1989 to 1994 3VZE differences? Timing? Mounts?
02-14-2013, 04:48 AM
#1
Registered User
Thread Starter
1989 to 1994 3VZE differences? Timing? Mounts?
I have been doing alot of trolling and reseaching all over the web and here on Yotatech and still cant find answers to what I am trying to figure out as almost any useful thread comes to a dead halt or never proven one way or another.
I have a 1994 Toyota 4Runner 3VZE powered truck. After 260xxx hard miles she is tired and lost compression in 1 cylinder. I did however find a remanufactored motor locally with 20xxx on it out of a 1989 Pick Up. Now I know right off the bat I have to use my electronics and accessories as the connectors are all different 92.5 and up oppsed to the early 1988-1992 components.
My first question once and for all is, is it infact possible to ditch the mechanical timing belt tensioner set up from the 1989 block and heads and run all the components from my 1994 hydrolic tensioner. I have read no because there is no hole in the head for it, I have read yes you can but no proof and I have seen threads of people going opposite and converting hydrolic for mechanical but with no proven pictures or facts.
My next question is what exactly is the difference from the early blocks to the later, I stumbled upon a post last night by accident about the 3V motor mount brackets being different between the years, but yet hear again, most threads lead to dead ends. Luckily I have the 1989 brackets for my 1994 but will I have any mounting issues, clearence issues, height issues or anything else.
Last question, as far as I know the intake manifolds are interchangable, upper and lower. Am I correct on this
Thanks in advance
-Dave
I have a 1994 Toyota 4Runner 3VZE powered truck. After 260xxx hard miles she is tired and lost compression in 1 cylinder. I did however find a remanufactored motor locally with 20xxx on it out of a 1989 Pick Up. Now I know right off the bat I have to use my electronics and accessories as the connectors are all different 92.5 and up oppsed to the early 1988-1992 components.
My first question once and for all is, is it infact possible to ditch the mechanical timing belt tensioner set up from the 1989 block and heads and run all the components from my 1994 hydrolic tensioner. I have read no because there is no hole in the head for it, I have read yes you can but no proof and I have seen threads of people going opposite and converting hydrolic for mechanical but with no proven pictures or facts.
My next question is what exactly is the difference from the early blocks to the later, I stumbled upon a post last night by accident about the 3V motor mount brackets being different between the years, but yet hear again, most threads lead to dead ends. Luckily I have the 1989 brackets for my 1994 but will I have any mounting issues, clearence issues, height issues or anything else.
Last question, as far as I know the intake manifolds are interchangable, upper and lower. Am I correct on this
Thanks in advance
-Dave
02-14-2013, 06:37 AM
#2
1. Yes. But there's machining involved if you'll be using the earlier heads. And possibly minor water pump modification(or swapping). See quote below:
http://www.enginebuildermag.com/Arti...ta_30l_v6.aspx
2. No.
3. Yes, AFAIK.
Cylinder heads
The cylinder heads are unique from left to right due to a spot for the distributor, although you can convert the heads by changing the caps and line boring the cylinder head. The early cylinder heads (’88 through ’90) had a smaller pilot hole for the distributor than the later ones which were 10mm.
To make a universal application, some shops have successfully machined the pilot holes to 10mm to fit later applications. This can be done without any problems if used on an earlier application with the smaller piloted distributor. The left and right camshafts did not change throughout the life span of the motor.
Timing components
The belt tensioner used from ’88-’92 was a spring loaded tensioner (Toyota p/n 13505-65020). In 1993 the tensioner went to a hydraulic style (Toyota p/n 13505-65040) (see photo on page 38). To accommodate this change, the front of the right-hand cylinder head has a machined recess and a drilled and tapped hole. Earlier heads may be machined to be adapted if necessary.
The timing belt was also changed to accommodate the difference in the tensioner at the same time. If you are supplying water pumps, be aware of a couple of things to watch out for (see photo on page 39). Different applications had a bypass nipple while some did not.
The best bet is to have the customer identify which pump they have. From ’88-’92 the water pump must have a locator pin at one end for the spring on the timing tensioner. The 1993 and later water pumps did not have the pin. The pin can be knocked out on new and remanufactured water pumps that have the pin if it is not needed for the later applications
The cylinder heads are unique from left to right due to a spot for the distributor, although you can convert the heads by changing the caps and line boring the cylinder head. The early cylinder heads (’88 through ’90) had a smaller pilot hole for the distributor than the later ones which were 10mm.
To make a universal application, some shops have successfully machined the pilot holes to 10mm to fit later applications. This can be done without any problems if used on an earlier application with the smaller piloted distributor. The left and right camshafts did not change throughout the life span of the motor.
Timing components
The belt tensioner used from ’88-’92 was a spring loaded tensioner (Toyota p/n 13505-65020). In 1993 the tensioner went to a hydraulic style (Toyota p/n 13505-65040) (see photo on page 38). To accommodate this change, the front of the right-hand cylinder head has a machined recess and a drilled and tapped hole. Earlier heads may be machined to be adapted if necessary.
The timing belt was also changed to accommodate the difference in the tensioner at the same time. If you are supplying water pumps, be aware of a couple of things to watch out for (see photo on page 39). Different applications had a bypass nipple while some did not.
The best bet is to have the customer identify which pump they have. From ’88-’92 the water pump must have a locator pin at one end for the spring on the timing tensioner. The 1993 and later water pumps did not have the pin. The pin can be knocked out on new and remanufactured water pumps that have the pin if it is not needed for the later applications
2. No.
3. Yes, AFAIK.
02-14-2013, 11:23 AM
#3
Registered User
Thread Starter
That is alot of good info thank you, I am going to have to check the pilot hole on the head to see if it is 10MM, I didn't realize there was a difference in pilot holes from the switch over. I got them cleaning in a tank right now so i'll check it with a 10MM drill bit
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