180 smoke and miss
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=175060
Printed Date: 13 May 2025 at 10:08am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 180 smoke and miss
Posted By: marzer
Subject: 180 smoke and miss
Date Posted: 10 Oct 2020 at 9:55am
| My 180 smokes gray with a miss. When #4 line is loosened the smoke goes away. We pulled the injector and had it tested by a local diesel injection shop. The old boy running the shop said it tested ok. The pump was rebuild before I bought the tractor but I don't know how long before. The smoke occurs throughout the rpm range. It has smoked for the two plus years I have owned it. Any help determining what is wrong would be appreciated. |
Replies:
Posted By: Clay
Date Posted: 10 Oct 2020 at 10:24am
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Are you loosing any coolant? Any bubbles in your radiator? |
Posted By: marzer
Date Posted: 10 Oct 2020 at 10:41am
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No bubbles or coolant loss. |
Posted By: Amos
Date Posted: 10 Oct 2020 at 2:11pm
| Low compression...maybe a valve or a sleeve/piston/ring issue...or cracked head... |
Posted By: Boss Man
Date Posted: 10 Oct 2020 at 3:35pm
| I would do a compression test and check valve lash. |
Posted By: DrAllis
Date Posted: 10 Oct 2020 at 5:23pm
| Swap that injector with any of the other ones. If the smoke is still there and goes away when you loosen #4 injector line, you have a compression problem on that #4 cylinder. |
Posted By: FREEDGUY
Date Posted: 10 Oct 2020 at 6:58pm
I've seen posts about "valve lash". I just can't wrap my head around why the valves are more of an issue vrs. cylinder rings/ head gasket issues ??
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Boss Man wrote:Posted By: ksbowman
Date Posted: 10 Oct 2020 at 7:23pm
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Posted By: FREEDGUY
Date Posted: 10 Oct 2020 at 7:58pm
Thanks Kman  , makes some sense 
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Posted By: Boss Man
Date Posted: 10 Oct 2020 at 8:34pm
| Valve lash can go 1 of 2 ways. To tight and valves may not close completely causing compression lose and eventual burning of the valve. To loose and they aren't fully opening there fore restricting fresh combustion air coming in or not allowing all exhaust gas's out causing the cylinder not to have enough clean air to burn the fuel charge. |
Posted By: marzer
Date Posted: 12 Oct 2020 at 5:35am
| Thanks for the replies. I adjusted the valves last winter when I repaired the valve cover leak. I was planning on doing the injector swap. The pump shop guy said to check the pump timing and if the flex ring going the pump will do some weird .... stuff. I will swap injectors and see where that takes me. |
Posted By: DrAllis
Date Posted: 12 Oct 2020 at 7:28am
| Generally, when there is a serious compression loss problem on ONE cylinder, a trained ear can hear that when cranking with the starter. |
Posted By: marzer
Date Posted: 12 Oct 2020 at 9:14am
| I will swap injectors and I will listen for something strange in the exhaust. The engine has very little if any blow by. Hard to believe compression is going past the rings but who knows. I will keep digging. Thanks. |
Posted By: Brian Jasper co. Ia
Date Posted: 12 Oct 2020 at 11:35pm
^^THIS^^ ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: marzer
Date Posted: 18 Nov 2020 at 7:28am
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I finally had a chance to run a compression test on the 180. I plugged in the block heater a few hours before I started to warm up the engine. Cylinders 2-5 were all 330 psi. 6 was 340 and 1 was 370. I don't know why 1 is soo much higher. I still need to check the pump timing and will do the injector swap when I put it back together. Starting to be a head scratcher. |
Posted By: injpumpEd
Date Posted: 18 Nov 2020 at 7:50am
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The injector may have "tested ok" but is it really ok? I've seen many times where they seem to work ok, but once I take them apart to inspect internal parts, I find problems. He should have taken it apart too. You may discover the injector is at fault eventually when you swap it with another cylinder. I can't imagine the pump causing this one cylinder issue, even when flex ring fails, they will miss random cylinders, never seen just one. ------------- 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! |
Posted By: marzer
Date Posted: 18 Nov 2020 at 8:20am
| Sounds like the injector cylinder swap should point me in the right direction. |
Posted By: marzer
Date Posted: 26 May 2021 at 8:04am
| I've been tinkering with the 180 again trying to fix the high idle hunt issue. While aligning the timing marks in the pump I noticed rotational free play of the weight retainer. I'm curious if this would cause the ruff high idle. I have video but don't know how to post. Thanks |
Posted By: tbran
Date Posted: 27 May 2021 at 3:56pm
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180's were set to high idle at 2000 , above 2000 the timing was not advanced enough to prevent flutter on many. The 185 was 2200 and had the hydraulic advance to cure this - just a comment.... IF the 180 was set too 2400 most I have seen do 'flutter'. ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: DrAllis
Date Posted: 27 May 2021 at 9:23pm
| 3010 John Deere diesel does the same thing. Wide open throttle in road gear going downhill the engine flutters and as soon as there is some load put back on the engine, it goes away. If you can wiggle/move the governor weight retainer thru the timing window, I'd say it's probably time for a pump overhaul. |
Posted By: marzer
Date Posted: 28 May 2021 at 9:35am
| Looking at the pump drive shaft it appears the weight retainer has been wobbling for awhile. Probably need a new weight retainer when the seal kit goes in. |
Posted By: marzer
Date Posted: 03 Aug 2021 at 1:09pm
This explains a lot. 
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Posted By: marzer
Date Posted: 04 Aug 2021 at 7:35am
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Posted By: Red Bank
Date Posted: 04 Aug 2021 at 8:40am
| Am I looking at that right? The valves are in the wrong spot? |
Posted By: marzer
Date Posted: 04 Aug 2021 at 9:06am
| Yup. This was not an easy one to figure out. |
Posted By: DougG
Date Posted: 04 Aug 2021 at 6:23pm
| Oh my my my - interesting ! |
Posted By: Amos
Date Posted: 04 Aug 2021 at 6:50pm
| Now who the heck done that!!!!? |
Posted By: SteveM C/IL
Date Posted: 04 Aug 2021 at 9:07pm
| Rebuild head and pump and should out last you. (new valves) |
Posted By: marzer
Date Posted: 05 Aug 2021 at 5:21am
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The valves where contacting at the very top edges. I don't know how it ran so long without burning the valves. The plan is to clean everything up and check contact. If it had a valve job, the interference should be ok. |