3.4 5VZFE Block w/3.0 3VZE Heads Possible?
#1
Registered User
Thread Starter
3.4 5VZFE Block w/3.0 3VZE Heads Possible?
I was wondering if a 5VZFE short block can work with 3VZE heads to make a hybrid 3.4 SOHC engine? The 3.0 heads are a real bottleneck, so it isn't the best idea, but I'm just wondering. -- Matt
#3
Registered User
Thread Starter
#4
Registered User
actually the heads should bolt on as the block configuration is pretty much identical to the 3.0 3vze. but u would have a problem with the fact that the domes in the head are to small and a few other issues with the heads actually sealing down properly. mostly likely if u actually made it you would have headgaskets blowing left and right.
#6
Registered User
Thread Starter
The combustion chambers in the heads would certainly be a few millimeters smaller in relation to the piston diameter. I wonder if the domes on the pistons are so different that there would be an issue? Probably totally different, four valves versus two.
I'm in for a 5VZFE swap or two as soon as I can afford it. -- Matt
I'm in for a 5VZFE swap or two as soon as I can afford it. -- Matt
Trending Topics
#8
Registered User
what??? thats like saying let put 1914 model A heads on a hand built Ferrari engine?? lmao but seriously the 3.0L or 3vze heads are the worst part of a 3vze, thats why they made the dual overhead cam heads and kept the 3vze block. so yes i think it is possible but a very bad idea lol. now what you should try and do is put 3.4 heads on a 3.0L haha
#11
Registered User
Join Date: Feb 2008
Location: hendersonville, TN.
Posts: 1,417
Likes: 0
Received 0 Likes
on
0 Posts
#12
Registered User
problem with putting 5vz heads on 3vz block would again be dishes in the heads but the reverse problem this time as the dishes in the 5vz heads would be to big and would line up with the sealing metal rings on the head gaskets.
#13
Registered User
Join Date: Feb 2008
Location: hendersonville, TN.
Posts: 1,417
Likes: 0
Received 0 Likes
on
0 Posts
#15
Registered User
so what about the fact that ur going to have compression on the sides of the piston and heat because fuel and air are going to be in that open space around the top of the piston
#16
Registered User
Join Date: Feb 2008
Location: hendersonville, TN.
Posts: 1,417
Likes: 0
Received 0 Likes
on
0 Posts
??.. do you mean the head gasket from the 3.4 will still be bigger then the 3.0 after the bore?
#18
Registered User
yes 0.20 not 0.020 first is 20 hundreths second is 20 thousandths. 5vz bore is 94mm while the 3vz bore is 90mm. you cannot bore a 3vz to 94mm with out the cylinder walls becoming to thin and having lots and lots and lots of issues. 4 millimeters = 0.157480315 inches. so actually its only 0.16bigger but thats enough that you couldnt bore it the biggest bore job your going to do on a 5vz is 0.040 over. even on the old iron big blocks the most they went was 0.080 over which is still half of what you would need to make a 3vz 3.0 into a 3.4 3vz
Thread
Thread Starter
Forum
Replies
Last Post
jon.r
General Vehicle Related Topics (Non Year Related)
8
07-11-2015 03:34 PM