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D17 camshaft bearings

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Doobletango View Drop Down
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Joined: 21 Jun 2020
Location: Illinois
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    Posted: 09 Aug 2020 at 9:20am
I’ve made several posts along the way of finding the knocking noise in my D17 Series 1 gas tractor.
It ended up being the #3 rod bearing.
I finally just pulled the engine, the crankshaft journal is work out of specs to use as is. When reading how to clean the journal during the early phase I came across mechanics saying to use muriatic acid to remove any aluminum while leaving the journal unharmed. They mentioned that it would cause the journal to rust. It I wasn’t worried since the engine would have oil in it again. Upon pulling the crankshaft though, I’m noticing a lot of surface rust in nearby areas. One of them being the camshaft. The loves I can clean, assuming they’ll be ok once lubed. My main concern is the cam bearings though. How much of an issue might this be? I’m a small engine guy with VERY limited bigger engine experience. I know I need to make sure the oil holes are lined up and to be very very careful when putting the cam back in. I’m just thinking that while I’m here, it might be a good idea to just toss a set of cam bearing in. Can anyone provide any insight?
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2020 at 5:03pm
Whenever you have one of those engines apart, they need new cam bearings. If you don't you'll be sorry. The result  of worn cam bearings is low oil pressure. There is no main oil galley in the block. The hollow camshaft is the main oil galley and if it leaks at the cam bearings you don't have good oil pressure. Don't sweat the oil holes too much. Get them as close as you can and Loctite the brgs so they don't spin. Run a proper size drill bit down thru the oil hole to make alignment perfect if you need to. Clean up/de-burr when done.
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Doobletango View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Doobletango Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2020 at 5:38pm
Which kind of loc-tite? I’m assuming red?
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2020 at 5:51pm
Any loctite is better than nothing.
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Doobletango View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Doobletango Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2020 at 6:00pm
Ok. Thanks for the input. 😁
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LeonR2013 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LeonR2013 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2020 at 10:06pm
Red will stand more heat.      Leon
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WF owner View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2020 at 6:56am
I'm going by memory here (so I might be right and I might not), but I believe cam bearings for a W-226 engine do not have a hole for the center bearing and the G-226 engine requires a hole.
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 12 Aug 2020 at 7:47am
There's two "G"-226 engines. The older ones use the same center cam brg as a WC-WD-WD45. The newer "full-flow" oil system uses a different center brg over the older.
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