BogusSVO
10+ Year Contributor
- 5,891
- 318
- Jul 1, 2009
-
Pensacola,
Florida
Mitsubishi 4G63 Head Build
I am starting out with 8 heads.
5 are 1G 6 bolt and 3 are 2G 7 bolt
I think one may be a Hyundai head
Some of the heads have been through a machine shop before.
Some base information has been gathered.
The heads have been disassembled, thermal cleaned and glass beaded.
Most of the heads have the oil galley plugs removed.
All heads will be fitted with +1mm oversized valves
7 Heads will have installed BC1100 valve springs
3 Heads will use BC Ti retainers.
Some heads will receive new seats and/or new guides
All heads will receive Vition valve stem seals
Oil port mod #1 will be done
http://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html
Front view
Exhaust side
Intake side
Thermostat side
Measuring head thickness
http://www.dsmtuners.com/forums/cyl...how-measure-4g63-cylinder-head-thickness.html
New head thickness is 5.200
AREA Min thickness is 5.185
Mitsu factory allows a combined total .007 milled from head and block
Head #914 (This number was stamped by another machine shop)
1G
head markings G6/8
10mm exhaust corner studs
Oil port mod has been done
(I-F) Intake-Front 5.191 (E-F) Exhaust-Front 5.187
(I-R) Intake-Rear 5.188 (E-R)Exhaust-Rear 5.182
Head #200 (This series of heads will start with 200 and count up)
1G
Head markings 2.0/8
8mm exhaust corner studs
Oil port mod NEEDS done
I-F 5.198 E-F 5.197
I-R 5.196 E-R 5.194
Head #201
1G
Head markings G6/1
10mm exhaust corner studs
Oil port mod done
I have rebuilt this head once before
Head will receive 16 bronze guides
16 new seats
Head has been ported
I-F 5.190 E-F 5.190
I-R 5.190 E-R 5.190
Close up of guides and seats removed
lose up of guides and seats removed
http://www.dsmtuners.com/forums/newbie-forum/341218-how-change-valve-guides-4g63t-head.html
http://www.dsmtuners.com/forums/newbie-forum/341297-how-replace-seats-aluminum-head.html
Head #202
1G
Head markings G6/5
8mm corner exhaust studs
Oil port mod done
Needs 8 exhaust guides
I-F 5.167 E-F 5.166
I-R 5.166 E-R 5.165
This head is well past service limit, but can be used with a thick head gasket and adjustable cam gears, or work well on a high compression non-turbo engine.
Head #203
1G
Head markings none/smooth
(I think this is the Hyundai head)
8mm exhaust corner studs
Oil port mod done
I-F 5.188 E-F 5.194
I-R 5.188 E-R 5.194
Head #204
2G
Head markings G6S/7
Oil port Mod done
Has broken exhaust manifold stud
I-F 5.200 E-F 5.199
I-R 5.200 E-R 5.199
Head # 205
2G
Head markings G6K/3
Oil Port Mod Done
I-F 5.191 E-F 5.192
I-R 5.192 E-R 5.190
Head #206
2G
Head markings G6K/1
Oil Port Mod Done
I-F 5.195 E-F 5.195
I-R 5.196 E-R 5.193
Some of the Parts I will use
I am starting out with 8 heads.
5 are 1G 6 bolt and 3 are 2G 7 bolt
I think one may be a Hyundai head
Some of the heads have been through a machine shop before.
Some base information has been gathered.
The heads have been disassembled, thermal cleaned and glass beaded.
Most of the heads have the oil galley plugs removed.
All heads will be fitted with +1mm oversized valves
7 Heads will have installed BC1100 valve springs
3 Heads will use BC Ti retainers.
Some heads will receive new seats and/or new guides
All heads will receive Vition valve stem seals
Oil port mod #1 will be done
http://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html
Front view
Exhaust side
Intake side
Thermostat side
Measuring head thickness
http://www.dsmtuners.com/forums/cyl...how-measure-4g63-cylinder-head-thickness.html
New head thickness is 5.200
AREA Min thickness is 5.185
Mitsu factory allows a combined total .007 milled from head and block
Head #914 (This number was stamped by another machine shop)
1G
head markings G6/8
10mm exhaust corner studs
Oil port mod has been done
(I-F) Intake-Front 5.191 (E-F) Exhaust-Front 5.187
(I-R) Intake-Rear 5.188 (E-R)Exhaust-Rear 5.182
Head #200 (This series of heads will start with 200 and count up)
1G
Head markings 2.0/8
8mm exhaust corner studs
Oil port mod NEEDS done
I-F 5.198 E-F 5.197
I-R 5.196 E-R 5.194
Head #201
1G
Head markings G6/1
10mm exhaust corner studs
Oil port mod done
I have rebuilt this head once before
Head will receive 16 bronze guides
16 new seats
Head has been ported
I-F 5.190 E-F 5.190
I-R 5.190 E-R 5.190
Close up of guides and seats removed
http://www.dsmtuners.com/forums/newbie-forum/341218-how-change-valve-guides-4g63t-head.html
http://www.dsmtuners.com/forums/newbie-forum/341297-how-replace-seats-aluminum-head.html
Head #202
1G
Head markings G6/5
8mm corner exhaust studs
Oil port mod done
Needs 8 exhaust guides
I-F 5.167 E-F 5.166
I-R 5.166 E-R 5.165
This head is well past service limit, but can be used with a thick head gasket and adjustable cam gears, or work well on a high compression non-turbo engine.
Head #203
1G
Head markings none/smooth
(I think this is the Hyundai head)
8mm exhaust corner studs
Oil port mod done
I-F 5.188 E-F 5.194
I-R 5.188 E-R 5.194
Head #204
2G
Head markings G6S/7
Oil port Mod done
Has broken exhaust manifold stud
I-F 5.200 E-F 5.199
I-R 5.200 E-R 5.199
Head # 205
2G
Head markings G6K/3
Oil Port Mod Done
I-F 5.191 E-F 5.192
I-R 5.192 E-R 5.190
Head #206
2G
Head markings G6K/1
Oil Port Mod Done
I-F 5.195 E-F 5.195
I-R 5.196 E-R 5.193
Some of the Parts I will use