Clamp-on flow water jacket for 2 in tube (two halves, hose spigots) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-flow-water-jacket/  (CC BY 4.0)
Basis: Design values; M4 clearance holes ISO 273 medium
Catalog version: 2026-10-20

Sizes: see table below
- Two halves bolted round the tube with four M4 screws; each half is its own water space with two Ø8 hose spigots (in and out), so the two run in series with a short hose between them. The inner wall is pressed on the tube by the bolts.
- On the performance engines it sits over the cooler zone, 9.5 mm behind the clamp face (a 2 in clamp reaches 7.13 mm).
- Optional: without it the cold end runs hot and the power falls; a wet rag on the cold end is the minimum.

feature  value
bore  Ø50.8 × 48
water space  r 27.4–31.4
spigots  2 per half, Ø8 × 10
bolts  4 × M4

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/tri-clamp-flow-water-jacket/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-flow-water-jacket