feel.

Agree in the very high HP/high RPM marine world.

Making 350 HP much of the time is VERY different than making 250 HP very occasionally!

Re: 95 U240 Engine Removal

Reply #121 – October 11, 2016, 01:24:58 pm

If Brett and the person giving the warranty both agree, good enough for me!! Good luck with this journey. So many coaches on the road, and so relatively you engine for transmission issues. It is so unfortunate an issue strikes.

Re: 95 U240 Engine Removal

Reply #122 – October 11, 2016, 01:27:56 pm

Quote from: Tim Fiedler – October 11, 2016, 01:24:58 pm

If Brett and the person giving the warranty both agree, good enough for me!! Good luck with this journey. So many coaches on the road, and so relatively you engine for transmission issues. It is so unfortunate an issue strikes.

X-2 in spades! I'd forgotten about them throwing the blocks out in the weather to "season", those days are waay gone!

Re: 95 U240 Engine Removal

Reply #123 – October 11, 2016, 02:24:45 pm

Unquestionably, a block (or exhaust manifold for that matter) that has gone through a number of heat cycles and is then machined is MUCH less likely to get out of spec than a new one.

Re: 95 U240 Engine Removal

Reply #124 – October 11, 2016, 06:10:50 pm

Hence my suggestion to redo a seasoned failed block with a more substantial replacement liner.

Done a hundred plus dirt bike motors thst way. Steel liner in a aluminum cylinder. Not iron. Cro moly la sleeve spun cast sleeve.

My favorite 45 year machine shop would have the bare block.

I understand the expensive process.

But I like to fix things permanently.

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