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#1
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Valve guide question
Okay guys, I pulled the engine on the 3165 to pull the tins and check for cooling issues and figured it would be a good time to adjust the valves if needed. That's where the fun started. I noticed on the #1 cylinder (opposite the oil filter) the valve push rod was bending each time it would lift the valve. It looks like the valve guide started backing out of the head and limiting the valve movement causing the push rod to bend.
What do I need to do at this point? I'm thinking if I push it back in it will work its way back out and if I replace it, will the new one do the same. Looks like a quick search on a new head is a little over $200. I'm not sure what it would cost if I take it to a machine shop to have them repair it but I'm thinking that would be at least $100. Here you can see the guide on the left is backing out. DSCN1255.jpg
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This ain't no hobby....it's an addiction |
#2
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Todd
Had the same issue with the engine that came out of that 1641 I bought from Earl AKA DaDuke. I just pressed it back it, cleaned the crud off the valves and replaced the bent pushrods. The engine is now in my pressure washer. So far it's been running fine. Think it pushed the guide up because it got hot. Engine had so many things screwed up on it I'm surprised it even ran. I'm not suggesting that you do what I did on one that will be worked hard.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL |
#3
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Wow, those rods are bent! Should I use some type of retaining compound like loctite or just push them back in?
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This ain't no hobby....it's an addiction |
#4
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If it was me I'd check with a machine shop about putting in some knurled valve guides in those heads if someone makes them. Don't think Loc-Tite will work with the heat.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL |
#5
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You can use sleeve retainer lock-tite. It's made for dry sleeved motors. But, I'm with Sam, if you going to use it hard, then I'd get another head. Been my experience with any aluminum head that once the guide comes out, they generally won't stay put. I guess you can try sleeve retainer and knurling it (good idea Sam).... if it doesn't work you'll be back where you are now.
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#6
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Well, I'm selling this tractor and I hate to dump more money into it but I don't want to sell someone a ticking time bomb either. I did some searching and I tried Pats Small Engine Plus for parts. I ordered a new head, push rod, front and rear seals, exhaust gasket, (4) head bolts and a new starter gear for a total of about $250 shipped. I called a local machine shop that works on small engines but they said i would be better off replacing it...I kinda figured that was what they were going to say. Now me and the dog gotta look for the big brown truck.
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This ain't no hobby....it's an addiction |
#7
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Quote:
Is your 16 Vanguard still running on that shade tree fix? I picked up a low hour 1641 a couple days ago and it had a guide that had slipped up and bent the pushrod. I hammered it back down and straigtened the pushrod and it is now going up and down like it's supposed to. I haven't gotten the engine hot yet so I don't know if it will last or not. Didn't figure I had much to lose. I just wondered how yours came out? |
#8
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Mike
So far no problems but it is now in a low stress application and get's little use. I installed it in my pressure washer that had an 8HP Tecumseh engine. At least it's easier to start than the Tecumseh was.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL |
#9
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Thanks, just checking. I fired the engine up while ago and the rockers are rockin' and boppin' just like they're supposed to. Engine doesn't knock or smoke so I think I'll leave it be and see what happens.
Your comment about overheating. When the engine fired, part of a mouse house blew out of the shrouding so it's very possible things are plugged around the cooling fins. |
#10
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Over heating will do it.
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2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL |
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