Engine - Intake Manifold Alignment Dowel Precautions
ConditionIntake Manifold, Installing Alignment Pins
24 07 02 Jan.16, 2007 2001644, supersedes Technical Bulletin Group 24 number 03-01 dated Jan. 16, 2003 due to inclusion in ElsaWeb.
Technical Background
Engine damage from intake manifold alignment pin entering engine cylinder.
The upper and lower intake manifolds and gasket are aligned using two steel dowel pins -A- in positions shown.
If care is not taken by the technician to ensure that these pins are in place when removing and installing the upper intake manifold, the alignment pin(s) may fall (unnoticed) into lower intake manifold.
If the engine is started, the pin(s) may fall into a cylinder and will then cause severe damage to the engine.
Production Solution
N/A
Service
Whenever repairs require separation of the upper intake manifold from the lower intake manifold:
- Always ensure that the alignment pins are located in the proper position.
If one or both pins are not in the proper position:
- Locate the missing pin(s) (which may have fallen into the lower intake manifold).
- Reinstall the locating pins in the proper position prior to reassembling the intake manifolds.
NOTE:
Do not reassemble the intake manifolds without locating both alignment pins into proper location.
Warranty
Information only
Required Parts and Tools
No Special Tools required
No Special Parts required