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Cam journal sizes

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Old Sep 27, 2010 | 12:51 PM
  #1  
JonDSM's Avatar
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From: Victoria BC
Question Cam journal sizes

I need help identifying my cylinder head.

My origninal 4G63 head was trashed so I bought a used head in good shape from a used engine dealer that I can't get a hold of anymore. I need to find out what 4G63 this one came off of.

1980's-1999 4G63 cam journals are 25.96mm and the journals on the new G6S mystery head are 27.3mm. The head bolt holes are the same size, the oil feed is in the same place, everything on the replacement head is the same except the cam journal size.

Does anyone know if the later evos have larger cam journals? The only cam specs I can find are lift, duration and what generation they fit.
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Old Oct 24, 2010 | 07:49 AM
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From: Victoria BC
For 1990 to 1999 4G63s there is some info on the cam ID stamps posted below.

I'm looking for info on a J cam. I can't find anything on the web about cams from after 1999. Does anyone have this sort of info for the lancers?




intake: ID mark A,D: 1.3972-1.4138 < Turbo and Non Turbo Manual
intake: ID mark B,C,E,F:1.3858-1.3661 < Turbo Automatic Trans

exhaust ID mark A:1.3858-1.3661 < Turbo Automatic Trans and Non Turbo
exhaust ID mark C:1.3972-1.3776 < Turbo Manual
exhaust ID mark E,F:1.3744-1.3547 < Not Sure (90-92 all models maybe)


Intake NT opens 26 BTDC close 46 ABDC lobe height 35.493 (34.993 limit)
Intake MT opens 21 BTDC close 51 ABDC lobe height 35.493 (34.993 limit)
Intake AT opens 21 BTDC close 51 ABDC lobe height 35.200 (34.700 limit)

Exhaust NT opens 55 BBDC close ATDC 9 lobe height 35.200 (34.700 limit)
Exhaust AT opens 55 BBDC close ATDC 9 lobe height 35.200 (34.700 limit)
Exhaust MT opens 55 BBDC close ATDC 9 lobe height 35.493 (34.993 limit)
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