engine life
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Senior User
Joined: Nov 2002
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From: ca
engine life
some body was telling me that in order to make my engine laster i needed to take 3 steps.
first he told me to smooth out the cross hatching that was there after i bored my block, seems tio make sense,
next he told me that I needed to put some type of black goo i think it was some type of metal oxide all over my crankshaft and to heat it up to lik 500 degrees, he said that is what the japanese car makers do as well as racers, DOES ANYONE KNOW ANYTHING ABOUT THIS IT SEEMS A BIT ODD, BUT I WOULD LIKE TO KNOW IF IT WOULD WORK?
and third that I needed to take the casting flash off of my connecting rods, he said something about it keeping the rods from flinging oil, and he said it would add 5 horse power.
can someone please help me with these?
first he told me to smooth out the cross hatching that was there after i bored my block, seems tio make sense,
next he told me that I needed to put some type of black goo i think it was some type of metal oxide all over my crankshaft and to heat it up to lik 500 degrees, he said that is what the japanese car makers do as well as racers, DOES ANYONE KNOW ANYTHING ABOUT THIS IT SEEMS A BIT ODD, BUT I WOULD LIKE TO KNOW IF IT WOULD WORK?
and third that I needed to take the casting flash off of my connecting rods, he said something about it keeping the rods from flinging oil, and he said it would add 5 horse power.
can someone please help me with these?
Posting Guru
Joined: Aug 2000
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From: PacNW
engine life
I think he was talking about nitriding the crank but it doesn't sound like the typical nitriding process I've heard of. Nitriding does make the crank harder and more wear resistant.
The cross hatches are there to help seat the piston rings. Different rings require different degrees of crosshatching. Removing it will lengthen the break in process and could potentially prevent the rings from seating entirely.
Removing the casting flash from any cast component is a good idea because it reduces the possibility of cracking. If you do decide to polish the rods then do it before you have them balanced and make sure you do it the right way. I don't think it's worth 5 hp however.
The cross hatches are there to help seat the piston rings. Different rings require different degrees of crosshatching. Removing it will lengthen the break in process and could potentially prevent the rings from seating entirely.
Removing the casting flash from any cast component is a good idea because it reduces the possibility of cracking. If you do decide to polish the rods then do it before you have them balanced and make sure you do it the right way. I don't think it's worth 5 hp however.
Posting Guru
Joined: Aug 2000
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From: PacNW
engine life
There's a lot of them out there, nitriding, heat treating, cryogenics, etc. You might just want to type in "crankshaft treatment" into Google and check them out for yourself. (Ignore the stuff about scoliosis 
) The real questions are just how high do you plan to rev this engine and how much do want to spend?
) The real questions are just how high do you plan to rev this engine and how much do want to spend?
Posting Guru
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engine life
Could the cross hatch smoothing be after align boring/honing the mains. I can't imagine smooth cylinder walls.
You got me on the black goo. Sounds like that Marvel Mystery Oil or something. Have you heard of hard chroming?
Removing casting flash is likely "polishing the beams". It's very common for rod prep but doubt it's worth 5HP.
You got me on the black goo. Sounds like that Marvel Mystery Oil or something. Have you heard of hard chroming?
Removing casting flash is likely "polishing the beams". It's very common for rod prep but doubt it's worth 5HP.
Lead Driver
Joined: Nov 2000
Posts: 6,647
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From: Albuquerque
engine life
If you hang out here very long you should be able to give your friend some advice!
A "little" learing can be a dangerous thing!
You could start by telling him a little sugar in the gas tank of his rice burner raises the evergy content.
..
Not really of course.
A "little" learing can be a dangerous thing!
You could start by telling him a little sugar in the gas tank of his rice burner raises the evergy content.
.
. Not really of course.
Last edited by beartracks; Feb 14, 2003 at 09:16 AM.
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Joined: Nov 2002
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From: ca
engine life
he said it was molydeum sulfide not necessarily spelled that way, i think. he said they also use it on gun bullets to reduce wear and increase accuracy anyone know?
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From: Saraland AL
engine life
I know moly is used on bullets. All of the match shooters that I know who have used it say they haven't seen any difference in the moly coated bullets and regular bullets. It is a little cleaner in some rifle bores.
I can't see any benefit to using it on a crank though. A good polish job and good bearings and good oil is all you will need. Getting it all balanced won't hurt either.
I can't see any benefit to using it on a crank though. A good polish job and good bearings and good oil is all you will need. Getting it all balanced won't hurt either.
Posting Legend
Joined: Sep 2001
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engine life
I worked for a company that used hard chrome plated crankshaft journals as a remanufacturing technique. Maybe .020 minimum chrome although I have seen over .100 used. It was used on huge industrial engine crankshafts. They wore forever after that. I do not know of anybody that does it anymore but you could Google search.