As the heading says, I have a brand new set of ACL Pistons here...theres no box or details with them, but on the crown the markings say.........RA2027.......can any parts gurus identify these for me please???..........I was told they might be ACL Duralites but I'm unsure.
Thanks in advance...........STRETCH
ACL PISTON IDENTIFICATION
Started by
_stretchlc_
, Dec 27 2011 03:43 PM
20 replies to this topic
#2
dattoman
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Posted 27 December 2011 - 03:49 PM
2027 is an old #
2028 suits 161 .... so I'm thinking red 6
Not the number listed for grey or 149 in the cattledog... 179 maybe.... still looking in old books for you
Looks like it might be an old # for 186
http://www.bowdeneng...pdf/pistons.pdf
2028 suits 161 .... so I'm thinking red 6
Not the number listed for grey or 149 in the cattledog... 179 maybe.... still looking in old books for you
Looks like it might be an old # for 186
http://www.bowdeneng...pdf/pistons.pdf
#3
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Posted 27 December 2011 - 03:55 PM
The part number does sound like some Holden 6 pistons scratchings I've seen before. Check to see if there's any other ID stampings on the pistons. Maybe you should measure the pistons with a micrometer.
#4
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Posted 27 December 2011 - 04:00 PM
ok so I just ran to the shed and whipped a piston out of this engine....would it help if I post a picture of it from a few angles???...............The block is a 186 30 thou over
#5
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Posted 27 December 2011 - 04:04 PM
It might help if yopu posted pics of any ID marks, including any letters or numbers cast or stamped anywhere on the piston, including under the piston crown.
#6
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Posted 27 December 2011 - 04:04 PM
Thanks heaps datto.........it seems that these are/might be ACL Duralites........to suit 186........they are flat tops!
#7
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Posted 27 December 2011 - 04:30 PM
As requested Chop..........theres a cast mark on the inside of one skirt that says ACL on the opposite skirt it says 95......theres nothing under the crown but there is an F on one skirt on the outside...............hopefully the shape of the piston might help!!
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#8
dattoman
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Posted 27 December 2011 - 04:41 PM
That 030 means its 30 thou oversize
#9
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Posted 27 December 2011 - 05:04 PM
.....................I know mate!ok so I just ran to the shed and whipped a piston out of this engine....would it help if I post a picture of it from a few angles???...............The block is a 186 30 thou over
#10
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Posted 27 December 2011 - 05:37 PM
Hellllllllp johnno!..........Are these duralites or standard replacement ACL pistons???
#11
Stinga
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Posted 27 December 2011 - 06:02 PM
ive got a set of 186 .030 duralites here, part number RA3000, inside is cast ACL2 and duralite
#12
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Posted 27 December 2011 - 06:13 PM
ok....so these seem like they are standard replacement pistons........I was kind of hoping they'd be a little stronger!.......Thanks for your input stinga
by the way......do they look similar to these pistons stinga?
by the way......do they look similar to these pistons stinga?
by the way......do they look similar to these pistons stinga?
by the way......do they look similar to these pistons stinga?
#13
Stinga
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Posted 27 December 2011 - 06:24 PM
stay tuned for some pics, just for comparison
#14
_oldjohnno_
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Posted 27 December 2011 - 06:25 PM
Looks like an old style 186 Duralite to me. You can verify it by measuring it, the OD should be around 3.65" and the distance from the centre of the pin to the top should be about 1.78" (or about 1.66" for a 202).
#15
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Posted 27 December 2011 - 06:39 PM
1.78" from centre of pin to top, and 3.65" diameter....thanks guys!..............anyone looking for a set of 186 .030" ACL Duralite pistons with new rings, pins and prepped rods (early red type rods.....5/16" bolts.............THESE ARENT STARFIRE RODS)????
Edited by stretchlc, 27 December 2011 - 06:40 PM.
#16
_oldjohnno_
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Posted 27 December 2011 - 07:05 PM
I bought a set of new flat top 202 Duralites from ebay a while back. When they turned up I opened the box just to make sure there was no obvious damage and that they were all there then I put them on the shelf. About 12 months later I got them down to use in an engine but when I looked at them closely every one of the bastards had the pin bore machined cockeyed, probably 2 or 3 degrees out of square at least. A bit late to complain 12 months later...
Anyway I learned the hard way to check everything carefully as soon as it is delivered. I've still got them, dunno why, might as well chuck them out...
Anyway I learned the hard way to check everything carefully as soon as it is delivered. I've still got them, dunno why, might as well chuck them out...
#17
Stinga
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Posted 27 December 2011 - 07:49 PM
pics for comparison
#18
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Posted 27 December 2011 - 09:43 PM
Thanks heaps Stinga for going to the trouble of taking those pics for me............I really do appreciate you taking the time to do that!!......Thanks heaps mate....stretch
#19
Stinga
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Posted 27 December 2011 - 09:59 PM
no worries stretch, its all good info. might even help some other people in the future. ive got a set of 202 acl pistons in the shed that i will have to dig out and have a look at now!
#20
enderwigginau
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Posted 27 December 2011 - 11:35 PM
Stings - those are new style. Most ACLs look similar to that with appropriate pin height and crowns etc for the application. Coaster bus pistons are identical to those you have, with FuD 250 pin height and a donut to increase compression on the face.
In the good old days they looked like what came out for each engine..........
In the good old days they looked like what came out for each engine..........
#21
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Posted 03 January 2012 - 05:19 PM
So I thought I would let those interested that these pistons are in fact Stirling (Federal Mogul) Duralite Pistons apparently
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