Is it necessary to rehone and change the rings?
Is it necessary to rehone and change the rings? Here while my engine is out of the car, I can't make up my mind whether I should change the rings and rehone it, or will it be better left alone as it is.
Compression is 150 psi on +/-3 on all cylinders (9.2:1 CR), very even I would say.
Should I rering the block, or should I better not touch it?
Compression is 150 psi on +/-3 on all cylinders (9.2:1 CR), very even I would say.
Should I rering the block, or should I better not touch it?
How many miles? You can run a light hone just to restore the cross hatch or take a ball hone to the cylinders. Wash it really good and put new rings in there. Anytime the engine comes out and it has decent miles on it, it is an excellent time to do inspections and do some maintenance. It can reveal stuff you didnt notice and save you headaches later.
yeah I agree with "don't fix it if it ain't broken", and compression is good for low CR engine...
95% that crank will be out to replace main bearings (I will visually check them tomorrow hopefully), so no problem here. I just don't want to mess with it and risk making it worse... For example I doubt our local shops will care to install deck plate before rehoning
edit: after thinking a bit I guess deck plate is not needed for honing?
95% that crank will be out to replace main bearings (I will visually check them tomorrow hopefully), so no problem here. I just don't want to mess with it and risk making it worse... For example I doubt our local shops will care to install deck plate before rehoning
edit: after thinking a bit I guess deck plate is not needed for honing?
Last edited by Vetal; Oct 21, 2013 at 01:24 AM.
I've visually checked all cylinders, and number 3 and 4 have vertical grooves that I can slightly feel with my finger (inner side, closer to center).
I guess there is no point in honing then? Either assemble as it is, or bore larger, with new pistons/rings?
I guess there is no point in honing then? Either assemble as it is, or bore larger, with new pistons/rings?
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Can you catch the grooves with a finger nail?
I went through this on my last engine, and you'll get conflicting info from people by just showing pics and not seeing it in person..
It's catch 22, you can run it now and get away with it for awhile.. But like I was told, if there are deep grooves they only get worse with time..
What's your engine guy say? Is he leaving the Decision up to you?
I went through this on my last engine, and you'll get conflicting info from people by just showing pics and not seeing it in person..
It's catch 22, you can run it now and get away with it for awhile.. But like I was told, if there are deep grooves they only get worse with time..
What's your engine guy say? Is he leaving the Decision up to you?
Can you catch the grooves with a finger nail?
I went through this on my last engine, and you'll get conflicting info from people by just showing pics and not seeing it in person..
It's catch 22, you can run it now and get away with it for awhile.. But like I was told, if there are deep grooves they only get worse with time..
What's your engine guy say? Is he leaving the Decision up to you?
I went through this on my last engine, and you'll get conflicting info from people by just showing pics and not seeing it in person..
It's catch 22, you can run it now and get away with it for awhile.. But like I was told, if there are deep grooves they only get worse with time..
What's your engine guy say? Is he leaving the Decision up to you?
When your nail can hook into it and stop when your sliding your nail over it, that's when the scratch can get serious because material has been removed from the cylinder walls and gets trapped in between piston rings among other places..
What's the best solution, replace 2 sleeves and rehone / rering all 8?
Looking at things away from "scratches" and stuff...
Before I opened it up, I was perfectly happy with my cylinders, nice even compression, some oil consumption but not too much.
So I guess problem is more in my mind now ) I guess I will not try to "fix" it this time. Good idea or not?
Looking at things away from "scratches" and stuff...
Before I opened it up, I was perfectly happy with my cylinders, nice even compression, some oil consumption but not too much.
So I guess problem is more in my mind now ) I guess I will not try to "fix" it this time. Good idea or not?
As said above, if your finger nail can "feel" the scratch, thats about .010 or more. Just hone all of the cylinders, re-ring and be done.That way you'll have the piece of mind, and it should be good to go for a long time.$.002.
