half circles on edge of piston.
half circles on edge of piston.
I was looking at a 440 engine on ebay. It is 499 dollars to be rebuilt. There are pictures looking down into the block at the tops of the pistons. On several you can see little half circles. It is driving me crazy as to what they are.
- dodgeboykim
- Sweptline.ORG Pioneer
- Posts: 3016
- Joined: Wed Dec 31, 1969 6:00 pm
- City: Chilliwack. B.C. Canada
- State: Foreign
- Location: chilliwack.
Re: half circles on edge of piston.
Valves kissed pistons or valve reliefs cut into piston.
My truck is younger than me.
66 W100. 70 D 500 , 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 LB Propane 360 auto 09 Yammy Rhino 700.
66 W100. 70 D 500 , 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 LB Propane 360 auto 09 Yammy Rhino 700.
- Wildergarten
- Sweptline.ORG Pioneer
- Posts: 1768
- Joined: Wed Mar 21, 2018 5:27 pm
- City: Los Gatos
- State: CA
- Contact:
Re: half circles on edge of piston.
Does it have a high lift cam in it? Sounds like somebody did that and then shaved the heads to get compression.
If that's the case, no wonder it's cheap... a short block in drag so to speak.
I'll go hide now.
'69 W200 (thumbnail)
'68 W200 (RIP)
'68 W200 383 NP435 3.53
'67 W200 383 NP435 4.10 w overload springs, Dana 60, PTO winch & flatbed dump, racks, crane, c-air (Max)
Mark Vande Pol
Wildergarten.org
'68 W200 (RIP)
'68 W200 383 NP435 3.53
'67 W200 383 NP435 4.10 w overload springs, Dana 60, PTO winch & flatbed dump, racks, crane, c-air (Max)
Mark Vande Pol
Wildergarten.org
Re: half circles on edge of piston.
Its the 1978 499$ one on ebay right now. I have no clue what I'm even looking at. Is it a weight balance thing? I don't know why I care it just is stuck in my head. Take a look at it.
Thanks!
Thanks!
-
- Sweptline.ORG Pioneer
- Posts: 7362
- Joined: Wed Dec 31, 1969 6:00 pm
- Location: Walnut Creek, CA
Re: half circles on edge of piston.
Post a link and I'll look. Not going to search ebay for it.
-
- Sweptline.ORG Member
- Posts: 215
- Joined: Tue Aug 25, 2020 7:44 pm
- City: Winter Park
- State: FL
Re: half circles on edge of piston.
Looks to me its the index mark for installing piston pointing towards front of engine.
https://www.ebay.com/itm/440-4bbl-ENGIN ... SwJF5fJCwh
https://www.ebay.com/itm/440-4bbl-ENGIN ... SwJF5fJCwh
-
- Sweptline.ORG Member
- Posts: 215
- Joined: Tue Aug 25, 2020 7:44 pm
- City: Winter Park
- State: FL
Re: half circles on edge of piston.
Pistons are usually balanced on the under side of piston.
-
- Sweptline.ORG Pioneer
- Posts: 7362
- Joined: Wed Dec 31, 1969 6:00 pm
- Location: Walnut Creek, CA
Re: half circles on edge of piston.
Yes it does - but they're the biggest, ugliest gashes Ive ever seen! And why is there 2?Volksnut wrote: ↑Fri Sep 25, 2020 6:37 pmLooks to me its the index mark for installing piston pointing towards front of engine.
https://www.ebay.com/itm/440-4bbl-ENGIN ... SwJF5fJCwh
Re: half circles on edge of piston.
Thanks guys. Now I can move on!
jim
jim