Rebuild JX head or go up to AAZ

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dr. no
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Joined: Wed Feb 20, 2008 12:42 pm
Location: Santa Fe

Rebuild JX head or go up to AAZ

Post by dr. no »

Wow, not much traffic on this forum but worth asking...

I'm seeing a lot of oil in the intake, but no noticeable dipstick blowing, so I'm thinking the stem seals are shot, more than the rings. I need to find a new compression tester to make sure, of course.
If the bottom end is good, this should just be a valve stem seal replacment, or a head rebuild... or the chance to move up to an AAZ (please don't suggest a TDI, I'm looking for the simplest way).
Scott
http://lungehphoto.com

'83.5 Westy s/p 1.6td and 4sp transplant--wonderful!
'86 Isuzu Trooper turboDiesel
'08 RAV4 Mommymobile
'12 Suzuki SX4 Tech

PAST VWs:
'82 NA diesel Vanagon
'86 7-passenger Vanagon
'77 Bay
'71 Bay
'74 Things (2)
'69 Karmann Ghia (the only one I miss--in nice weather, anyway...)
'91 Fox
Fatmobile
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Joined: Wed Oct 30, 2002 10:28 pm
Location: north central Iowa

Re: Rebuild JX head or go up to AAZ

Post by Fatmobile »

What does it have in it now?
Are we talking 1.6?
I haven't heard of a JX head.

Compression can be determined by turning the engine over by hand.
'91 Golf gasser converted to a 12mm pump, M-TDI.
'84 1.6TD Rabbit with a VNT-15 turbo, still setup to run on vegetable oil.
'84 GTI with 1.7TD pistons and intercooled.
2003 TDI wagon
2000 TDI Jetta.
dr. no
Glow Plug
Posts: 23
Joined: Wed Feb 20, 2008 12:42 pm
Location: Santa Fe

Re: Rebuild JX head or go up to AAZ

Post by dr. no »

Thanks! JX is the 1.6 turbo that was available in Germany, with the special aneroid on the pump to fit under the deck, and solid lifters.
Scott
http://lungehphoto.com

'83.5 Westy s/p 1.6td and 4sp transplant--wonderful!
'86 Isuzu Trooper turboDiesel
'08 RAV4 Mommymobile
'12 Suzuki SX4 Tech

PAST VWs:
'82 NA diesel Vanagon
'86 7-passenger Vanagon
'77 Bay
'71 Bay
'74 Things (2)
'69 Karmann Ghia (the only one I miss--in nice weather, anyway...)
'91 Fox
Fatmobile
Global Moderator
Posts: 7564
Joined: Wed Oct 30, 2002 10:28 pm
Location: north central Iowa

Re: Rebuild JX head or go up to AAZ

Post by Fatmobile »

Turn the engine with a socket on the crank bolt.
If it wants to turn backward near the top of a stroke the compression is 375psi or better.
Turns hard but doesn't back off until 350psi.
turns pretty easy around 325.
'91 Golf gasser converted to a 12mm pump, M-TDI.
'84 1.6TD Rabbit with a VNT-15 turbo, still setup to run on vegetable oil.
'84 GTI with 1.7TD pistons and intercooled.
2003 TDI wagon
2000 TDI Jetta.
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