(Topic#107663) greg_moreira Very Senior Member Posts: 3274 Reg: 10-06-03. Removing a stuck spark plug without damaging the cylinder head takes time and patience. Ok thanks - - - Updated - - - I am anxious to see if these perform better than the ported 915s. CALL TO ORDER 888-799-1135. Anti-seize can alter the tightening torque up to 20%, increasing the risk of breakage. This can distort the metal plug shell, which often results in engine damage. During the BBC production, the spark plugs changed from gasketed to tapered seat. Not sure what to recommend, but I got Autolites as there aren't many options in that thread. heat ranges colder. ft. 10-18 lb. 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. GM 5.7L-350ci-V8 Engine Torque Specs. Joined: May 26, 2015 Location: Blue Hill Local Time: 2:36 PM. With longer spark plug life it’s not uncommon to run into a stuck spark plug. He has a 327 with 62cc 2.02 world heads and flat tops with valve releifs. Torque Spec Database. Long(er) spark plug change intervals only aggravate the problem. Serious engine damage can follow. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. good shape. 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. Profile Page. Member. Ford Motor has completed substantial dyno testing of Full-Torque inserts to validate and approve their use in aluminum cylinder heads. Get the advice and know-how you need to complete that next … Spark Plug Torque Recommendations. ACDelco 41-110 Professional Iridium Spark Plug. A stock application that would use the champ plug is a "2003 Chevy Tracker w/2L engine". It may or may not interfere with your radio/electronics,but usually not as bad as solid core wires. I like AC delco stuff, but it appears they don't offer a plug for this application. Some unusual spark plugs like those on the late model Ford Triton engines are just prone to breaking. - - - Updated - - - Am also going to use the low deck Performer RPM intake manifold with this PERF RPM HEAD. Add to Wish List. RPM Small-Block Chevy Angled Spark Plug 64cc, Flat Tappet Springs . Skip to the beginning of the images gallery. Before installing any spark plug, always apply antiseize to threads. Send Private Topic View Profile. 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 … Does anyone know if this will be too hot a plug for a 12.5 to 1 C/R motor? Cylinder Head Bolts. Click on One of the Links Below . The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. Refer to the plug manufacturer's specifications for proper torque. May 12, 2014 Roadkill Customs Automotive Basics, Technical Info. ft. 8-12 lb. ft. It_s_Me. It probably began when aluminum cylinder heads first started showing up in mass-produced vehicles. A torque wrench is always recommended for tightening spark plugs and is an absolute must for an aluminum head. Spark plug gap for Points is .035 and any electronic or MSD is .040-.045 General Guideline- Pump gas street engines would use a -5 to -7 heat range, high compression race engines may use a -8 or -9 heat range, and boosted/nitrous engines may use a -9 or -10 heat range depending on levels of boost/nitrous. The proper torque of a spark plug can only be achieved using a torque wrench. Exhaust Manifold. Tighten all intake manifold bolts to within a range of 32 and 35 ft-lb of torque. Oct 29, 2017 #1. grubby65 Well-Known Member. Overtighten and you could damage the plug as well as the threads in the engine head. Spark plugs for the Chevy 350 engine are readily available from any auto parts store. 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. 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. got a 427. The cam is a 292 degree, 230 at .050 with .480 … Electrical & Ignition. Spark plugs. How To Helicoil Damaged Spark Plug Threads . 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. Intake Manifold. 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. 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. If a torque wrench is unavailable then you must take care not to overtighten spark plugs - particularly if refitting after cleaning. November 7, 2019 Roadkill Customs How To & DIY. Edelbrock says to run the Champion RC12YC (or equivalent) plug in their head (Performer RPM angle plug aluminum). Spark plugs for the 350 engine are on the sides of the engine, outside the cylinder heads. Messages: 161 Likes Received: 127. 07-24-05 08:17 AM - Post# 746594 Hey guys, Im tryin to help a guy out and I need a plug reccomendation. Tighten all cylinder head bolts to between 80 and 90 ft-lb of torque. Search Car Torque Specifications by Engine or Model. Engine Torque Specifications. The Edelbrock #60999 Performer RPM cylinder heads are designed for 1955-86 SB Chevy applications. ft. 12mm: 10-18 lb. I use Champion race plugs because I dont want a resistor. Also, is there a shorty spark plug that will work if there is interference with the header pipe? Torque sequence for big block aluminum heads Special considerations. 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. These Offy flathead Ford heads are finned for high heat dissipation, bigger water capacity for "built" engines and everybody knows, nothing beats a full-dress flathead for beauty! I have relatively mild street 400/500 stroker motor. 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 . Aluminum heads require parallel ground hardened … Spark plug gap. Screw in the spark plug finger tight until the gasket meets the cylinder head. Nobody wants damaged threads in a cylinder head or half a spark plug frozen in place. Of course, you should only install spark plugs in a cool engine, because metal expands when its hot and installation may prove difficult. Post: spark plugs for world product heads? Motors or what ever you might lovingly call the motor. Skip to the end of the images gallery. I run a bigblock with GMPP aluminum heads. A well designed spark plug might be made of an alloy that reduced galvanic corrosion but it's unlikely to eliminate it altogether. This assures easy removal of the spark plug and prevents corrosion and seizing. Torque Specifications 10mm Gasket Seat 12mm Gasket Seat NOTE: Spark plugs should be installed with clean and dry threads to avoid over-torqueing. I found a bunch of Bosch and Denso stuff that fits. Tighten each of the 390's spark plugs to between 15 and 20 ft-lb of torque. The best torque wrench to get is the kind with the "twist" adjustment because you can't overtighten with these. October 26, 2018, 8:22pm #7. Too loose and the engine won't run properly. Another area that can be problematic is thermostat housing bolts on old iron manifolds due to rust. These large engine parts benefited from their aluminum construction and shed around 100 pounds from the vehicles total weight. Spark Plugs. Unfortunately, the potential for problems increases when high mileage spark plugs are left untouched in relatively soft aluminum cylinder heads. 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. See ignition manufacturer recommendations to determine spark plug gap. eroded aluminum in the water area just go slow when tightening bolts and always run a tap in any suspect threads. For this reason, the 390's factory torque specifications should be followed. Big Block Chevrolet Head Bolt Torque Sequence. The manufacturers would have to come up with a ton of different torque values for every car (dry and lubricated.) Aluminum heads use gaskets that are seat-style long reach, whereas iron heads have a tapered seat-style and short reach spark plugs. 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. How To & DIY. Bored&Stroked. Understanding Aluminum Heads and Spark Plugs . This is the Head Bolt Torque Sequence (Pattern) for the Mark IV Big Blocks, Rat . Way too much! Eight spark plugs are required to keep the engine running smoothly. Depending on the year of the engine, the spark plugs may stick straight out or set at a 35-degree angle. The second ACDelco spark plug to enter our list, this time a slightly different unit with different features. Aluminum sacrifices to just about every other metal (except maybe zinc and magnesium). SHARE POST #29. 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. Another EZ Read reference. Using anti-seize on spark plugs installed in aluminum cylinder heads was very common as the steel shells would seize in the aluminum. As said many . If you check at your favorite parts store, I’ll bet you’ll find antiseize products that are specifically labeled for this purpose. Clean the spark plug threads and ensure the cylinder head is clean of debris. EZ Read simple diagram of the Big Block Chevy Cylinder Head Torque Sequence. Spark Plug Gap. I’ve never torqued them either Champion Auto Parts | Replacement & Aftermarket Auto Parts. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. I am an old timer and had a 1969 SS 396 that subsequently . Listed under Extras and some specific car models, RockAuto … 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. 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. ALUMINUM HEADS; SPARK PLUG THREAD SIZE: WITH TORQUE WRENCH: WITH TORQUE WRENCH: GASKET TYPE: 10mm: 8-12 lb. V4, Jul 14, 2009. As a result, the firing end of the spark plug can overheat and pre-ignition can occur. Important: Apply anti-seize to all spark plugs to ensure a long thread life. They are made of aluminum to insure they will transfer heat from the spark plug the same as original. No longer necessary as modern spark plug coatings work as a releasing agent and should be installed dry. Cars built 10 years ago already started using aluminum cylinder heads. $829.50. Over 6,000 Automotive Torque Specs. Whether the plugs are steel or some other hard alloy, the aluminum heads are likely to sacrifice to the plugs. They use the .750"reach(long thread) gasket seat plug and need the smaller 5/8" head for a socket to fit on. User Info. Spark Plug Torque Specifications: Attention: 1. Unfortunately, the spark plug that screws into the threaded hole that allows the electrode to spark combustion has an outer shell constructed of steel. 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 … Be the first to review this product. In this video, Steve Darnell from WelderUp shows … Spark Plug seizure in an aluminum cylinder head is usually caused by improper installation and too much torque. Qty. 2. Joined: Jan 14, 2005 Posts: 4,107. Then tighten the plug as specified below: With a Torque Wrench: Please note there are slight variations in torqueing recommendations between spark plug manufacturers. 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