Valve guide missing

4 Stroke Kart Engine Forum
1

Forgive me if this is fairly basic: Bought a used engine and opened up the valve cover to check and set the valve lash and noticed that there seemed to be a plastic ‘guide’ on the valve stem missing. The stem itself has a lot of play side to side because of it. Not sure if this is bad/maybe part of the design? Is it a part I can buy and install without much hassle?

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2

Here is a site or 2
https://www.fastech-racing.com/bs-1021-691343-briggs-lo206-push-rod-guide.html

https://www.accelerationkarting.com/animalheadassembly.html

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3

I think that’s actually normal from what I remember. I’ll take a look at mine tomorrow if nobody is able to confirm. It’s been 3or4 years since I’ve done the clearance anyway :joy:

4

Same problem here on memory. I see pics on the net with both valves having guides.

Don’t mean it’s correct: but here is a Briggs video

Seems if they didn’t want a guide on the one valve pushrod they would not make the plate accept a guide.

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5

That’s a your pushrod on valve. That plastic guide is nice to have but I don’t think it’s a big deal if it’s missing. Once it makes contact with that rocker arm it has enough pressure to hold it in place.

6

Maybe it’s more common on older spec briggs… This one is a silver tag from 2015. On a lot of videos it seems like newer engines have both guides.

7

Thanks, and yeah other vids it seems to always show two.

8

https://cometkartsales.com/Briggs-Animal-Head-and-Valve-Train-Parts/

Bottom of the page part #1034 push rod guide is what you’re looking for.

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9

I will check mine next time I am near it.

I would say it is not entirely needed, but don’t truly know. Might be a DQ if it is not - that would be a bigger concern for me - not that I am a podium finisher . . . .

I was crew chief for a group of guys. one switched his pushrods to CF on a Lotus Super Seven. Went through a couple of set. Switched back to stock & was reliable. Valve guide may be a good idea as some engineer may have spent six weeks to determine it needed it. ??

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10

Andrew,
I was just at our garage. I pulled the valve cover. There were 2 pushrod guides glistening in the LED.

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11

Thanks went to my local shop and they took one off a motor for me. they didnt stock them…