Help identifying alum pistons

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Tlitwin
Posts: 84
Joined: Fri Jan 18, 2019 3:29 pm
First Name: Tom
Last Name: Litwin
* REQUIRED* Type and Year of Model Ts owned: 1926 touring
Location: Oregon

Help identifying alum pistons

Post by Tlitwin » Tue Jan 05, 2021 12:08 pm

These pistons came out of motor that was rebuilt in the 60’s. No identifying makes other than “184” on the inside lip. Has strange relief around the wrist pins. Should I reuse them?
Tom
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Mark Gregush
Posts: 4957
Joined: Sat Jan 05, 2019 1:57 pm
First Name: Mark
Last Name: Gregush
* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1920 Dodge touring, 1948 F2 Ford flat head 6 pickup 3 speed
Location: Portland Or
MTFCA Number: 52564
Board Member Since: 1999

Re: Help identifying alum pistons

Post by Mark Gregush » Tue Jan 05, 2021 12:50 pm

How are the boars? What size are they? How did the car run before taking it down? Don't know who made them, but look to be somewhere between the cast iron and modern aluminum pistons weight wise. Cant tell from the photos, are the rings the larger 1/4" type or narrower? If narrower might want to make sure they are a size that can be found. While others will differ, if everything fits good, I would go ahead and used them. How you drive and how much you drive your car may or may not come into the picture.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup


Joe Bell
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* REQUIRED* Type and Year of Model Ts owned: 24 Fordor
Location: Tiffin Ohio
MTFCI Number: 24066

Re: Help identifying alum pistons

Post by Joe Bell » Tue Jan 05, 2021 1:59 pm

Look like Jahn's pistons


Dan McEachern
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* REQUIRED* Type and Year of Model Ts owned: too many. '14 touring, 2 depot hacks, 2 speedsters
Location: ALAMEDA,CA,USA

Re: Help identifying alum pistons

Post by Dan McEachern » Tue Jan 05, 2021 2:11 pm

Not Jahns- they never made a split skirt piston- T slot yes, split skirt-no. Those are pretty crude castings even by Jahns standards. Also the side reliefs are not typical of a Jahns. Hope that helps.


Dan Hatch
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First Name: Dan
Last Name: Hatch
Location: Alabama
MTFCA Number: 49974

Re: Help identifying alum pistons

Post by Dan Hatch » Tue Jan 05, 2021 2:44 pm

Check your piston pin clearance. Just had an engine in here with same piston, piston pin holes were worn bad. Dan

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