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Your cart is empty.Use with your feeler gauges to measure head, block, flywheel straightness (warping) for every application from small engines up to heavy duty diesel engines. It's made from high quality heat treated steel 1/4" thick for great stability and durability.
FIRE3311
2025-09-05 11:42:09
Congratulations to whomever Machined my Straight Edge. I tested it out on my lathe way and it is dead on flat. I appreciate your professionalism and dedication to your trade. When I need to know if something is flat I will definitely reach for my central machine straight edge for the correct answer. Not only is this straight edge flat as It can be but it was also priced fairly compared to the other options. You can be proud of your product and commitment to excellence.
Ralph
2025-09-02 10:35:49
I let my brother borrow my old Corolla for the weekend. It made it to work on Monday but overheated on the way home... I borrowed my mom's car while I paid one of my brother's friends to fix it. He didn't know what he was doing. It has uses a multi-layer head gasket and has bolts that are designed to stretch so much they can only be used once. I own the repair manual but he must not have bothered to read it. It overheated again and ended up having oil flowing out the corner where the head meets the block. I finally took it apart myself and it was bad. I had NAPA machine shop replane the head but I used a piece of a 2x4 and some sandpaper on the head deck of the block with this straight edge and a metal feeler gauge. The spec was .001" and it was just over .002" at the worst part of the gap. I got it down to about .0005" and put the head back on with a new mls gasket and a new set of head bolts. It never leaked again but I'm guessing the oil seals around the valves were bad from the aluminum head getting so hot multiple times because it had blue smoke coming out of the tail pipe and lost oil over time despite never leaking it anywhere. The straight edge seemed to be great but I sold the car for just over scrap price anyway. An aluminum head on a cast iron block with an mls gasket and expensive head bolts seems way too fragile for an engine that put out something like 90 HP. But I still have the straight edge and the gasket didn't leak anymore nor did the car overheat anymore.
Corey Perez
2025-08-30 13:12:46
This straight edge was perfect for what I needed. I was redoing a top end of an engine and needed to check the major components for true. This worked perfectly for that purpose. Comes in a robust cardboard sleeve with a plastic slip on protective sleeve to ensure the machined surface doesn't become damaged.I keep mine oiled up and have had no problems!Thanks,Corey
N. Chin
2025-08-21 11:25:35
Great product. Needed for any measuring of deck distortion.
James Farmer
2025-08-06 15:19:43
So far I've only used this to check a several pairs of aluminum cylinder heads for straightness. The first head I checked was warped beyond specs and the owner had installed it more than once and had sealing issues. The second set of heads turned out perfectly flat and allowed me to proceed with changing the head gaskets with utmost confidence that all my time and money would not be spent in vain. The car had zero problems upon completion. I really have no means of fully verifying the accuracy of this tool unless I purchase another one down the road but I feel confident in it being made here in the states. The tool itself is robust and should provide years of service .
BitTwiddler
2025-06-26 16:27:48
It is extremely well made, sturdy, and with a little care will be a lifetime tool. Just that when I ordered it I thought was longer. I don't regret what I spent; but for outside on-maneuvers I bought a 2' plastic $10 one to take the really rough stuff. This is an 'indoor shop tool'. I'm told this one is sold under a different brand name for a good deal more.... It is worth what I paid for it, definitely.
James T.
2025-06-24 12:06:15
The professional mechanic needs this sadly not many of the use this or even know what it is but if your doing head jobs u need this tool
Robin R. Ainscough
2025-06-21 13:31:19
I wasn't expecting miracles from this straight edge, but if you are building race engines this tool is not enough to expose minor warping. On high compression motors (14:1 +) you'll want to take the head/block to a good machine shop.
Gatycon
2025-06-17 18:18:06
I mean, sure it worked great for checking the deck and head straightness on my engine, but what I wasn't prepared for was how it improved my love life. Since I bought this I've been getting asked out by about five women every day! Thanks Central Tools!Mine shipped in a large padded box, no issues like other reviewers mentioned. It's made in the USA and comes with a small cardboard box and a plastic edge guard. Make sure you store this vertically in a dry place, and put a bit of oil on the machined edge. If it gets dropped, bent, or the edge gets corroded then it's garbage.
FIRE3311
2025-06-09 15:42:25
Congratulations to whomever Machined my Straight Edge. I tested it out on my lathe way and it is dead on flat. I appreciate your professionalism and dedication to your trade. When I need to know if something is flat I will definitely reach for my central machine straight edge for the correct answer. Not only is this straight edge flat as It can be but it was also priced fairly compared to the other options. You can be proud of your product and commitment to excellence.
Ralph
2025-05-18 11:49:41
I let my brother borrow my old Corolla for the weekend. It made it to work on Monday but overheated on the way home... I borrowed my mom's car while I paid one of my brother's friends to fix it. He didn't know what he was doing. It has uses a multi-layer head gasket and has bolts that are designed to stretch so much they can only be used once. I own the repair manual but he must not have bothered to read it. It overheated again and ended up having oil flowing out the corner where the head meets the block. I finally took it apart myself and it was bad. I had NAPA machine shop replane the head but I used a piece of a 2x4 and some sandpaper on the head deck of the block with this straight edge and a metal feeler gauge. The spec was .001" and it was just over .002" at the worst part of the gap. I got it down to about .0005" and put the head back on with a new mls gasket and a new set of head bolts. It never leaked again but I'm guessing the oil seals around the valves were bad from the aluminum head getting so hot multiple times because it had blue smoke coming out of the tail pipe and lost oil over time despite never leaking it anywhere. The straight edge seemed to be great but I sold the car for just over scrap price anyway. An aluminum head on a cast iron block with an mls gasket and expensive head bolts seems way too fragile for an engine that put out something like 90 HP. But I still have the straight edge and the gasket didn't leak anymore nor did the car overheat anymore.
Corey Perez
2025-04-23 17:55:09
This straight edge was perfect for what I needed. I was redoing a top end of an engine and needed to check the major components for true. This worked perfectly for that purpose. Comes in a robust cardboard sleeve with a plastic slip on protective sleeve to ensure the machined surface doesn't become damaged.I keep mine oiled up and have had no problems!Thanks,Corey
N. Chin
2025-04-10 11:22:45
Great product. Needed for any measuring of deck distortion.
James Farmer
2025-03-08 10:40:45
So far I've only used this to check a several pairs of aluminum cylinder heads for straightness. The first head I checked was warped beyond specs and the owner had installed it more than once and had sealing issues. The second set of heads turned out perfectly flat and allowed me to proceed with changing the head gaskets with utmost confidence that all my time and money would not be spent in vain. The car had zero problems upon completion. I really have no means of fully verifying the accuracy of this tool unless I purchase another one down the road but I feel confident in it being made here in the states. The tool itself is robust and should provide years of service .
BitTwiddler
2025-02-17 18:52:54
It is extremely well made, sturdy, and with a little care will be a lifetime tool. Just that when I ordered it I thought was longer. I don't regret what I spent; but for outside on-maneuvers I bought a 2' plastic $10 one to take the really rough stuff. This is an 'indoor shop tool'. I'm told this one is sold under a different brand name for a good deal more.... It is worth what I paid for it, definitely.
James T.
2024-12-29 18:57:24
The professional mechanic needs this sadly not many of the use this or even know what it is but if your doing head jobs u need this tool
Robin R. Ainscough
2024-12-06 21:19:48
I wasn't expecting miracles from this straight edge, but if you are building race engines this tool is not enough to expose minor warping. On high compression motors (14:1 +) you'll want to take the head/block to a good machine shop.
Gatycon
2024-11-19 16:42:02
I mean, sure it worked great for checking the deck and head straightness on my engine, but what I wasn't prepared for was how it improved my love life. Since I bought this I've been getting asked out by about five women every day! Thanks Central Tools!Mine shipped in a large padded box, no issues like other reviewers mentioned. It's made in the USA and comes with a small cardboard box and a plastic edge guard. Make sure you store this vertically in a dry place, and put a bit of oil on the machined edge. If it gets dropped, bent, or the edge gets corroded then it's garbage.
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