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02-06-2012, 11:41 PM | #1 |
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To Babbit or Not To Babbit vs Inserted??
Well folks looking into a NEW Engine, Not a rebuild, Getting a stipe touring cam, counter balanced crank, High Compression head. The question is weather to go with inserted bearing or Babbit.. Looking at 2 different scenarios and have heard many different opinions. I drive the car daily between 45-55 mph for about 35-45 min intervals at a stretch, to work and back. Drive in the cold or heat and all flat lands, no hilly areas in the midwest I have heard so many mind sets.. Babbit is softer like the crank, babbit will last 50K easy, babbit was what henry used and it workd, inserted will last forever. , inserted is the best and strongest....etc..>Now i a asking for some simple opinions here. What say many of you please
Thanks in advance....
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Mark Maron Ill., Region MARC & MAFCA MARC JSC Member MAFFI Trustee National Facebook Admin. https://www.facebook.com/groups/MARC.group/ A7191-Sport Coupe 29 Roadster 29-Town Sedan 29-Original Special Coupe |
02-07-2012, 12:00 AM | #2 |
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Re: To Babbit or Not To Babbit vs Inserted??
Keep in mind that I am still a nubie here but I would not hesitate to go with inserts. Much stronger, durable and much, much easier down the road to do a futrue repair on. I have a 39 chevy that I am restoring and will be going with inserts. Inserts are what henry would have used if they had been available. It was his way, simple, strong and long lasting.
Thats my two cents. Let us know what you decide. |
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02-07-2012, 12:43 AM | #3 | |
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Re: To Babbit or Not To Babbit vs Inserted??
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02-07-2012, 06:11 AM | #4 |
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Re: To Babbit or Not To Babbit vs Inserted??
Inserted wont last forever, it is just like any other bearing, it depends on the care and maintenance it receives.
I don't know where you can get a motor with inserts cheaper than babbitt. Inserts cost more because there is more work and machining involved. I agree that down the road the inserted motor is less cost since you don't have to find someone to pour babbitt. The inserted motor is just like any modern motor and can be repaired by any competent mechanic or shop. |
02-07-2012, 06:25 AM | #5 |
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Re: To Babbit or Not To Babbit vs Inserted??
If more folks don't pick up the babbit torch....we'll have no choice but insert.
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02-07-2012, 06:33 AM | #6 |
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Re: To Babbit or Not To Babbit vs Inserted??
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You are close to Rich over in Skokie, He is straight up and can answer any questions and concerns. Here's his stuff from his site; STORE HOURS Monday thru Friday 8:00am to 4:30 pm Saturday 8:00am to12:00pm ANTIQUE ENGINE REBUILDING 4835 LOUISE SKOKIE, IL 60077 847 674 6716 INQUIRES INVITED |
02-07-2012, 07:44 AM | #7 | |
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Re: To Babbit or Not To Babbit vs Inserted??
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With all due respect to Glenn and everyone concerned, Rich does not do babbitt, ....and is the manufacturer of aftermarket inserts and inserted rods, so in my mind his opinion would already be swayed towards inserts only. Maybe his opinion would be satisfactory anyway?? Second, Mark when you say you are looking into a new engine, are we speaking of Terry Burtz's "new" engine, a Donovan Model 'D' engine, or a NOS Model 'A' block? My personal opinion (and what I tell my customers) is that alot of this depends totally on whether the engine will have a counterweighted crankshaft, ...and whether the engine owner has the ability to do his own mechanic work, --namely adjusting the bearing clearances. If the engine has a new Burlington crankshaft or an adequately counterweighted crankshaft, my experiences are that you cannot remove the rear main cap with the engine still in place. Therefore if the owner must pay for someone to remove the engine to adjust the babbitt clearances, then IMHO it is worth paying the upgrade for inserts simply because of the thinner layer of soft metal (babbitt) on the insert shell. The second side of this is how the babbitt is poured. Is it burnished during the rebuild? I know there are folks that disagree with this task however it speaks of this operation at the factory and suggests that this was to be done by the rebuilder, thus I feel it is an important step in longetivity. If the crankshaft is undersized, the poured babbitt is thicker. If a large stack of shims is placed under the cap, then the babbitt is thicker by even more so. This is not good because the cap can walk and the soft metal (babbitt) is easily repositioned. If either one of these happens, then the effective life is shortened. Also, much depends on how the crankshaft has been machined. Inserts can mask a poorly machined crankshaft better than thick babbitt can. I could go on and write a complete dissertation but I guess it all boils down to the initial comment about who is doing the rebuilding and which crankshaft you choose to use. . |
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02-07-2012, 08:15 AM | #8 |
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Re: To Babbit or Not To Babbit vs Inserted??
Some facts:
Either type of bearing works great lasts a long time- IF they are done right. A lot of engines are not done right. If you have a babbitt failure it will fail slow and you might get many miles in a bad state. The crank and block are not likely to get damaged. You just rebabbitt and go. Inserts tend to fail catastrophically and you will need to be towed home. The block and crank are more likely to be damaged and the block may not be repairable. Now for some other thoughts. The engine needs to be balanced. I am sure you have read my other posts by now. One area that is difficult is finding properly babbitted rods that are tightly matched in weight. Getting a set of all new rods set up for inserts would take care of this problem. Then use the babbitt on the block done by a shop that has a clue. I would point you to talk to Herm and J&M Machine. They know what they are doing and have the tooling to do the job right. Call them and ask them what they think you should do. I think you will learn quite a bit. |
02-07-2012, 09:15 AM | #9 |
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Re: To Babbit or Not To Babbit vs Inserted??
FYI, Rich has many years and experience doing babbitt, that's all he use to do. There are many of his babbitted mills running around the Milcago and the Chiwaukee area. I didn't know he went straight insert, I guess I should take my own advice a pay him a visit and find out why.
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02-07-2012, 09:24 AM | #10 |
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Re: To Babbit or Not To Babbit vs Inserted??
I wish I could help on your bearing type comparisons, but I CAN tell you I have about 3000 very satisfactory miles on my Antique Engine Rebuilding's inserted bearings engine with high compression head, balanced crankshaft, oversize valves, and "Touring Cam" permitting me to do 60 mph on the highway whenever I please, and climb hills with a smooth sounding engine and a stock rear end.
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02-07-2012, 09:34 AM | #11 |
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Re: To Babbit or Not To Babbit vs Inserted??
Mark: Whicheverway you go (I'm thinking inserts) I would want to see it and the f/wheel p/plate BALANCED. JMO
Paul in CT |
02-07-2012, 09:44 AM | #12 |
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Re: To Babbit or Not To Babbit vs Inserted??
inserted bearings are the way to go
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02-07-2012, 10:08 AM | #13 |
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Re: To Babbit or Not To Babbit vs Inserted??
I have the KRW setup for Model A's, I have done quite a few engines all are still on the road. I use the KRW line boring bar to within .010 of the crank, take it to the local machine shop to have him set the thrust and finish the line bore. When I get the block back to the shop I clean it tighten the mains and do as Henry said "lube the mains with light machine oil and spin until it smokes freely" I don't spin it until it smokes but it gets prety hot. I use plastigage, then assemble the engine, I garuntee (sp?) the job for one year but only if it was balanced dynamicaly by my machine shop. At 5000 miles I have taken down a couple of mine, checked the clearance, in one engine I took out 1 shim on the rear main. Some day I will try the inserts, but it isn't cost effective for me at this time. I think babbitt is very good done correctly -- I don't think anyone does it like Henry. Regards, E LaBrash
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02-07-2012, 10:20 AM | #14 |
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Re: To Babbit or Not To Babbit vs Inserted??
Jeff, it wasn't a true REBUILD, but more of a light overhaul to get by until a late 31 block was found and rebuilt.
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02-07-2012, 11:13 AM | #15 | |
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Re: To Babbit or Not To Babbit vs Inserted??
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02-07-2012, 01:46 PM | #16 | |
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Re: To Babbit or Not To Babbit vs Inserted??
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Last edited by Kohnke Rebabbitting; 02-07-2012 at 01:51 PM. |
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02-07-2012, 02:51 PM | #17 |
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Re: To Babbit or Not To Babbit vs Inserted??
Herm: Were those bearings pressurized? Because without pressure they are not going to be adequately lubricated.
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02-07-2012, 02:57 PM | #18 | |
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Re: PART 2 NOW>
Quote:
I drive about 5000+ Miles a year as mentioned. Brent.. I mean i want to make an outright purchase of an engine, NOT rebuild my 29 engine that i presently have. The reason i am in this position is this is what i have found in the oil return pipe. Pic 1 and 2 from the left. Now when this was found I first added a bottle of the powdered BARRS to seal the head gasket, that helped,. Then drained the oil, added motor flush 4 quarts of oil, and blew out the pan with air pressure. Drove yesterday for about 40 minutes and came home.. Checked all and THIS IS WHAT I FOUND. Pics 3 and 4,. Actually a white foamy build up in the oil pipe.. With that said and tested, my opinion is that i might have a cracked block.. this is the reason for the engine and NOT A rebuild...Your opinions please.
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Mark Maron Ill., Region MARC & MAFCA MARC JSC Member MAFFI Trustee National Facebook Admin. https://www.facebook.com/groups/MARC.group/ A7191-Sport Coupe 29 Roadster 29-Town Sedan 29-Original Special Coupe |
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02-07-2012, 02:57 PM | #19 |
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Re: To Babbit or Not To Babbit vs Inserted??
Herm that looks like sloppy job putting in those inserts. The rod bearing does not come close to covering the rod journal. The main inserts are off to one side, on the front and center one. probable would work, but I would not do it that way. It bet he did not clean it well either.
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02-07-2012, 03:13 PM | #20 | |
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Re: To Babbit or Not To Babbit vs Inserted??
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