1970 190xt
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=41608
Printed Date: 31 Aug 2025 at 4:19pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 1970 190xt
Posted By: schwanman66
Subject: 1970 190xt
Date Posted: 04 Dec 2011 at 9:34pm
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Hello everyone! I just joined the site and have enjoyed all the useful information on working on my 190 allis. I have a few questions on mine. I bought this 190 about 3 months ago and have been working out a few issues. The motor sounds as though it has a miss and I'm not sure what route to go. I think at times it sounds like a tick in the exhaust not running. I already had the injectors rebuilt and the motor has cleaned up some, but in almost seems as though there's still a slight miss and the exhaust smoke seems to be more then needed (burns your eyes in a building). I'm thinking the head may need rebuilt, but wanting your opinions. Yesterday I ran it for awhile, and after shutting it down for the day I noticed black liquid coming out the exhaust manifold where the bolts had loosened up from the head. Could also smell fuel. The engine does have some blow-by, and do notice a drop of oil out of the tube occasionally. I don't notice any change in fluid levels of antifreeze or oil. What are your thoughts?
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Replies:
Posted By: schwanman66
Date Posted: 04 Dec 2011 at 9:42pm
Posted By: DougS
Date Posted: 04 Dec 2011 at 9:46pm
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Black liquid is probably unburned diesel fuel. With blow by, there's a chance the one cylinder my not have enough compression. It could be a stuck valve too. Do you know how many hours the engine has on it? There are rebuild kits available for a 301 engine, but there comes a time when you may need to tools to measure things like crankshaft wear. It comes down to the big question: What do you want this tractor to become? Show tractor or working tractor?
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Posted By: schwanman66
Date Posted: 04 Dec 2011 at 9:54pm
I'm wanting a good loader tractor for chores. The engine has been rebuilt before back in the late 90's. Unsure of real hours I've put roughly 20 hrs on it with no oil use so far. Could the valves be out of adjustment enough to cause this "miss"? If I were to remove injectors and push compressed air down each cylinder with the valves closed I should be able to determine where the leak would be right? I'm guessing exhaust valved take most of the punishment on diesels.
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Posted By: DougS
Date Posted: 04 Dec 2011 at 10:03pm
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What else is wrong with the tractor? Hydraulics good? Pumps are not cheap. Drive train ok? Clutches, power director, rear end repairs just keep inching the cost of repairs higher. If I had an otherwise good tractor, I would rebuild the engine. This assumes that you have enough of a shop and tools to do the basic parts of the rebuild yourself. You need a good hoist, for starters. An engine stand would be needed too. Expect to need to send the crankshaft out for regrinding. You say the engine was rebuilt in the late '90s. It should still be ok if that rebuild was done right. If it was only an in-frame rebuild, you really don't know what you'll find when you open the engine up. Edit: You can pull the head and look. That will tell you more about the valves than anything. You could get a look at the head gasket as well.
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Posted By: schwanman66
Date Posted: 04 Dec 2011 at 10:08pm
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Nothing else wrong with tractor, has a westendorf TA-26 loader, hydraulics are strong, does not jump out of any gears, clutch and PD work great. Rear end seems tight so far. I do have a good shop to work on it with everything to remove the engine, just didn't want to if not necessary.
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Posted By: injpumpEd
Date Posted: 05 Dec 2011 at 10:10am
remove valve cover and check valve adjustments. sounds like a exhaust valve with not enough lash on rocker, therefore holding it open slightly.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: Eric[IL]
Date Posted: 05 Dec 2011 at 10:36am
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It could be an engine malfunction, but you may want try the simple things first?
Check your fuel system, especially for water contamination. If you are like me, purchasing good diesel fuel is becoming a task or art. Several local distributors of fuel had their supply infested with water. Also, if your tractor has been stored a long time without continuous use or proper maintenance, it most likely will contain water from condensation. Start with your fuel tank and proceed through the fuel lines, fuel filters, ect.... I had black fluid coming out of my diesel tractor's exhaust, it was low on engine power, & knocked also. I took it to my dealership. After $1400 in repairs, they siphoned over 3 gallon of water out of its fuel system. Water is not nice on fuel components.
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Posted By: schwanman66
Date Posted: 05 Dec 2011 at 11:56am
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I did empty and clean both sediment bowls, changed fuel filter etc thinking it could be contamination. As to good quality diesel fuel, you could be right as I get if from the local coop and there have been problems with water in the past. I also replaced the primer pump to be on the safe side since they tend to leak. The only fuel leakage on the entire tractor is a high pressure line at the injection pump on the bottom line. Figured I'd replace the washers. I didn't figure a drip from that line would effect any of my problems currently, maybe I'm wrong. I think I'll pull the valve cover off this week and see what the current valve settings are and correct them.
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Posted By: schwanman66
Date Posted: 05 Dec 2011 at 11:59am
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and to clear the first statement, the noise from the exhaust does sound more like a popping sound then a tick. not the nice diesel tone I'm used to steady and consistant.
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Posted By: Joe(TX)
Date Posted: 06 Dec 2011 at 9:07pm
Sounds like a valve problem to me.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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Posted By: Orange Blood
Date Posted: 06 Dec 2011 at 9:36pm
First thing I would do before tearing into anything is a compression check. That way you know what hole to be investigation. It very well could be a valvetrain issue, as others have pointed out. It could be couple of broken rings on one piston, you mentioned a tick.... It is going to take a bit of time to figure this one out, but you will get there. You are correct in using compressed air to find what is leaking, they make a leakdown test kit, not sure if it has adapters for an allis 301 or not, but I will look into that if you like. Kit really isn't all that expensive, and it is a good tool to have around.
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Posted By: schwanman66
Date Posted: 07 Dec 2011 at 7:47am
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I appreciate all the help! I think its a valve problem also. I've never adjusted the valves yet, so I figure I'd get them adjusted this week or weekend. I think a compression check needs done as well.
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Posted By: bill2260
Date Posted: 07 Dec 2011 at 7:54am
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Sounds like you had the injectors out. When replacing mine after overhaul mechanic forgot to put washers on bolts that hold in one of the injectors and it didn't seal properly. Engine missed and clicked when miwssing and that is all it was. Check that before digging too deep. Bill
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Posted By: AllisFreak MN
Date Posted: 07 Dec 2011 at 8:21pm
Welcome to the forum schwanman66!
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'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2
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Posted By: schwanman66
Date Posted: 31 Dec 2011 at 6:45am
update-after doing a compression test and leak-down test, I found I have 2 intake valves not seating correctly. Pulled the head having it rebuilt. compression over the engine was average of 340 psi excluding the 2 cylinders with intake valve problems. What psi is normal on a 301 diesel?
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1970 & 1971 190xt Series III's & 160
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