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cylinder head

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001200
EISBN: 978-1-62708-221-1
... was promoted by the formation of undercooled microstructure of low strength in the thin-walled part. Similar damage appeared in a cylinder head, in which case, the cracks were promoted by a supercooled structure. Castings Cylinder heads Engine blocks Shrinkage Stresses Gray iron Casting-related...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047263
EISBN: 978-1-62708-218-1
... Abstract An engine cylinder head failed after operating just 3.2 km (2 mi) because of coolant leakage through the exhaust port. Visual examination of the exhaust ports revealed a casting defect on the No. 7 exhaust-port wall. A 0.9x examination of an unpolished, unetched longitudinal section...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089526
EISBN: 978-1-62708-218-1
... Abstract A gray iron cylinder head cracked after approximately 16,000 km of service. The head was cracked on the rocker arm pan rail next to the No. 3 intake port and extended into the water jacket on the rocker-arm side of the head. Microporosity was revealed in the crack in the sections taken...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
...Stress relaxation in cylinder head bolts during the endurance test Table 1 Stress relaxation in cylinder head bolts during the endurance test No. Bolt length, mm Stress relaxation, MPa Initial Before running-in After running-in After test Before and after running-in Before...
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Published: 01 June 2019
Fig. 1 Crack in a gray-iron cylinder head. (a) Crack on side of head next to manifold No. 3. (b) Another view of the same crack, which ends at the water jacket vent plug. Both 0.5× More
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Published: 01 January 2002
Fig. 1 Crack in a gray-iron cylinder head. (a) Crack on side of head next to manifold No. 3. (b) Another view of the same crack, which ends at the water jacket vent plug. Both 0.5× More
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Published: 30 August 2021
Fig. 2 Crack in a gray iron cylinder head. (a) Crack on side of head next to manifold No. 3. (b) Another view of the same crack, which ends at the water jacket vent plug. Original magnification of both: 0.5× More
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Published: 01 June 2019
Fig. 1 Section from a failed cylinder-head exhaust port. The shrinkage porosity allowed engine coolant to leak into the exhaust port. Not polished, not etched. 0.9× More
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Published: 01 June 2019
Fig. 2 Additional views of the failed cylinder head shown in Fig. 1. (a) Fracture surface observed when the crack shown in Fig. 1 was opened. 0.5×. (b) Specimen taken from area adjacent to the vent plug showing microporosity. Etched with 2% nital. 100×. (c) Same as (b), but at a higher More
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Published: 01 June 2019
Fig. 8 Sections through water chamber of cylinder head. 1 × More
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Published: 01 June 2019
Fig. 9 Section of corner of cylinder head (lower right in Fig. 8 ). Etch: Picral. 3 × More
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Published: 01 December 2019
Fig. 1 Cracked zone on the cylinder head More
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Published: 01 December 2019
Fig. 4 Removal torque (Nm) of the cylinder head bolts during the engine disassembly More
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Published: 01 December 2019
Fig. 5 The flatness of the cylinder head surface (where connected to engine block) More
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Published: 01 December 2019
Fig. 9 The locations of hardness measurements on the cylinder head More
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Published: 01 January 2002
Fig. 2 Additional views of the failed cylinder head shown in Fig. 1 . (a) Fracture surface observed when the crack shown in Fig. 1 was opened. 0.5×. (b) Specimen taken from area adjacent to the vent plug showing microporosity. Etched with 2% nital. 100×. (c) Same as (b), but at a higher More
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Published: 01 January 2002
Fig. 3 Shrinkage porosity at bolt-hole bosses in a ductile-iron cylinder head More
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Published: 30 August 2021
Fig. 3 Additional views of the failed cylinder head shown in Fig. 2 . (a) Fracture surface observed when the crack shown in Fig. 2 was opened. Original magnification: 0.5×. (b) Specimen taken from area adjacent to the vent plug showing microporosity. Etched with 2% nital. Original More
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Published: 30 August 2021
Fig. 86 (a) Cylinder longitudinal and circumferential welds. (b) Bottom head welds (dimensions given in inches). Location of crack indications shown in red More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001743
EISBN: 978-1-62708-217-4
... Abstract Cylinder fatigue can result from abnormal heating in service. Fatigue can be experienced also by piston heads, exhaust valves, and turbosupercharger housings (castings). Pistons from different engines series can sometimes fit, but because of slight design modifications, they may...