jeep cj5 360 compression test|Compression Testing the Willys Engine : wholesaling For those who are unfamiliar with compression tests, you remove the spark plugs, disconnect the coil wire, screw a compression gauge into a sparkplug hole and crank .
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If you suspect rings that are worn (or much else for that matter), the only true test that doesn't waste your time and will give you accurate answers is a leak-down test. Do some research, Google "cylinder leakdown test" and learn a bit more about it. There are commercial test kits that can check your antifreeze for combustion leakage using chemicals if you want to pin down the problem more. Hopefully all your .
To check your valves, you really need a vacuum gage. A compression gage captures compression. You did not specify how you did a leak down test and the results can . I'm going to do a compression test tomorrow on my AMC 360. Does anyone know what some good numbers would be? ThanksYou'll hear a sudden rise in pitch of the starter motor for a fraction of a second as the leaky piston is on its compression stroke: ra-ra-ra-ra-RAH-ra-ra-ra... This this is because the starter is . For those who are unfamiliar with compression tests, you remove the spark plugs, disconnect the coil wire, screw a compression gauge into a sparkplug hole and crank .
I NEED HELP with these Compression Test Results
How do I Perform a Compression Test on CJ?
A full, complete tune up is needed and a carb rebuild is called for. May be multiple problems. Just a little carbon tracking on a cap, rotor or plug insulator will do the backfire, as .
Who has some cylinder compression numbers on a rebuilt dauntless motor? What about someone who's got 20-30k miles on a rebuild? Over 100k miles? I'm looking for . You can test the condition of your rings by comparing a wet and dry compression test. Do the regular compression test and write down all the readings in your notebook. Then .
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After dribbling the question of swapping out my AMC 304 for a 360 I made the decision to make the change. But while getting ready to remove my AMC 304 I decided to do a . I just picked up a nice 79 CJ5 with a 304 in it. the motor smokes a bit, was thinking maybe bad valve seals. . A good compression test 1) is relatively even for all cylinders (say, +/- 10% for all cylinders), 2) does not change much between wet and dry, and 3) has a compression reading somewhere near the factory spec for all the cylinders . I failed to mention that a compression test is the very first thing to do. This will rule out some problems if good . My '71 comp. ran 165# all cylinders.mike [SIGPIC][/SIGPIC]Member of Salem Jeep Club / PNW4WDA . -1975 Jeep CJ5, 360 V8, Headers, Duel Exhaust,T15 transmission, D-20 Transfer case, Twin Stick Conversion, Warn . So, I did a compression test this morning and got the following: Cyl 1. Home. What's new Latest activity Authors. Wiki. Pages Latest activity. . 1986 Jeep CJ Mostly stock, 258 c.i.d., T-176 tranny, Dana 30 front, AMC 20 rear, Dana 300 t-case, 31x10.50 tires, 2 inch body lift . 1978 Jeep CJ7 / 5.3L Vortec LM7 V8 / T-18B Transmission / Dana .
Compression test
Doing a compression test on an engine that has been sitting a while is always a little gamey. Did you force open the choke and throttle plate? Fluttering as you crank can cause a difference. How much oil you put onto dry rings can make a difference too. So can a little wisp of carbon on a valve. End story, I'd run the sucker. If you think you have compression problems charge your battery up and run a compression check on all cylinders. If you don't have a gauge you can buy one at the parts store for - or so. You can look up what the compression is supposed to be in either a Haynes manual on the web somewhere. Jeep CJ Forum 304 Compression Test. Jump to Latest . How do you bump start it to check compression? The Jeep has no wiring. Attachments. IMG_1856.jpeg. 2.1 MB Views: 467. IMG_1858.jpeg. . Did you bench test the starter to make sure the bendix is pushing the gear out? 80 CJ5, 350 SBC Snipered, SM465, D300 twin stick, D30 tierod flip, AMC20 . Jeep CJ Forum AMC 360 Compression? Jump to Latest . I'm going to do a compression test tomorrow on my AMC 360. Does anyone know what some good numbers would be? Thanks . A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting .
I need to run a compression test on my 258, so today I was searching for acceptable values from a test. . So for a brand new Jeep AMC 258 i6 / 4.2l, we should expect a compression pressure of 9.2 X 17 for a pressure of 155 . Jeep-CJ.com is the first and largest CJ community with forums, galleries, files and more. Navigation. We found a fast solution for that too when the Jeep guys divulged the secret of the AMC 360. No, it's not a Mopar engine, it's all American Motors with a 4.08 bore and 3.44-inch stroke destined for the big-body Javelin, 360 Hornet, and a healthy mix of Wagoneers and other vehicles with a production run from 1970 to 1991 (or 1992 depending on . Another Compression Test Question Old Dog Always Off-Roading Jeeper. Posts 13,886 Media 82 . 1986 Jeep CJ Mostly stock, 258 c.i.d., T-176 tranny, Dana 30 front, AMC 20 rear, Dana 300 t-case, 31x10.50 tires, 2 inch body lift . And yes, it is rubber. It's my understanding that Jeep did not use a metal line between the fuel pump and carburetor .
Posts 13,886 Media 82 Thanks 5 Location Stonelick Lake, Ohio Vehicle(s) 83 CJ7 350 tbi, TH350, D300 twin sticked & clocked, narrowed Chief D44 Eaton Elocker & Moser shafts, Explorer 8.8 Detroit locker, 410's, RE 4.5" spring lift 1" body lift, 35" Claws, cage tied to frame, Corbeau baja seats, HD tie rod and draglink, u-bolts flipped, custom skid plate and sliders, . Posts 866 Media 20 Resources 1 Solutions 18 Thanks 439 Location Cut-n-Shoot, TX Vehicle(s) 1984 CJ7, 420 HP "ZZ6 EFI" Crate engine, 700R4, D300, Dana30 front, Dana489 rear, 4.56 gears, 4" lift
Compression Testing the Willys Engine
Hello Jeep-CJ Forums! I am a long time reader, first time poster. . My 84 Jeep CJ7 with AMC 258 i6 / 4.2l /MPFI at about 203k miles is losing oil, presumably from blow-by. I see pools around the oil filler cap, ccv and around the valve cover gasket. . My assumption based on the compression test results and plug reading is that there is .
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-1975 Jeep CJ5, 360 V8, Headers, Duel Exhaust,T15 transmission, D-20 Transfer case, Twin Stick Conversion, Warn 8274 Winch -1951 Willys Wagon, 4 cylinder, "F" head, little rust, very close to stock Dec 28, 2015Continuing the discovery of all that needs repairing on our new Jeep acquisition, I do a compression test on the AMC 232 inline 6 cylinder engine, change the.
Quote Reply Topic: 1973 AMC 360 compression test Posted: Jan/11/2015 at 9:35pm . 73 CJ5 Sold 81 CJ5 Renegade 91 YJ 69 ambassador 390 . Members Profile. Send Private Message. Find Members Posts. Add to Buddy List. Supporter of TheAMCForum Joined: Nov/22/2009 Location: Peoria, AZ Status: Offline
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Looked in my Jeep factory technical manual and it said 140 minimum. Rule of thumb is 140-160 and no less than 10% variance. Even if the compression is less than 140, if they are within 10% all should be OK as long as they are at least 120 or so and you are not blowing oil or smoke. My 304 reads from 130-141, but all is well and it runs fine. Jim Compression test was run for 3 compression strokes. The FSM specifies three compression strokes so the 120-150 psi compression spec is probably based on this. You might try doing another test with a fully charged battery, the carb blocked open and watching the gauge for 3 compression strokes and see what you end up with. The 304/360/401 swaps need pretty much the same things, since the blocks are all essentially the same. If you have some exhaust manifolds that come with the 360, you can use those and graft in a factory-style V8 exhaust, unless you want dual exhaust, then just adapt the driver side exhaust to the driver side manifold, then run a new line out the back on the .
I'm not sure on the compression test. It's not a bad idea. It would be one more thing to eliminate. mtnwhlr Always Off-Roading Jeeper. Lifetime Supporter. Posts 11,554 Media 57 Thanks 11 . -1975 Jeep CJ5, 360 V8, Headers, Duel Exhaust,T15 transmission, D-20 Transfer case, Twin Stick Conversion, Warn 8274 Winch .
360 AMC Engine. 35x12.50x15 TSL Super Swamper tires. In a frame off rebuild for a long time. May 16, 2010 . Compression in the cylinder, as fuel is introduced fuel to burn, introduced at the proper time, in the right amount. . Jeep-CJ.com is the first and largest CJ community with forums, galleries, files and more. Navigation. Dont hold me to it .. but I think the only way you can check is to do a compression test... 1976 CJ5 - 232 I6, MC2100, YJ Booster, Front disc conv, 2.5" BDS, 1" Body Lift, .5" lift Daystar Shackles, 33 x 10.50 BF KM2, Twin Stick So I've got a 1979 jeep cj5 with an AMC 360. It currently has an Edelbrock intake with a Holley 80457-2 4 barrel carb. I don't do any mudding but do like to hit a trail occasionally. The jeep is mainly kept on the road just joy riding. The problem is the inclines / declines cause the jeep to choke out and stall. What should compression be per cylinder for a Compression test on a 4 cylinder 2.5L? I did a test, and got the results on 125-6 on 3 of them and 120 on the last. . A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance .
I ran compression tests on the #2, #4, #6 and #8 cylinders and #4 is reading 50 PSI after repeated compression tests performed with both a hot and cold engine, while the other three cylinders are still putting up strong compression numbers around 140 PSI. When I first got this jeep about 3 1/2 years ago this same cylinder tested at 137 PSI. Currie Rock Jock 60 high-pinion front and rear ends have 5.13 gears, Eaton Detroit Lockers, and strong Wilwood disc brakes front and rear. The front Rock Jock features Currie's aluminum knuckles.
Another Compression Test Question Old Dog Always Off-Roading Jeeper. Posts 13,886 Media 82 Thanks 5 . 1986 Jeep CJ Mostly stock, 258 c.i.d., T-176 tranny, Dana 30 front, AMC 20 rear, Dana 300 t-case, 31x10.50 tires, 2 inch body lift . 1978 Jeep CJ7 / 5.3L Vortec LM7 V8 / T-18B Transmission / Dana 20 Transfer Case / Dana 30/AMC 20.
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jeep cj5 360 compression test|Compression Testing the Willys Engine