ninedee_golf_tdi
Vendor
Humor me and keep the idiotic comments to yourself please. Just wondering if anyone has adapted an alh head to fit onto a 1z block. Thanks.
alh head on a 1z block
- Thread starter ninedee_golf_tdi
- Start date
ketchupshirt88
Veteran Member
- Joined
- Oct 31, 2012
- Location
- waupaca, WI
- TDI
- 2005 Passat daily, a bunch of others in the graveyard out back...
nope, completely different block designs. heads are not interchangeable in any way.
Lug_Nut
TDIClub Enthusiast, Pre-Forum Veteran Member
- Joined
- Jun 20, 1998
- Location
- Sterling, Massachusetts. USA
- TDI
- idi: 1988 Bolens DGT1700H, the other oil burner: 1967 Saab Sonett II two stroke
1Z (AHU) has a crank breather plastic tube bolted on the 'front' of the engine that leads to the puck on top of the valve cover.
ALH has an integral, cast in, passage for the crank gasses, a port through the head gasket, and a port in the head into the valve galley.
ALH has an integral, cast in, passage for the crank gasses, a port through the head gasket, and a port in the head into the valve galley.
turbocharged798
Veteran Member
This. Absolutely will not work.
ninedee_golf_tdi
Vendor
Let's just say that a real smart fella gave me the idea that it might work. So after thinking about it and realizing that folks have made 5 speed trannys turn into 6 speed, single turbo turns into compound, 90hp turns into 150.... almost anything is possible, just maybe not putting an alh head on a 1z block. Case closed.
Pretty sure it bolts up and all, same as running an ALH crank/block for a stroker 1.8T
There's just the issue of the larger rectangular oil drain on the ALH head, but you can easily enough TIG up the passage to the same size as the one on the 1Z block. Supposedly the gasoline guys run a special head gasket, or weld up the head to cover the rest of the hole. Never really looked into that side of things.
If you do run into drainback issues (farting oil out the breather) it's easy enough to add another breather in the side of the block, drill, NPT tap, bingo bango done.
Got an AHU/1Z head and an ALH head at the shop, both are kinda junk. Was toying with the 1Z head onto a 1.6D, but the 1.6 is still running so I don't really want to screw with it too much.
There's just the issue of the larger rectangular oil drain on the ALH head, but you can easily enough TIG up the passage to the same size as the one on the 1Z block. Supposedly the gasoline guys run a special head gasket, or weld up the head to cover the rest of the hole. Never really looked into that side of things.
If you do run into drainback issues (farting oil out the breather) it's easy enough to add another breather in the side of the block, drill, NPT tap, bingo bango done.
Got an AHU/1Z head and an ALH head at the shop, both are kinda junk. Was toying with the 1Z head onto a 1.6D, but the 1.6 is still running so I don't really want to screw with it too much.