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Posted: Mon Jun 09, 14 11:50 pm
by mopar_mark
Mick70RR wrote:mopar_mark wrote:Mick70RR wrote:You sure about that Mark?
I thought piston to wall clearance is the difference between the piston skirt diameter and the cylinder diameter.
0.008" sounds too much to me, 0.004" sounds about right for a forged piston in a small block.
As I understand the bore diameter is now 0.008" bigger than the Piston skirt diameter. Therefore the clearance is 0.004"
I'd say the clearance is 0.008".
My error Mick, you are correct the Piston to Wall clearance is indeed 0.008".
In Engineering terms of say a bore to shaft, it would be 0.004" clearance.
Posted: Tue Jun 10, 14 12:43 am
by Cannonball
mopar_mark wrote:Mick70RR wrote:mopar_mark wrote:
As I understand the bore diameter is now 0.008" bigger than the Piston skirt diameter. Therefore the clearance is 0.004"
I'd say the clearance is 0.008".
My error Mick, you are correct the Piston to Wall clearance is indeed 0.008".
In Engineering terms of say a bore to shaft, it would be 0.004" clearance.
NOT OFTEN YOU GET THEM SPECS MARK
MORE LIKE 3"-4" SHAFT TO BORE CLEARANCE AFTER A FEW STROKES, AND THE BORE IS NICELY LUBRICATED,
Posted: Tue Jun 10, 14 4:19 pm
by Carl
Mick70RR wrote:I'm sure you'll be fine Carl.
By the way how do you measure your bearing clearances?
Oi behave
Posted: Thu Jul 31, 14 9:57 am
by Carl
Okay its here, your next instalment of the rebuild you have all been eagerly awaiting.
The Block came back looking like this after its 5tho hone, its not 100% but a vast improvement on what it was. They said to get all the scratches out I would be going into the next overbore size and the block wont take it.
The black marks are from gapping the rings.
Posted: Thu Jul 31, 14 10:12 am
by Carl
Then the block got stripped of all the old paint and a good wash down to clean the bores from the re hone. And the Block got a new lick of paint.
Posted: Thu Jul 31, 14 10:23 am
by Carl
I gave the pistons a bit of a clean up, not great but better than how they came out. And Total Seal rings fitted.
Posted: Thu Jul 31, 14 10:26 am
by Carl
A measure up of the mains and crank, and plenty of Bearing Guard on the shells.
Posted: Thu Jul 31, 14 10:28 am
by Adrian Worman
Keep at it mate
Posted: Thu Jul 31, 14 10:44 am
by autofetish
so so so good
was great to meet you at the nats fella
as said when I win the lotto me and you are going to build my hemi on the street
keep the pictures coming
Posted: Thu Jul 31, 14 10:44 am
by Carl
Im trying Ade mate
Posted: Thu Jul 31, 14 10:47 am
by Carl
autofetish wrote:so so so good
was great to meet you at the nats fella
as said when I win the lotto me and you are going to build my hemi on the street
keep the pictures coming
Was good to meet you to Will, cheers for the Beers. I would rather build it in a workshop mate
Posted: Thu Jul 31, 14 10:56 am
by Carl
Almost forgot about the rear oil seal going in.
Used my trusty High Tack Gasket Sealant in the groove then placed seal into grove gluing it in. Then Greased around the seal.
Posted: Thu Jul 31, 14 10:59 am
by Carl
Crank goes in
Posted: Thu Jul 31, 14 11:06 am
by Carl
Time to pop the Pistons in at last. The Bore got another good dosing of oil as did the ring compressor. Yippee the Pistons are finally in the correct cylinders. And as you can see there is a noticeable PTW clearance now.
Posted: Thu Jul 31, 14 11:10 am
by Scooby
Nice work mate....keep posting