Hello,
After struggling with a number of gremlins on my 1HZ in a HZJ77, I've decided to get it rebuilt to 1HZ-T spec. Some of the history was documented in this thread.
1HZ fuel in oil
I've deliberated quite a bit on a 1HDT or 1HDFT swap, but the scarcity of these engines in the states, cost of import and the factor of unknowns with getting a used engine that can result in even more cost has brought me to just rebuild the one I have.
The plan is to follow what most have done in the past, upgrade internals to turbo spec and use a Gturbo.
The existing setup had a CT26 turbo installed by PO, but it was the typical scabbed together setup, with a very fuzzy history, which is another reason I want to do the rebuild and start with a fresh slate.
The tear down went fairly uneventful, I was expecting to see some obvious issues once I had everything apart, but nothing super apparent was seen, except for some buggering on top of 3 of the pistons, maybe someone can chime in on that.
I dropped of the block, crank, head and bearing cap at the local machine shop who has had experience with these in the past, thanks to Michael from Westcoast cruisers, sending many of his engines there. We'll see what they come up with once they do a thorough assessment.
My next step is to wait and see what the machine shop says, as long as they don't find any major issues like a cracked block that will force me to re-think the rebuild, I will start sourcing the parts. The plan is to do all the assembly myself, aside from the head rebuild, which the shop will do.
Couple immediate questions:
1. I've read many threads on the 1HZ-T spec and the upgraded parts to be used. Consensus is definitely new pistons and pins, but there were mixed reviews on whether its worth the extra cost of going with the 1HDT conrods versus sticking with the stock 1HZ granted they are in good condition. Appreciate some more opinions on that.
2.What are some reputable suppliers that can provide a complete rebuild kit, I know Engines australia are one, a place called noordeman has popped up when google searching 1HZ-T, any additional recommendations are appreciated.
3. I want to have as close to factory looking turbo install as possible, since the engine is out I want to tap the block for the oil feed and oil return lines. I am pretty clear on what i need to do for the feed, but haven't been able to figure out the fitting that is used for the oil return. See picture from turbo safari installation guide for reference. I have the stock 1HDT neck that come of the turbo and it appears to have a nozzle for a 7/8" hose. Can anyone help me determine what that fitting is, so i can have the machine shop tap these while they have it.
Stay tuned, more pics to come once I start getting into it.
Nick
After struggling with a number of gremlins on my 1HZ in a HZJ77, I've decided to get it rebuilt to 1HZ-T spec. Some of the history was documented in this thread.
1HZ fuel in oil
I've deliberated quite a bit on a 1HDT or 1HDFT swap, but the scarcity of these engines in the states, cost of import and the factor of unknowns with getting a used engine that can result in even more cost has brought me to just rebuild the one I have.
The plan is to follow what most have done in the past, upgrade internals to turbo spec and use a Gturbo.
The existing setup had a CT26 turbo installed by PO, but it was the typical scabbed together setup, with a very fuzzy history, which is another reason I want to do the rebuild and start with a fresh slate.
The tear down went fairly uneventful, I was expecting to see some obvious issues once I had everything apart, but nothing super apparent was seen, except for some buggering on top of 3 of the pistons, maybe someone can chime in on that.
I dropped of the block, crank, head and bearing cap at the local machine shop who has had experience with these in the past, thanks to Michael from Westcoast cruisers, sending many of his engines there. We'll see what they come up with once they do a thorough assessment.
My next step is to wait and see what the machine shop says, as long as they don't find any major issues like a cracked block that will force me to re-think the rebuild, I will start sourcing the parts. The plan is to do all the assembly myself, aside from the head rebuild, which the shop will do.
Couple immediate questions:
1. I've read many threads on the 1HZ-T spec and the upgraded parts to be used. Consensus is definitely new pistons and pins, but there were mixed reviews on whether its worth the extra cost of going with the 1HDT conrods versus sticking with the stock 1HZ granted they are in good condition. Appreciate some more opinions on that.
2.What are some reputable suppliers that can provide a complete rebuild kit, I know Engines australia are one, a place called noordeman has popped up when google searching 1HZ-T, any additional recommendations are appreciated.
3. I want to have as close to factory looking turbo install as possible, since the engine is out I want to tap the block for the oil feed and oil return lines. I am pretty clear on what i need to do for the feed, but haven't been able to figure out the fitting that is used for the oil return. See picture from turbo safari installation guide for reference. I have the stock 1HDT neck that come of the turbo and it appears to have a nozzle for a 7/8" hose. Can anyone help me determine what that fitting is, so i can have the machine shop tap these while they have it.
Stay tuned, more pics to come once I start getting into it.
Nick
