 7afe Piston sizes |
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 Nov 17, 2013 - 1:56 PM
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Enthusiast Joined Sep 11, '10 From Tennessee Currently Offline Reputation: 0 (0%)  |
I'm just starting to tear down a spare 7afe for my celica. I don't know if I will need pistons or other machine work yet as the engine has >250K on it. I read Smaay's excellent rebuild thread but I still have a question. With aftermarket pistons I see either STD or oversize. I don't see them broken down into 3 std sizes like oe pistons. Why is that? Is it a "close enough" kind of thing? If I need a piston I'll most likely get an oe toyota one but I was curious on this.
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Nov 18, 2013 - 12:00 PM
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Enthusiast  Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
when you go OS, the bore is machined to match the piston. OEM has various sizes because of mass production.
I highly suggest getting the oversized pistons and have the block machined. the 7A responds very well to this upgrade. In fact the engine in the build thread is for sale now. -------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Nov 18, 2013 - 1:00 PM
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Enthusiast Joined Sep 11, '10 From Tennessee Currently Offline Reputation: 0 (0%) |
QUOTE (Smaay @ Nov 18, 2013 - 1:00 PM)  when you go OS, the bore is machined to match the piston. OEM has various sizes because of mass production. I highly suggest getting the oversized pistons and have the block machined. the 7A responds very well to this upgrade. In fact the engine in the build thread is for sale now. Thanks for your replay. I understand what you're saying, let me rephrase my question. With an aftermarket std piston how would you know which oem bore size(1,2 or 3) it would fit? There's .004" difference between sizes according to the bgb. On the engine for sale, where and how much? Thanks, This post has been edited by whirledpeaz: Nov 18, 2013 - 1:03 PM |
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Nov 18, 2013 - 3:46 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
i think you are reading into things. you need to measure the bore first, then get the right sized piston.
the engine is here in CA, I want 800 for it since its a full rebuild with OS pistons and about 5000 miles on it. The shipping to TN will be the killer. Since i dont want to do it, it will cost $$$$$$$$$$ This post has been edited by Smaay: Nov 19, 2013 - 9:20 AM -------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Nov 18, 2013 - 10:08 PM
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Enthusiast Joined Sep 11, '10 From Tennessee Currently Offline Reputation: 0 (0%) |
QUOTE (Smaay @ Nov 18, 2013 - 4:46 PM) i think you are reading into things. you need to measure the bore first, then get the right sized piston. the engine is here in CA, I want 800 for it since its a full rebuild with OS pistons and about 5000 miles on it. The shipping to TN will be the killer. Sine i dont want to do it, it will cost $$$$$$$$$$ Thanks for the reply, I'd forgot about your location! thanks again, |
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