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Acquired a 2002 3UZ-FE with 58,000 miles to.replace the 1UZ-FE in my 1999 LS400.
It appears to be a plug
and-play proposition by reusing certain parts from the 1UZ-FE..
Externally 1998-2000 1UZ-FE VVTi engine blocks are identical to 3UZ-FE.
Necessary to reuse LS400 upper and lower oil pans, engine mounting brackets, engine mounts, exhaust manifolds/heat shields, throttle body, engine wiring harness, knock sensors, oil filter bracket, Spark plug coils (COP) and several minor hoses, brackets and clips...
So now have an extra like new LS430 engine wiring harness, throttle body, exhaust manifolds and set of coils...should anyone be looking.
Several.images of the upper oil pan.
The LS430 uses a center sump oil pan, while the LS400 is forward. Engine block to upper oil pan mounting hole configuration are identical.
3UZ-FE upper oil pan (top).and 1UZ-FE upper oil pan (bottom) The 3UZ-FE is configured with a center sump to clear the steering rack in the LS430. 1UZ-FE oil pick-up (LS400) shown installed (bolt on).onto 3UZ-FE block (LS430) must be used. 3UZ-FE oil pick-up.shown in hand. 3UZ-FE shown on engine stand. LS430 (3UZ-FE) exhaust manifolds shown. LS400 exhaust manifolds have yet to be transferred. LS43O exhaust manifolds are log-like. On information Toyota switched to this concept to improve cold start emissions (notice shield insert between first and second exhaust outlets)...not for optimium power production. LS400 exhaust manifolds will be used..should increase power output. LS400 upper oil pan, oil pick-up and wind age plate installed on LS430 block. The cast Aluminum upper pan stiffens the engine block. Have replaced the OEM hexhead bolts with captive flat washers with higher strength JIS washer head bolts. OEM upper oil pan to engine block setting bolt shown on right. Scrawny bolt with narrow shank..and without lock washer.. Purchased 60mm long JIS (10.9 head stamp) from McMaster-Carr. Necessary to trim.length a few mm to prevent bottoming out in blind holes of block. Better clamping.
Acquired a 2002 3UZ-FE with 58,000 miles to.replace the 1UZ-FE in my 1999 LS400.
It appears to be a plug
and-play proposition by reusing certain parts from the 1UZ-FE..
Externally 1998-2000 1UZ-FE VVTi engine blocks are identical to 3UZ-FE.
Necessary to reuse LS400 upper and lower oil pans, engine mounting brackets, engine mounts, exhaust manifolds/heat shields, throttle body, engine wiring harness, knock sensors, oil filter bracket, Spark plug coils (COP) and several minor hoses, brackets and clips...
So now have an extra like new LS430 engine wiring harness, throttle body, exhaust manifolds and set of coils...should anyone be looking.
Several.images of the upper oil pan.
The LS430 uses a center sump oil pan, while the LS400 is forward. Engine block to upper oil pan mounting hole configuration are identical.
3UZ-FE upper oil pan (top).and 1UZ-FE upper oil pan (bottom) The 3UZ-FE is configured with a center sump to clear the steering rack in the LS430. 1UZ-FE oil pick-up (LS400) shown installed (bolt on).onto 3UZ-FE block (LS430) must be used. 3UZ-FE oil pick-up.shown in hand. 3UZ-FE shown on engine stand. LS430 (3UZ-FE) exhaust manifolds shown. LS400 exhaust manifolds have yet to be transferred. LS43O exhaust manifolds are log-like. On information Toyota switched to this concept to improve cold start emissions (notice shield insert between first and second exhaust outlets)...not for optimium power production. LS400 exhaust manifolds will be used..should increase power output. LS400 upper oil pan, oil pick-up and wind age plate installed on LS430 block. The cast Aluminum upper pan stiffens the engine block. Have replaced the OEM hexhead bolts with captive flat washers with higher strength JIS washer head bolts. OEM upper oil pan to engine block setting bolt shown on right. Scrawny bolt with narrow shank..and without lock washer.. Purchased 60mm long JIS (10.9 head stamp) from McMaster-Carr. Necessary to trim.length a few mm to prevent bottoming out in blind holes of block. Better clamping.
More to come.
Im interested in the wiring harness. Is it the harness that goes to the transmission??
Did 3uzfe solve the ps pump leaking onto the alternator issue?
Starter location seems different
3UZ-FE and 1UZ-FE engine blocks are very similar.
The starter is in exact same location.
Both have same flexplate P.N.
As for P.S. LS400 and LS430 pumps, both are located above the alternator.
The LS430 employs a separate solid Aluminum mounting bracket , while the LS400 has integral mounting bracket.
The LS400 pump fits on th he LS430 block by using the two side mounting bolts and LS400 front mounting stud by installing in other front facing pretapped hole in cylinder head.
As for P.S. LS400 and LS430 pumps, both are located above the alternator.
The LS430 employs a separate solid Aluminum mounting bracket , while the LS400 has integral mounting bracket.
The LS400 pump fits on th he LS430 block by using the two side mounting bolts and LS400 front mounting stud by installing in other front facing pretapped hole in cylinder head.
Yodaone, first off this is a cool project. Koodos for taking this on.
One question is why do this? Is the cost of the 4.0 more than the 4.3? Is there limited availability of good junk yard 4.0? Is there a decent power increase going to the 4.3? From my 99 I think the HP is the same but the 4.3 gets 20 more ft-lbs of torque.
Or is is simply you just want to see if it can be done? All are great reason's, just curious to why?
Also I can't wait to see what you end up doing here!
12-26-19, 06:47 PM
Transplanting ls430 (3uz-fe) into ls400
