| Author |
Message |
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
 Posted: Thu Jan 14, 2021 3:14 pm Post subject: 25hp Pistons? |
 |
|
Hello everyone. I found this NOS piston set. As you can see on the box label it has a diameter of 75mm. What is making me more confused is writing type4?!? Pistons sizes: diameter=75mm, height=80mm and the pin diam.=20mm. The brand I think is Hepolite. Does it look like pistons for 25hp split or will it be for another car? Thank you in advance for your help
|
|
| Back to top |
|
 |
sgmalt46
Samba Member
Joined: April 20, 2005
Posts: 1296
Location: south san francisco
|
| Posted: Thu Jan 14, 2021 5:16 pm Post subject: Re: 25hp Pistons? |
|
|
they do not look like any 25hp or any air cooled vw I have ever seen.
maybe diesel? rabbit/jetta? those are some fat rings ! 
_________________
55 deluxe 23 window bus
64 crew cab
55 rag top beetle
66 beetle
71 square back (sold) ! good luck with it Henry!
46 beetle 552nd royal army service corps CCG |
|
| Back to top |
|
|
Robert Chambers
Samba Member
Joined: August 11, 2005
Posts: 216
|
| Posted: Thu Jan 14, 2021 5:41 pm Post subject: Re: 25hp Pistons? |
|
|
I believe type 4 VW means they fit volkswagen. I have a couple of different sets that say the same thing. My sets are 77mm. I would measure the piston pins. Early Beetle should be 20mm.
_________________
'63 OG 117 Herbie Replica
'56 Euro Oval Deluxe
'52 Standard Zwitter
'63 OG 117 |
|
| Back to top |
|
|
mandraks
Samba Member
Joined: November 28, 2004
Posts: 7050
Location: Lawrenceville, Ga
|
| Posted: Thu Jan 14, 2021 5:52 pm Post subject: Re: 25hp Pistons? |
|
|
| Robert Chambers wrote: |
| I believe type 4 VW means they fit volkswagen. I have a couple of different sets that say the same thing. My sets are 77mm. I would measure the piston pins. Early Beetle should be 20mm. |
i think the smallest type 4 engines (1.7 Liter) had 90mm pistons.
_________________
regards
Uli
----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Fri Jan 15, 2021 12:55 am Post subject: Re: 25hp Pistons? |
|
|
| Hi. The diameter, length and pin diameter are the same of the 25hp pistons, that’s a fact. There any more other measure that I can check? |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Fri Jan 15, 2021 12:56 am Post subject: Re: 25hp Pistons? |
|
|
| Robert Chambers wrote: |
| I believe type 4 VW means they fit volkswagen. I have a couple of different sets that say the same thing. My sets are 77mm. I would measure the piston pins. Early Beetle should be 20mm. |
Do you have some Hepolite set? |
|
| Back to top |
|
|
mandraks
Samba Member
Joined: November 28, 2004
Posts: 7050
Location: Lawrenceville, Ga
|
| Posted: Fri Jan 15, 2021 6:34 pm Post subject: Re: 25hp Pistons? |
|
|
i punched the pat 616820 number into the almighty google:
https://www.google.com/search?q=pat+616820&oq=...p;ie=UTF-8
in short: these appear to be british motorcycle pistons?
_________________
regards
Uli
----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel |
|
| Back to top |
|
|
Martin Southwell
Samba Member
Joined: November 24, 2010
Posts: 986
Location: Bath, England
|
| Posted: Sat Jan 16, 2021 8:19 am Post subject: Re: 25hp Pistons? |
|
|
Are the gudgeon/piston/small end pins held in place by circlips? Are there grooves for circlips? The alternative is the pin being hold in place by a pinch bolt on the small end of the conrod.
I've adapted some Opel 75mm pistons for my 25hp engine, which didn't have circlips, but work by using teflon buttons. This sort of thing: https://www.v-dubstore.com/teflon-piston-pin-retainer-buttons-p/e4070.htm
If it says VW, and they are 75mm, then as far as I know, they will only fit Beetle 25hp or early Polo engines. Whichever the case, you should be able to use them. |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Sat Jan 16, 2021 9:30 am Post subject: Re: 25hp Pistons? |
|
|
| Martin Southwell wrote: |
Are the gudgeon/piston/small end pins held in place by circlips? Are there grooves for circlips? The alternative is the pin being hold in place by a pinch bolt on the small end of the conrod.
I've adapted some Opel 75mm pistons for my 25hp engine, which didn't have circlips, but work by using teflon buttons. This sort of thing: https://www.v-dubstore.com/teflon-piston-pin-retainer-buttons-p/e4070.htm
If it says VW, and they are 75mm, then as far as I know, they will only fit Beetle 25hp or early Polo engines. Whichever the case, you should be able to use them. |
They come with this circlips and this ring expanders.
I know the Polo pistons have also 75mm diameter but the length is shorter than 80mm.
|
|
| Back to top |
|
|
virtanen
Samba Member
Joined: January 08, 2006
Posts: 1462
Location: Finland
|
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Sun Jan 17, 2021 5:41 am Post subject: Re: 25hp Pistons? |
|
|
| virtanen wrote: |
| Upper piston rings looks like 3 mm wide? 25hp has them, later thinner. |
Yes, the 2 upper piston rings have 3mm wide, what does it mean? |
|
| Back to top |
|
|
rod_vw
Samba Member
Joined: December 20, 2006
Posts: 416
Location: Shropshire, UK
|
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Sun Jan 17, 2021 4:10 pm Post subject: Re: 25hp Pistons? |
|
|
Hi. I already sent an email to Hepolite Uk but have no answer until now. I will send also for that guy, thanks for your suggestion |
|
| Back to top |
|
|
mandraks
Samba Member
Joined: November 28, 2004
Posts: 7050
Location: Lawrenceville, Ga
|
| Posted: Sun Jan 17, 2021 8:35 pm Post subject: Re: 25hp Pistons? |
|
|
it seems to me that the pistons in the pictures are what i linked above? motorcycle pistons. They may very well have the appropriate measurements for a VW, but the pictures look identical to the ones i found online.
_________________
regards
Uli
----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Mon Jan 18, 2021 1:54 am Post subject: Re: 25hp Pistons? |
|
|
| mandraks wrote: |
| it seems to me that the pistons in the pictures are what i linked above? motorcycle pistons. They may very well have the appropriate measurements for a VW, but the pictures look identical to the ones i found online. |
They are for volkswagens as you can see on the box label, only haven’t sure about the model for now |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Mon Jan 18, 2021 2:52 am Post subject: Re: 25hp Pistons? |
|
|
Hi again,
Thanks to all... mainly to Rod VW!
John already reply... they are definitely split pistons (1947-1953):
|
|
| Back to top |
|
|
rod_vw
Samba Member
Joined: December 20, 2006
Posts: 416
Location: Shropshire, UK
|
| Posted: Mon Jan 18, 2021 3:54 am Post subject: Re: 25hp Pistons? |
|
|
John works less than half a mile (800m) from where I live, always one of the best people to ask for vintage pistons, engine bearings, and gaskets to fit any make that exists in the UK.
https://www.fwthornton.co.uk/
_________________
Rod,
Please visit http://www.historicvws.org.uk
https://www.facebook.com/historicvwclub/
1946 Beetle (Back on the road after over 50 years! Last major outing - Hessisch Oldendorf 2022)
2016 T6 Selfbuild Camper and a LWB MAN TGE in build. |
|
| Back to top |
|
|
mandraks
Samba Member
Joined: November 28, 2004
Posts: 7050
Location: Lawrenceville, Ga
|
| Posted: Mon Jan 18, 2021 5:38 pm Post subject: Re: 25hp Pistons? |
|
|
| vwssvl wrote: |
| mandraks wrote: |
| it seems to me that the pistons in the pictures are what i linked above? motorcycle pistons. They may very well have the appropriate measurements for a VW, but the pictures look identical to the ones i found online. |
They are for volkswagens as you can see on the box label, only haven’t sure about the model for now |
very cool, i guess i should have punched all the numbers into the google.
i found an ad from 2019
https://www.thesamba.com/vw/classifieds/detail.php?id=2247168
_________________
regards
Uli
----------------------------------------
'53 3-Fold Oval, L35 Metallic Blue, looking for a narrow hatch panel |
|
| Back to top |
|
|
vwssvl
Samba Member
Joined: June 13, 2017
Posts: 47
Location: Portugal
|
| Posted: Tue Jan 19, 2021 1:06 am Post subject: Re: 25hp Pistons? |
|
|
| mandraks wrote: |
| vwssvl wrote: |
| mandraks wrote: |
| it seems to me that the pistons in the pictures are what i linked above? motorcycle pistons. They may very well have the appropriate measurements for a VW, but the pictures look identical to the ones i found online. |
They are for volkswagens as you can see on the box label, only haven’t sure about the model for now |
very cool, i guess i should have punched all the numbers into the google.
i found an ad from 2019
https://www.thesamba.com/vw/classifieds/detail.php?id=2247168 |
That one aren’t for split, they have 77.5mm 😉 |
|
| Back to top |
|
|
rod_vw
Samba Member
Joined: December 20, 2006
Posts: 416
Location: Shropshire, UK
|
| Posted: Tue Jan 19, 2021 1:26 am Post subject: Re: 25hp Pistons? |
|
|
| vwssvl wrote: |
| mandraks wrote: |
| vwssvl wrote: |
| mandraks wrote: |
| it seems to me that the pistons in the pictures are what i linked above? motorcycle pistons. They may very well have the appropriate measurements for a VW, but the pictures look identical to the ones i found online. |
They are for volkswagens as you can see on the box label, only haven’t sure about the model for now |
very cool, i guess i should have punched all the numbers into the google.
i found an ad from 2019
https://www.thesamba.com/vw/classifieds/detail.php?id=2247168 |
That one aren’t for split, they have 77.5mm 😉 |
NO - a 25ps motor has 75mm pistons and all Splits should have 25ps motors.
_________________
Rod,
Please visit http://www.historicvws.org.uk
https://www.facebook.com/historicvwclub/
1946 Beetle (Back on the road after over 50 years! Last major outing - Hessisch Oldendorf 2022)
2016 T6 Selfbuild Camper and a LWB MAN TGE in build. |
|
| Back to top |
|
|
|
