compression test 4.3 l vortec|4.3L Compression Test Truck Sluggish : distributors Convert compression ratio to compression by taking the compression ratio number (say 9:1) and multiplying 9 x 14.7psi (atmospheric pressure) and you got your theoretical . Touro. Gêmeos. Câncer. Leão. Virgem. Libra. Escorpião. Sa.
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I'll perform a compression test on my 4.3 V6 CSFI equipped S10, and want to know whats the ideal compression reading. I'll use the . Testing the engine compression on your 4.3L or 5.0L or 5.7L GM equipped vehicle is not hard. In this article, I'll guide you every step of the way and I'll also show you how to interpret the results of the compression test. Convert compression ratio to compression by taking the compression ratio number (say 9:1) and multiplying 9 x 14.7psi (atmospheric pressure) and you got your theoretical .
I was able to check #6 and #4 cylinders for compression. #6 has 120 lbs, #4 has zero. Does the vortec v6 have known head problems? How about timing belt problems. In this tutorial, you'll learn how to test the engine compression and determine if an engine compression problem is causing an engine no-start or an engine performance problem .The idea behind the engine compression test (in the case of a misfire condition or rough idle condition) is to find out if any one engine cylinder is not contributing 100% of its power to the overall engine output.
Compression Test on 4.3L Chevy V-6. I would appreciate your interpretations of compression test results on a 1994 Chevy 4.3L V-6 that I am trying to decide if it is necessary .Aug 13, 2003. #2. Re: 4.3 l mercruiser vortec compression test. You're looking for Close Variations Between Cylinders, rather than a maximun/minimun #..10% differences is .
I thoroughly scrubbed the entire intake when I had it off for the gasket job. It has a rough idle and lots of misfiring at idle and low speed, but smooth at high speed. In a 5 minute . I brought the motor TDC using my compression gauge and visually watching #1 come to the top of the stroke. I pointed the rotor at the (6) mark on the distributor (this is not the #6 cylinder it is a mark that GM put on . I bought a 2000 S10 with 89k miles for my Grandson. After one month it barely runs. I was able to check #6 and #4 cylinders for compression. #6 has 120 lbs, #4 has zero. Does the vortec v6 have known head problems? How about timing belt problems. I don't know if I should pull the heads or just buy a rebuilt engine.
no compression #4 cylinder 4.3l v6
The whole spider injector system, spark plugs, wires, cap and rotor, ignition coil, crank sensor, timing chain and gears, throttle position sensor, and just recently the egr valve thinking the spring was worn out enough to where it would let to much exhaust in when fully warmed up. Fuel pressure, and compression both test good all around. The Vortec 4.3L engine is a dependable, potent engine made to be long-lasting and durable. The 4.3 Vortec engine is a V6 with 4.3 liters in displacement. The cylinder’s bore and stroke are each 4.0 inches. With a 9.2:1 . 1990 4.3L LX with 670 hours. D428255. Alpha 1 out drive. Troubleshooting a WOT issue and lack of power. Performed a compression test, #1 117 psi; #2 120 psi; #3 112 psi; #4 120 psi; #5 114 psi; #6 115 psi. Taking into consideration that my gauge seems to read 5 to 10 psi on the low side as. 2002 4.3L Vortec Timing. Jump to Latest . I brought the motor TDC using my compression gauge and visually watching #1 come to the top of the stroke. I pointed the rotor at the (6) mark on the distributor (this is not the #6 cylinder it is a mark that GM put on the distributor for timing.) . Shop called, VAC test was jumping around. #3 has a .
The engine was converted to an even-fire setup, matching that of the V8, with an external balancer. GM also began to advertise a new air/fuel mixing method using a 'vortex' inside the combustion chamber that it would brand 'Vortec.' Eventually, all of GM's truck motors would fall under the 'Vortec' banner that the 4.3 was introduced under.2005 Chevy Silverado 1500 4.3 liter V6. Changed distributor,plugs, wire’s, distributor cap, rotor and still get a multiple random misfire. Went with a aluminum shaft distributor and still get a multiple random misfire. In my opinion the Chevy 4.3 liter V6 is the biggest piece of junk maid.. CHEVROLET SHOULD HAVE LEFT THE MOTORS ALONE..
Page 21: Engine Compression Test Engine Marine/Industrial 4.3L 6-11 Base Engine Misfire Diagnosis (cont’d) Checks Action Abnormal Internal Engine Noises 1. Start the engine and determine if the noise is timed to the engine camshaft speed or the crankshaft speed. 2. Using a timing light, two knocks per flash is the crankshaft speed and one .
But are .020 short, compression ratio changes very little. Check the clearance between the rod pin end and inner piston pin boss when assembled. The rods don't ride in the center of the piston. . use the V6 '96-up Vortec heads- just like w/the V8. And like the V8 the same considerations about the intake and rocker arms apply- special intake . So just an update. I was curious how much difference a cold vs warm engine makes on the compression test, so yesterday after the engine was warm, I pulled a plug from each side of the motor (the middle ones that are easy to get to). Checked the compression on those two cylinders - 155lb on both, in my case the difference between hot and cold .Vortec is a trademarked name for a line of gasoline engines for General Motors trucks.The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber, creating a better air / fuel atomization. [1] It has since been used on a wide range of engines. Modern Vortec engines are named for their .
How do I diagnose the issue with my 4.3 Vortec engine? Begin by checking the basics, such as the fuel level and the battery’s charge. Next, test the fuel pressure, spark, compression, and engine timing. A diagnostic scan tool may also help identify any issues with sensors or the engine control module. How do I test the fuel system? Only the second generation of Vortec’s have variable valve timing (VVT), which aids fuel economy and broadens the power band. All 5.3 engines use electronic fuel injection and have a 1-8-7-2-6-5-4-3 firing order. Depending on the application, the first generation makes 270–310 horsepower and 315–335lb-ft of torque.
As for knowing whether your 4.3 is a Vortec or not, the true Vortec came out in the mid to late nineties. The older 4.3 heads have a bean shaped valve shroud, and the Vortec has a more kidney shaped valve shroud. It allows for less displacement which in turn allows for more compression. In a 5 minute compression test, cylinder #4 is at 130psi, cylinder #2 (it's neighbor) is at 180psi. I figure 130 is still pretty high, and within the 70% tolerance if 180 is the highest, although this was a rushed man's comp test. . D4M, I haven't taken the valve covers off yet. It's a vortec, and there's a bunch of junk over them that I don .
Need help with a 4.3 compression issue
the summer season is over and Ive decided to do a compression test on my engine. Here are the results, what do you think? Warm engine, WOT, DRY TEST: #6 - 170 psi #5 - 145-148 psi #4 - 175 psi #3 - 175 psi #2 - 178 psi #1 - 170 psi I did WET test on #5 (added 5ml - tea spoon of 25W40) and #5 jumped to 162, 165 psi. Here are the plugs:A compression test is simple to learn and only requires a few basic tools. From a mechanical perspective, you will need to know how to properly remove the spark plugs on the vehicle or equipment you are testing and properly disable . Compression Testing and What You Can Learn From It - EricTheCarGuyHere is a video on performing a compression test on an engine to assess it's mechanical con. The 4.2 Vortec received a Ward’s 10 Best Engines award for 4 years in a row in the early 2000’s. Despite these awards, it did suffer from common problems such as fan clutch failure, worn valve seats, issues with the cooling system, sway bar end links, and cylinder sleeves.
Re: replace 4.3 in kind or upgrade to vortec with ramifications/problems? Thanks for the responses, But Engineguy.com sells a marinized 4.3L V6 engine with casting # 12600234, see here: 2007-2011 262 / 4.3 Liter OMC, MerCruiser, Volvo Marine MARINE ENGINE ATKDMX1 EngineGuy So this casting works in a marine application. Throughout the decades that followed its inception, the Chevy 4.3L V6 — also called the Vortec 4.3 or Vortec 4300 — saw a series of changes to improve power output and efficiency and address . My Blazer is a 1992 with a Vortec CPI injected 4.3L with 187,000mi. . it to the best of my knowledge. I used a test light to ground the plug wires out at the top of the distributor cap one by one. When I got to #2, the idle didnt change much. I checked the spark, and it was very healthy. I ran a compression test, and got 90psi out of it. Not .
A cylinder leak test would be the next step, as that would be more revealing than a compression test. A. ArizonaGuy Recruit. Joined Sep 21, 2012 Messages 2. Sep 21, 2012 #4 Re: 4.3L Mercruiser Compression question I read somewhere that even readings on one-sided a bit off from the other is likely to be machining variances after an overhaul. And . Combined with stock heads that Dougan's checked at 68cc chambers, pistons that we set at an average of 0.010 below deck, and Fel-Pro head gaskets with 0.041 compressed thickness, the V-6 would . 4.3L V6 engines have some of the most common issues that lead to misfiring, despite their rock-solid performance. You must be well-versed in these matters pertaining to the 4.3L Vortec engine before obtaining it. Starting to troubleshoot your 4.3 Vortec engine Problems can be a confusing and empowering experience all at once. checked compression 150psi seems low to me fuel pressure 12psi still runs way too rich and has low vacuum. . Compression test good + low vacuum = leak in the intake. the 4.3's are known to blow gaskets. Save Share Reply Quote Like. P. patchettdestruction Discussion starter 128 posts
The ‘96- early ‘99 Vortec’s have the same fuel lines as the ‘87-’95 TBI’s. The point here is that the Vortec pump works perfectly with any TBI engine from ‘87-’95 better than if you were to get a TBI pump. The regulators take care of the pressure differences. The Vortec pumps are better at higher volume delivery rates.
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compression test 4.3 l vortec|4.3L Compression Test Truck Sluggish