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weird problem - trans fill dipsticks won't thread in

B

bobct

Advanced Contributor
I had this problem on one side last year, where it took quite a few tries before the threads would grab and I was able to "lock" the dipstick.

I checked the level on both engines and couldn't get either one this time. Engines were hot so I left myself a note and will try again.

Is there an o-ring or something that swells up over time and doesn't allow it to fully seat? That's the only thing I can think of, the threads on the dipstick end look ok.

I assume they lock for a reason and I'm planning a long trip this weekend. The moral of the story is never check fluids before a long trip..... leave well enough alone :)


Bob

P.S. - they're BW straight drives - 10-18-004's
 
My BW dipsticks thread into a plate that sits on the bottom surface of the rubber plug. If the plug spins while you turn the handle/stick, it won't tighten. I don't really make these very tight; you know there is a nearby vent, so the case is not supposed to be airtight.
 
Dave - the base (round part) of the handle does spin, so does the handle itself. Maybe I need to try and hold the base while tightening the handle. I didn't think it was under pressure but don't want it work its way out underway.

I'll take another look, thanks.
 
Like DD said, the threaded assembly compresses (expands) the plug. You DONT want to tighten it to where the dipstick is 'locked'; you want it 'snug'. If you 'lock it down', the rubber plug's OD will increase and you won't be able to seat the dipstick...if that's the case, best to buy a new dipstick.
 
I'll betcha that's my problem. It's not threading in because it's not seating low enough for the threads to engage.

Maybe I'll order a couple of new ones now... thanks.
 
the dipsticks on my 10-18's PUSH in, the 'thread' is inside the rubber bushing at the top of the dipstick. You should be able to grasp the disk at the bottom of the rubber plug and unthread it enough to inspect the bushing. if split or distorted, replacement is in order.

you WONT be able to completely free the bushing as the business end of the dipstick is attached to the lower portion of the threaded shaft. if you want to remove it, get it welded. (measure first, to get the "full" mark in the correct position.
 
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