hereismylife
Active member
I see the 3 are not shiney like the other 2. I am trying to figure out if you can use them or not?
Mac
Member
The shiny cylinders look like they were honed. Even the outside of the cylinders look cleaned or blasted. The dark bores you can see where the rings come close to top of cylinders they appear not honed. Put your pistons in the bore and check clearance.
---mac--
---mac--
A couple of bucks
VIP Member
The black that remains possibly indicates previous Muratic acid usage.
hereismylife
Active member
I cleaned the outside with a wire brush. The 3 were honed.
I am just wondering if the 3 still need to be renickled. They are not chrome looking like the other 2.
I will get more pics tonight.
I am just wondering if the 3 still need to be renickled. They are not chrome looking like the other 2.
I will get more pics tonight.
Mac
Member
Where did you get the three honed cylinders? Did you hone them yourself? And why do you think the Nikasil is no good?
hereismylife
Active member
I did the 3 quick. The other were pulled off running motor. Not honed yet. I did another set and they were still shiney after honing.
hereismylife
Active member
See how one is dull and the other is shiney chrome looking. The other 3 I just did in another sled were still chrome looking after the honing and now is back in sled and runs great.I just dont understand why these are dull.
Mac
Member
Pic number two and five look like they were honed more.... or longer period of time. The others look like they were honed lightly. Honing does not change the size much or anything at all. I would bolt em up and run em.
---mac---
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Mac
Member
After looking closer at the pics. Three of those cylinders don't look honed at all. They look to have the original hone marks. The areas around the ports that are smooth Nikasil is that the area you are calling Chrome and shiney? looks like normal wear to me.
hereismylife
Active member
You say run them. They just don't look chrome like the others do.
let’s say there is no nicasil on them, they would measure WELL under spec.
Whether there is or isn’t, they need to be measured with a snap gauge first. If they are out of spec, don’t run them, or you run the chance of busting piston skirts, and ruining cylinders.
If you measure, and they are within spec, then they have to be nicasiled.
Whether there is or isn’t, they need to be measured with a snap gauge first. If they are out of spec, don’t run them, or you run the chance of busting piston skirts, and ruining cylinders.
If you measure, and they are within spec, then they have to be nicasiled.
hereismylife
Active member
Ok. The ones I honed are around .20
.20 ?
What do you mean ?
What do you mean ?
hereismylife
Active member
The ring spec is .18 - .22
Mac
Member
Ring gap generally expressed in thousandths of an inch .018 - .020 is plenty of clearance.
What you need to measure is cylinder - piston clearance. What brand pistons are you installing? Do you have a micrometer to measure pistons and snap gauges or bore gauge to measure cylinders. These are expensive tools most guys don't have access to. If not you should take them to a dealership with tools for measurement.
---mac---
What you need to measure is cylinder - piston clearance. What brand pistons are you installing? Do you have a micrometer to measure pistons and snap gauges or bore gauge to measure cylinders. These are expensive tools most guys don't have access to. If not you should take them to a dealership with tools for measurement.
---mac---
Mac
Member
Yep, you should measure the inside of the cylinder bores, then also the pistons.
I can get you specs if you need them.
I can get you specs if you need them.