3VZ block bored to 3.4L with 5VZ heads?

thwam · 05-11-2009, 09:53 PM

I've been thinking about this for awhile now, and am curious if anyone has bored a 3VZ block to the 5VZ 93.5 mm (making it a 3.4L)? Will the 5VZ heads fit on to the 3VZ block? Is the exhaust flange the same as the 5VZ?

As you can probably tell, I'm interested in building up a 3VZ block and migrating over my 5VZ components. The main reason I would like to do this is so that I can have a reliable method to mount the AC compressor while also getting a built block out of it.

Any comments, ideas, suggestions? Thanks!

Todd

Oteck · 05-11-2009, 09:57 PM

i imagine they are totally different, the exhaust flange on the 3vz is squarish but they do share the same intake flange. your best bet is to compare HG and see if the holes lines up

thwam · 05-11-2009, 10:04 PM

I've been looking for pictures of either the short blocks or of the HG's. Can't seem to find anything helpful.

Todd

thwam · 05-11-2009, 10:07 PM

Well I used some better search terms, and found this thread http://www.mr2.com/forums/mk-2-v6/To...ads-5vzfe.html. Looks like my dreams of easy bolt on AC have disappeared lol. Back to needing a custom AC bracket. At least I can still get a built block lol.

Todd

Oteck · 05-11-2009, 11:49 PM

you can always try finding a Rav4 EV electric a/c compressor and stuff it in the frunk

thwam · 05-13-2009, 01:16 PM

Hehe, good thinking, but they don't run off 12VDC. They're 100-200 something VDC. There is a company that people who build homemade electrical cars buy from that makes a 12VDC compressor, but it pulls around 40amps, and it costs over $1K. Blehhhhh.....

Todd

Mark_Dorman · 05-13-2009, 11:39 PM

Are the cylinder walls of the 3vz thick enough to bore them over to achieve a 3.4L displacement?

thwam · 05-13-2009, 11:53 PM

I'm not sure, but the problem is that none of the oil galleys or coolant passages match up for the 5VZ heads to fit on the block.

Mark_Dorman · 05-14-2009, 12:00 AM

What's the advantage of using the 5vz heads?

thwam · 05-15-2009, 06:31 AM

Nothing. It won't work.

Oteck · 05-15-2009, 11:08 AM

theres always the 3mz route but thats too fancy for you

thwam · 05-17-2009, 02:15 AM

Not too fancy, too much of a change from my current setup. =)

05-11-2009, 09:53 PM	#1 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	3VZ block bored to 3.4L with 5VZ heads? I've been thinking about this for awhile now, and am curious if anyone has bored a 3VZ block to the 5VZ 93.5 mm (making it a 3.4L)? Will the 5VZ heads fit on to the 3VZ block? Is the exhaust flange the same as the 5VZ? As you can probably tell, I'm interested in building up a 3VZ block and migrating over my 5VZ components. The main reason I would like to do this is so that I can have a reliable method to mount the AC compressor while also getting a built block out of it. Any comments, ideas, suggestions? Thanks! Todd

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05-11-2009, 09:57 PM	#2 (permalink)
Oteck Eye'm the Str⑨ngest Join Date: Aug 2005 Location: Burnaby B.C. Posts: 4,946 Thanks: 11 Thanked 172 Times in 157 Posts Blog Entries: 3 iTrader Rating: (5/100% )	i imagine they are totally different, the exhaust flange on the 3vz is squarish but they do share the same intake flange. your best bet is to compare HG and see if the holes lines up

05-11-2009, 10:04 PM	#3 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	I've been looking for pictures of either the short blocks or of the HG's. Can't seem to find anything helpful. Todd

05-11-2009, 10:07 PM	#4 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	Well I used some better search terms, and found this thread http://www.mr2.com/forums/mk-2-v6/To...ads-5vzfe.html. Looks like my dreams of easy bolt on AC have disappeared lol. Back to needing a custom AC bracket. At least I can still get a built block lol. Todd

05-11-2009, 11:49 PM	#5 (permalink)
Oteck Eye'm the Str⑨ngest Join Date: Aug 2005 Location: Burnaby B.C. Posts: 4,946 Thanks: 11 Thanked 172 Times in 157 Posts Blog Entries: 3 iTrader Rating: (5/100% )	you can always try finding a Rav4 EV electric a/c compressor and stuff it in the frunk

05-13-2009, 01:16 PM	#6 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	Hehe, good thinking, but they don't run off 12VDC. They're 100-200 something VDC. There is a company that people who build homemade electrical cars buy from that makes a 12VDC compressor, but it pulls around 40amps, and it costs over $1K. Blehhhhh..... Todd

05-13-2009, 11:39 PM	#7 (permalink)
Mark_Dorman So long MR2's... Join Date: Apr 2008 Location: Pasadena, CA Posts: 4,666 Thanks: 97 Thanked 86 Times in 82 Posts Blog Entries: 1 iTrader Rating: (26/100% )	Are the cylinder walls of the 3vz thick enough to bore them over to achieve a 3.4L displacement?

05-13-2009, 11:53 PM	#8 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	I'm not sure, but the problem is that none of the oil galleys or coolant passages match up for the 5VZ heads to fit on the block.

05-14-2009, 12:00 AM	#9 (permalink)
Mark_Dorman So long MR2's... Join Date: Apr 2008 Location: Pasadena, CA Posts: 4,666 Thanks: 97 Thanked 86 Times in 82 Posts Blog Entries: 1 iTrader Rating: (26/100% )	What's the advantage of using the 5vz heads?

05-15-2009, 06:31 AM	#10 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	Nothing. It won't work.

05-15-2009, 11:08 AM	#11 (permalink)
Oteck Eye'm the Str⑨ngest Join Date: Aug 2005 Location: Burnaby B.C. Posts: 4,946 Thanks: 11 Thanked 172 Times in 157 Posts Blog Entries: 3 iTrader Rating: (5/100% )	theres always the 3mz route but thats too fancy for you

05-17-2009, 02:15 AM	#12 (permalink)
thwam Cage Fighter Join Date: May 2005 Posts: 298 Thanks: 0 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	Not too fancy, too much of a change from my current setup. =)