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Steve M Forums Junkie Location: Adelaide Registered: June 2003	Re: 18RG block with unknown Pistons Sun, 14 August 2005 01:09 Are they forged? Only one way to tell for sure, show us a photo from the bottom of the piston. If you can get a direct side on shot of the domes that might help. If you could post the dome height and bore size that could help too. The amount of flat between the valve cut-outs is slightly skinnier than the Arias 12.5s. The sides of the dome are steeper and more square in shape than the Arias ones. All I can guess is that they are definately not of lower compression than the Arias 12.5:1s unless their bore is smaller than 92mm. The depth of the valve cut outs doesn't look like the reason that valves were damaged. They appear plenty deep enough. Most likely the valves were hitting each other, the valve cutouts were on the wrong angle or there was a timing issue. What are the cams that came with the engine, got any pics? If Toyota cams, is there a number stamped into the cam on the flat that the cam timing cog goes onto? If so, what is the number? Also what are the valve sizes? If they are TRD ones, I may be able to source some new ones for you through an upcoming Toysport Order. [Report message to a moderator]

	Subject	Poster	Date
	18RG block with unknown Pistons(with close up pics)	wolverine	Fri, 12 August 2005 10:20
	Re: 18RG block with unknown Pistons	munki	Fri, 12 August 2005 11:30
	Re: 18RG block with unknown Pistons	bbaacchhyy	Fri, 12 August 2005 11:43
	Re: 18RG block with unknown Pistons	wolverine	Fri, 12 August 2005 11:58
	Re: 18RG block with unknown Pistons	earlyrolla	Fri, 12 August 2005 12:33
	Re: 18RG block with unknown Pistons	THE WITZL	Sat, 13 August 2005 05:13
	Re: 18RG block with unknown Pistons	Mr DOHC	Sat, 13 August 2005 07:06
	Re: 18RG block with unknown Pistons	Steve M	Sun, 14 August 2005 01:09
	Re: 18RG block with unknown Pistons	wolverine	Mon, 22 August 2005 10:08
	Re: 18RG block with unknown Pistons	Mr DOHC	Mon, 22 August 2005 11:35
	Re: 18RG block with unknown Pistons(with close up pics)	wolverine	Mon, 22 August 2005 11:48
	Re: 18RG block with unknown Pistons(with close up pics)	Mr DOHC	Mon, 22 August 2005 12:01
	Re: 18RG block with unknown Pistons(with close up pics)	wolverine	Mon, 22 August 2005 12:09
	Re: 18RG block with unknown Pistons(with close up pics)	andrewvibert	Mon, 22 August 2005 22:42
	Re: 18RG block with unknown Pistons(with close up pics)	wolverine	Thu, 25 August 2005 07:51
	Re: 18RG block with unknown Pistons(with close up pics)	YelloRolla	Thu, 25 August 2005 10:11
	Re: 18RG block with unknown Pistons(with close up pics)	wolverine	Thu, 25 August 2005 20:28
	Re: 18RG block with unknown Pistons(with close up pics)	Steve M	Fri, 26 August 2005 08:22

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