CA air intake
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=157465
Printed Date: 23 Sep 2025 at 3:30pm
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Topic: CA air intake
Posted By: SD Allis
Subject: CA air intake
Date Posted: 21 Jan 2019 at 5:09pm
| I put the CA back together. and now the carburetor doesn't suck in air. Yes I cleaned the air cleaner, in fact I removed it, so I could push my palm up against the air intake side of the carburetor. No suction. Any thoughts? |
Replies:
Posted By: Chad(WI)
Date Posted: 21 Jan 2019 at 5:23pm
| My first thoughts are a rag or some other obstruction between the carb and intake assuming it was ok before you tore it down. |
Posted By: DiyDave
Date Posted: 21 Jan 2019 at 5:32pm
compression check is in order...
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Posted By: tbran
Date Posted: 21 Jan 2019 at 5:32pm
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valves setting or you have the cam out of time... ??? ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: Gerald J.
Date Posted: 21 Jan 2019 at 9:07pm
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Shop manual may help: http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf Gerald J. |
Posted By: Dick L
Date Posted: 22 Jan 2019 at 6:53am
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My first question to my self would be, What all has to happen in an engine to draw air into the cylinder chamber thru the carburetor? Knowing that will give a clue. When the pistons go down the chamber fills with air regardless where it might come from. Wanting it to come only thru the carburetor all other places air might come in then must be closed tight. I would then ask what is not closed tight check each one. The first would be fit of rings between the piston and cylinder walls. The second one would be head gasket sealing around the cylinders and the firing chamber. The third would be the exhaust valve being closed and sealing tight with the intake valve open. The fourth would be the manifold gasket sealing between the head and the manifold. The next question would be how to check these in the above order. Some has to be checked on assembly or before. The valves can checked for closing with the valve cover off and checking that two valves are closed with the flywheel on the TDC line. With out compression you will not find the compression stroke. However any time the flywheel is on TDC two pistons are on TDC and you can find one of them with both valve rocker arms in the total up position. Those two need to have the .010 to .012 space between the valve stem and the rocker arm. That will be true with each cylinder. The above is all well and good if the timing marks on the crankshaft and timing gear were not mixed up at assembly with the mark for the governor. 
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Posted By: DSeries4
Date Posted: 22 Jan 2019 at 4:08pm
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Did you put a new gasket on where the carb meets the intake manifold? If it's leaking, it could suck air at that point rather than at the carb itself. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |