ACDelco 41-110 Professional Iridium Spark Plug. Some unusual spark plugs like those on the late model Ford Triton engines are just prone to breaking. It probably began when aluminum cylinder heads first started showing up in mass-produced vehicles. Screw in the spark plug finger tight until the gasket meets the cylinder head. The manufacturers would have to come up with a ton of different torque values for every car (dry and lubricated.) Unfortunately, the potential for problems increases when high mileage spark plugs are left untouched in relatively soft aluminum cylinder heads. Tighten each of the 390's spark plugs to between 15 and 20 ft-lb of torque. In this video, Steve Darnell from WelderUp shows … I am an old timer and had a 1969 SS 396 that subsequently . Engine Torque Specifications. The Edelbrock #60999 Performer RPM cylinder heads are designed for 1955-86 SB Chevy applications. Ever since, many technicians have felt that it was necessary to add a dab of antiseize to the spark plug threads due to the dissimilar metals. Spark plugs for the Chevy 350 engine are readily available from any auto parts store. Another EZ Read reference. Listed under Extras and some specific car models, RockAuto … Skip to the end of the images gallery. Add to Wish List. Way too much! GM 5.7L-350ci-V8 Engine Torque Specs. As said many . Bored&Stroked. Nobody wants damaged threads in a cylinder head or half a spark plug frozen in place. I’ve never torqued them either Champion Auto Parts | Replacement & Aftermarket Auto Parts. The spark plug holes must always be cleaned prior to installation, otherwise you may be torquing against dirt or debris and the spark plug may actually end up under-torqued, even though your torque wrench says otherwise. Edelbrock says to run the Champion RC12YC (or equivalent) plug in their head (Performer RPM angle plug aluminum). Spark Plugs. Then tighten the plug as specified below: With a Torque Wrench: Please note there are slight variations in torqueing recommendations between spark plug manufacturers. 2. Over 6,000 Automotive Torque Specs. Anti-seize can alter the tightening torque up to 20%, increasing the risk of breakage. Ok thanks - - - Updated - - - I am anxious to see if these perform better than the ported 915s. Search Car Torque Specifications by Engine or Model. good shape. Joined: May 26, 2015 Location: Blue Hill Local Time: 2:36 PM. This can distort the metal plug shell, which often results in engine damage. Understanding Aluminum Heads and Spark Plugs . Also, is there a shorty spark plug that will work if there is interference with the header pipe? Ford Motor has completed substantial dyno testing of Full-Torque inserts to validate and approve their use in aluminum cylinder heads. Oct 29, 2017 #1. grubby65 Well-Known Member. He has a 327 with 62cc 2.02 world heads and flat tops with valve releifs. Aluminum heads use gaskets that are seat-style long reach, whereas iron heads have a tapered seat-style and short reach spark plugs. Some heads are almost identical, the only significant s=difference being the type of spark plug used, so be sure to inspect the head closely to be sure the right plug is used. Spark plug gap. Refer to the plug manufacturer's specifications for proper torque. times, any bolt hole should be clean and if in doubt run a tap through it to make sure the threads are clean and in . In the absence of this tool, the table below provides a generic guide to torquing a replacement plug based on the number of turns after the plug becomes finger-tight. Another area that can be problematic is thermostat housing bolts on old iron manifolds due to rust. Important: Apply anti-seize to all spark plugs to ensure a long thread life. Eight spark plugs are required to keep the engine running smoothly. These large engine parts benefited from their aluminum construction and shed around 100 pounds from the vehicles total weight. Spark Plug seizure in an aluminum cylinder head is usually caused by improper installation and too much torque. Using anti-seize on spark plugs installed in aluminum cylinder heads was very common as the steel shells would seize in the aluminum. Spark Plug Torque Specifications: Attention: 1. There is a famous old theory that aluminum heads have more compression ratio because they dissipate more heat, whereas iron heads are able to make more power since the chamber locks in the heat. ft. 8-12 lb. Post: spark plugs for world product heads? 07-24-05 08:17 AM - Post# 746594 Hey guys, Im tryin to help a guy out and I need a plug reccomendation. About strippin' the holes, I have something from the world of 4 banger car with aluminum heads and deep plug holes (gimmie a break, ... 1932 heads have a 7/8 - 18 spark plug. Member. Not sure what to recommend, but I got Autolites as there aren't many options in that thread. Skip to the beginning of the images gallery. Full-Torque spark plug inserts for aluminum heads are made of aluminum and are hard anodized to improve the strength and integrity of the threads. Torque Spec Database. Get the advice and know-how you need to complete that next … Motors or what ever you might lovingly call the motor. November 7, 2019 Roadkill Customs How To & DIY. ft. 10-18 lb. Messages: 161 Likes Received: 127. Big Block Chevrolet Head Bolt Torque Sequence. I cannot say for sure this is what happened when I've had to put a thread repair kit in the head, but anti-seize will definitely help prevent it. Here are some of the details: Rear wheel hp 360 Rear wheel torque 390 MSD 6AL box, MSD distributor and wires Aluminum Procomp heads 10-1 compression 91 … Does anyone know if this will be too hot a plug for a 12.5 to 1 C/R motor? A torque wrench is always recommended for tightening spark plugs and is an absolute must for an aluminum head. What’s more, this set comes as a pack of eight, allowing you to fully replace the spark plugs in your engine, or have some lying around for spares. Torque sequence for big block aluminum heads Special considerations. Cars built 10 years ago already started using aluminum cylinder heads. Overtighten and you could damage the plug as well as the threads in the engine head. Aluminum sacrifices to just about every other metal (except maybe zinc and magnesium). I like AC delco stuff, but it appears they don't offer a plug for this application. But if you exert mega force to remove a stuck spark plug, you can also shear off the threads in the aluminum cylinder head, and that’s a MAJOR repair. Torque Specifications 10mm Gasket Seat 12mm Gasket Seat NOTE: Spark plugs should be installed with clean and dry threads to avoid over-torqueing. Exhaust Manifold. No longer necessary as modern spark plug coatings work as a releasing agent and should be installed dry. (Topic#107663) greg_moreira Very Senior Member Posts: 3274 Reg: 10-06-03. ft. It_s_Me. This assures easy removal of the spark plug and prevents corrosion and seizing. Electrical & Ignition. heat ranges colder. Tighten all cylinder head bolts to between 80 and 90 ft-lb of torque. Joined: Jan 14, 2005 Posts: 4,107. How To Helicoil Damaged Spark Plug Threads . Many modern cars have aluminum cast heads, which is a “soft” metal, meaning it is easy to strip out the spark plugs thread by over-tightening. ft. 12mm: 10-18 lb. eroded aluminum in the water area just go slow when tightening bolts and always run a tap in any suspect threads. See ignition manufacturer recommendations to determine spark plug gap. Clean the spark plug threads and ensure the cylinder head is clean of debris. I have relatively mild street 400/500 stroker motor. Profile Page. As a result, the firing end of the spark plug can overheat and pre-ignition can occur. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. Serious engine damage can follow. October 26, 2018, 8:22pm #7. got a 427. ALUMINUM HEADS; SPARK PLUG THREAD SIZE: WITH TORQUE WRENCH: WITH TORQUE WRENCH: GASKET TYPE: 10mm: 8-12 lb. Of course, you should only install spark plugs in a cool engine, because metal expands when its hot and installation may prove difficult. - - - Updated - - - Am also going to use the low deck Performer RPM intake manifold with this PERF RPM HEAD. Spark Plug Gap. Removing a stuck spark plug without damaging the cylinder head takes time and patience. Long(er) spark plug change intervals only aggravate the problem. What I worry about is the bi-metal (steel plug - aluminum threads) where the threads in the heads attach themselves to the spark plug and then get pulled out when removing spark plugs. Unfortunately, the spark plug that screws into the threaded hole that allows the electrode to spark combustion has an outer shell constructed of steel. During the BBC production, the spark plugs changed from gasketed to tapered seat. Before installing any spark plug, always apply antiseize to threads. It may or may not interfere with your radio/electronics,but usually not as bad as solid core wires. Aluminum heads require parallel ground hardened … SHARE POST #29. Whether the plugs are steel or some other hard alloy, the aluminum heads are likely to sacrifice to the plugs. A well designed spark plug might be made of an alloy that reduced galvanic corrosion but it's unlikely to eliminate it altogether. They use the .750"reach(long thread) gasket seat plug and need the smaller 5/8" head for a socket to fit on. Depending on the year of the engine, the spark plugs may stick straight out or set at a 35-degree angle. For this reason, the 390's factory torque specifications should be followed. They are made of aluminum to insure they will transfer heat from the spark plug the same as original. Torque Specifications for GM 5.7L-350ci-V8: Bell Housing To Engine Block 30 Ft-Lbs 360 In-Lbs 40.67 N-m Years: All Note: Chevy Small Block Type: Dim: Length: Head: Grade: Bell … Tighten all intake manifold bolts to within a range of 32 and 35 ft-lb of torque. I run a bigblock with GMPP aluminum heads. With longer spark plug life it’s not uncommon to run into a stuck spark plug. RPM Small-Block Chevy Angled Spark Plug 64cc, Flat Tappet Springs . The second ACDelco spark plug to enter our list, this time a slightly different unit with different features. May 12, 2014 Roadkill Customs Automotive Basics, Technical Info. I found a bunch of Bosch and Denso stuff that fits. This is the Head Bolt Torque Sequence (Pattern) for the Mark IV Big Blocks, Rat . CALL TO ORDER 888-799-1135. Spark plugs. Be the first to review this product. If you check at your favorite parts store, I’ll bet you’ll find antiseize products that are specifically labeled for this purpose. The cam is a 292 degree, 230 at .050 with .480 … The best torque wrench to get is the kind with the "twist" adjustment because you can't overtighten with these. Spark Plug Torque Recommendations. User Info. $829.50. Heads have a .400" valve relief.3-5/16" bore, 4" stroke = 9:1 compression ratio3-5/16" bore, 3 3/4" stroke = 8.6:1 compression ratio. The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. I use Champion race plugs because I dont want a resistor. V4, Jul 14, 2009. Send Private Topic View Profile. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. Intake Manifold. 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