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Allis 185 Injectors
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McGatha185 View Drop Down
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Joined: 10 Nov 2016
Location: Missouri
Points: 48 		Post Options Post Options   Thanks (0) Thanks(0)   Quote McGatha185 Quote  Post ReplyReply Direct Link To This Post Topic: Allis 185 Injectors
    Posted: 03 Jan 2017 at 7:58am
I plan on pulling and cleaning the injectors on my Allis 185 before I reinstall the pump. Any tips or suggestions would be most appreciated. Also what would be the best way to clean these after I have them out?
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
Points: 3497 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2017 at 6:10pm
have them pop tested, if they all pop at about the same pressure and atomize fine I would leave them alone.  Never put the tip on a wire brush.  To lap and clean is somewhat counter productive, have the tip replaced or have an injection service do it.  The holes are so small and the unit so old a tip cleaner will not unstop the plugs. Plus the hole will have  erosion and probably will prevent proper atomization .  Be careful about raising the popping pressure above 3000 psi  as a worn head will not pop them at slow cranking speed.  Everyone has standards to go by - and live with - your budget is the key, but running an engine with a faulty tip will lead to a burnt piston eventually. 
When told "it's not the money,it's the principle", remember, it's always the money..
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WF owner View Drop Down
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Joined: 12 May 2013
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Points: 4935 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2017 at 7:53pm
Originally posted by tbran tbran wrote:

...  Everyone has standards to go by - and live with - your budget is the key, but running an engine with a faulty tip will lead to a burnt piston eventually. 


The bill for the burned piston in the 7000 I had was around $2400 (+/-) in the early 90's and I did all the labor myself.

After new sleeves, pistons, rings, gaskets, machine work, etc., I still had to have the injectors tested. Four out of six were bad and one was marginal. I ended up buying a complete set. I hadn't even heard of the internet then, so I ended up paying the dealers price.
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