Removing Stubborn Melted Aluminum off of Chrome Cylinders

[superboattwin250]

They use ni-com these days

[WillySteve]

Here's my feelings on cyl plating!
If yer spending big bucks....as in 1600 for Pistons/Rings/LW Pins plus Rod Bolts, Bearings, Gaskets, TIME, etc....why not spend 4-6 extra $ on a nick job vs. resleeving with steel and not hav'ta worry about sticking pistons!!!!
Besides, the way I drive I'm always Balls to the Wall without a proper warmup!!!
It's worked for 20 years on this one and 12 on the last before I sold it still running great!

[90 5.0]

Is it cheaper to have it re-chromed like it was or does no one use that process anymore and puts nic in instead?

is there any benifit one way or the other? Seems like all the old chrome bore fishing motors were dang near bullet proof.

[WillySteve]

Is it cheaper to have it re-chromed like it was or does no one use that process anymore and puts nic in instead?

is there any benifit one way or the other? Seems like all the old chrome bore fishing motors were dang near bullet proof.

The chrome bore was replaced with Nikasil by Mercury. They've used several through the years including Merkasil but all were about the same. I don't think they use Nik anymore nor the Merk used back in the 80's.
I'm not sure what they call it now, but like I said, it's all basically a chrome bore.

I've had 3 and would have to say they have all been bullet proof.
I don't know how many times I've cranked and ran on early morning tournaments in cold weather....the only seizure I've had was missing the big one!!!!
Also, tighter cyl clearances = a more efficient engine! IMO

[Magcat 62]

I HEARD to remove aluminun from a chrome bore 50/50 mix muriatic acid it will foam on the deposits then tooth brush w/ water. just what i heard somewhere.... ART

[Krazymaan]

Cant hurt, right. Its already practically wrecked.
I wonder if anyone has had success doing this. That's the bigger question

[90 5.0]

Cant hurt, right. Its already practically wrecked.
I wonder if anyone has had success doing this. That's the bigger question

I've done it on steel bores and know people that have done it on chrome.

Def check bore after before slapping a piston in there.

[nitro_rat]

I've done it on steel bores

My '79 175 has 4 original pistons and 2 replacement pistons. Yep, works on steel, I'd sure try it on chrome before doing a replate $$$!

[BUZZIN' DOZEN]

Your not gonna' replate that mess, it doesn't work like bondo on a beat up fender!
that hole will need a new sleeve, the plating is only like.006 thick.

[Umassot50]

Muriatic acid will remove the aluminum. Ide have it replated with nikasil. The stripper the plating companies use will take all that off anyway.

[Chaz]

Your not gonna' replate that mess, it doesn't work like bondo on a beat up fender!
that hole will need a new sleeve, the plating is only like.006 thick.

Buzzin , their only on page two .... much too soon for a reality check ..

Maybe that bondo with glass hairs would do a better job ..

[BUZZIN' DOZEN]

Buzzin , their only on page two .... much too soon for a reality check ..

Maybe that bondo with glass hairs would do a better job ..

I just sit here doing that "facepalm" thing.

[Krazymaan]

I agree the cylinder is probably shot, I'm going to mess with some acid and see what it takes to get the aluminum off anyways. You don't get this opportunity that often.
In the meantime I copied one of Chaz's flexible paper towel bore gage design and followed his process from another post just to double check for out of round. 3.375 right buddy?

[Chaz]

In the meantime I copied one of Chaz's flexible paper towel bore gage design and followed his process from another post just to double check for out of round. 3.375 right buddy?

Ozzy , how many times do I have to tell you ....
That's my "soft hone" . You can add sintered iron shaving from a brake lathe to remove that slag from your cyl wall's ...

As far as measuring .. a guy like you only need's one of them fake yeller stripe Mitutoyo calipers to lean over to say whatever number your lookin for ..

I see you have moved operations to your photo studio . All the recent players are there , roached block , bearing cap with retainer , recycled rod bearings , ring gear from a still stock flywheel , coil pack rigged to alert you whenever I post ...

[Krazymaan]

Cha Cha Chaz, You must have slept all night without having to wake up to go pee. That was almost pretty funny this time.