There are a few schools of thought when it comes to head studs versus head bolts. Some mechanics will tell you that studs are better because they allow for more torque to be applied to the head, which leads to a tighter seal. Others will say that bolts are better because they're less likely to come loose and cause engine damage. Ultimately, it's up to you to decide which is best for your engine.
You can reuse your cylinder head bolts, but it is not recommended. The bolts can stretch and become damaged, which can cause problems with the seal between the cylinder head and the engine block. It is best to replace the bolts when you replace the cylinder head gasket.
Torqued bolts can be reused, but it is important to check their condition first. If the bolts are damaged or show signs of wear, they should be replaced. It is also important to check the torque rating of the bolts before reuse.
If you overtighten head bolts, you can cause serious damage to the engine. The head bolts hold the cylinder head in place, and if they are too tight, they can distort the metal and cause the head to crack. This can lead to a loss of compression, and the engine will not run properly.
5/5
Head Bolt Outer 11095AA123 X8 & Head Bolt Inner 11095AA141 x4
1999-2012 Outback and Legacy and Baja (4-Cyl. Only)
1999-2009 Impreza (Non-Turbo)
1999-2009 Forester (Non-Turbo)
Genuine Head Bolt kit for your 1999 and newer Subaru 2.5 SOHC NON-TURBO.
$234
The title accurately describes these as authentic Subaru Head Bolts. The EJ253 in my 2007 Subaru Impreza 2.5i has a spinning rod, so I'm using these to rebuild it. With the aid of less expensive end 12 point sockets, I chowdered up a few of the old head bolts. Be cautious. Second, make sure you adhere strictly to your torque specifications. These bolts need to be stretched by being slightly overtorqued. Don't forget to perform this to prevent head gasket failure.
4.7/5
4 coated black steel bolts (with 4 washers and 4 lock washers)
Overall length 1-1/4" (thread size 5mm x 80); Air Cleaner Bolt and Washer Kit
Reference: 90091RAAA00 90091-RAA-A00 41085
Helps protect engine from dirt and water by fastening securely; Compatible with Honda - 2007-14 Accord (does not fit 2012 2.4L L4), 2010-11 Accord Crosstour, 2012-14 Crosstour, 2009-14 Fit (excludes electric), 2007-10 Odyssey, 2009-14 Pilot, 2007-14 Ridgeline; Acura - 2007-13 MDX, 2007-12 RDX, 2007-12 RL, 2014-17 RLX, 2007-14 TL, 2006-08 TSX (2.4L only), 2010-13 Acura TSX (V6 only), 2010-13 ZDX
Premium heavy duty coated black steel
$234
These matched my 2006 Honda Pilot exactly. These measure one inch in length and have an M5 x 0.8 thread. Use an 8mm socket or wrench on the bolt head. I am aware of this information because, after snapping off two of the original bolts, I spent hours attempting to drill and tap my lower air filter box.Amazon claimed that they wouldn't fit my car, but I measured them anyhow because there were two original bolts that were still in good condition.I hope this is helpful.
4.3/5
Meets or exceeds all original equipment specifications
Validated for fit, form and function
Unsurpassed quality you can trust
Properly torque bolts per manufactures specifications
Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
Follow recommended tightening sequence for head bolts
Application specific design to ensure a perfect fit
$234
When it comes to aftermarket components, being a licensed service technician places you in a difficult situation. Nine times out of ten, if I'm saving consumers money on a side job, I'll pick a fel pro product over any other aftermarket brand. Why some folks struggle with these bolts is beyond me. I've used four sets of them and haven't encountered any issues. I utilized a set of genuine GM bolts that I was given by a coworker for my most recent head replacement, and quite honestly, they functioned and felt the same. Wish me luck as I complete my second SBC build and make the best decision possible.
4.3/5
LS Series
SB Chevrolet Gen III
Header Bolt & Stud Kits
$234
Installed on a 2009 G8 GT, the part fit well and was of course of exceptional quality. Perfect for anyone replacing OEM manifold nuts or installing headers on LS-based blocks. The smaller head on these makes it much more practical and simpler to utilize a 10mm wrench in the spaces. Due to their lower size, they even prevented the bolt from making contact with the spark plug heat shield.
4.1/5
HIGH QUALITY: Crafted from hardened S2 tool steel, a material used in premium tools and known for its extreme toughness, this head bolt tool will not yield under high torque applications
GREAT FIT: This head bolt socket is compatible with Volkswagen and Audi vehicles such as, but not limited to, the Jetta, Beetle, Passat, A4, A6, and TT
PERFECT LENGTH: The ATLIN head bolt wrench has an overall length of 140mm (5.5â€). Excluding the chrome socket base, the length is 102mm (4.0") - more than enough to reach the head bolts on compatible Audi and VW vehicles
SIZING: 1/2" drive, 10mm polydrive bit
$234
At an auction, I purchased a 2010 VW Tiguan 2.0 that wouldn't start or run. When I brought it home, I discovered that the cylinder head would need to be taken off and that the valves were bent. When I couldn't find the particular socket locally that I required to remove the head bolts, I looked online and discovered these. These were flawless. The engine was successfully fixed, and the vehicle is now moving.
4.1/5
Unsurpassed quality you can trust
Meets or exceeds all original equipment specifications
Validated for fit, form and function
Follow recommended tightening sequence for head bolts
Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
Application specific design to ensure a perfect fit
Properly torque bolts per manufactures specifications
$234
For my 2000 Chevrolet 4.3 Blazer, I required new Head bolts. I purchased them from Amazon.com. They came a few days after I placed the order. They fit perfectly and performed equally well to OEM bolts. The bolts on this kind of engine must be changed if the cylinder head is removed. It was very simple to purchase them from Amazon.com. While I was just sitting here, I did a key word search, pointed, clicked, and checked out. Thank you, Amazon!
3.7/5
Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
Validated for fit, form and function
Meets or exceeds all original equipment specifications
Application-specific design ensures a perfect fit
$234
I got them when I disassembled the cylinder heads on my 2002 Chevrolet Silverado 2500HD's 6.0L engine to perform some repairs. For whatever reason, using new bolts and not reusing the old ones is strongly advised (many repair books even state that it is needed). I don't know why, but I still changed them. For the V8 engine, two sets are required because this set only contains enough bolts for one head. I erred by failing to pay attention to the illustration and failing to comprehend that two sets were necessary if working on both cylinder heads.
2.8/5
Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
Unsurpassed quality you can trust
Validated for fit, form and function
Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
$234
This head bolt set is no exception to the rule that anything bearing the Fel-Pro name will be of the highest quality. I can say with certainty that it is OEM quality, and I have had no issues with these bolts. Although I abuse these head bolts to the tune of an engine with a little more than 500 crank horsepower and drag race my car over an eighth mile on summer weekends, I have never had a problem with them. Anyone else seeking for outstanding quality and amazing value in a set of head bolts should definitely consider them.
2/5
Grade 5
Zinc plated
3/4 In. length
Made from high quality material
$234
This head bolt set is no exception to the rule that anything bearing the Fel-Pro name will be of the highest quality. I can say with certainty that it is OEM quality, and I have had no issues with these bolts. Although I abuse these head bolts to the tune of an engine with a little more than 500 crank horsepower and drag race my car over an eighth mile on summer weekends, I have never had a problem with them. Anyone else seeking for outstanding quality and amazing value in a set of head bolts should definitely consider them.
If a bolt is over-torqued, it can stretch or even break. This can cause problems because the bolt will no longer be able to properly hold things together. Over-torquing can also damage the threads on the bolt or the surface it's being tightened against.
No, you cannot use head bolts twice. Head bolts are designed to be used once and then discarded. The reason for this is that the bolts are tightened to a specific torque and then stretch a specific amount. Once the bolts are removed, they cannot be reused as they will not provide the same level of clamping force.
Do you torque head studs? Head studs are an important part of any engine, and it is critical that they are properly torqued. There are a few different ways to torque head studs, and the best method will vary depending on the application. In general, however, it is best to use a torque wrench to ensure that the head studs are properly tightened.
Head bolts are designed to be used once and then discarded. However, in some cases, it may be possible to reuse them. If the bolts are still in good condition and have not been damaged, they can be reused. However, it is always best to consult with a mechanic to ensure that they are still safe to use.
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