What is a cylinder head spacer?
03-09-2011, 05:59 PM
#1
Elite Member
Thread Starter
Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
What is a cylinder head spacer?
This one:
2000 MAZDA MIATA 1.8L 1839cc L4 FI DOHC : Engine : Cylinder Head Spacer Shim Wiki Price $10.84
VICTOR REINZ Part # 5878S
Will this work as a (misguided) means of reducing compression ratio?
(Yes I've heard about the problems with reducing squish, I'm just wondering if this is the "spacer" people talk about)
http://www.rockauto.com/catalog/rafr...arcode=1363744
2000 MAZDA MIATA 1.8L 1839cc L4 FI DOHC : Engine : Cylinder Head Spacer Shim Wiki Price $10.84
VICTOR REINZ Part # 5878S
Will this work as a (misguided) means of reducing compression ratio?
(Yes I've heard about the problems with reducing squish, I'm just wondering if this is the "spacer" people talk about)
http://www.rockauto.com/catalog/rafr...arcode=1363744
Reply
0
0
03-09-2011, 06:05 PM
#2
Senior Member
iTrader: (5)
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,260
Total Cats: 5
If I remember correctly they use these when replacing a head gasket after resurfacing the head to keep the compression ratio the same, It will lower compression, but not much its just like using a thick head gasket.
Reply
0
0
03-09-2011, 06:26 PM
#5
Yes it is to maintain CR if the head is shaved. However, they can be run without a head gasket to increase CR or run with one to decrease. I forget how much it changed the compression on my 440. (It's common practice to run a shim alone with no HG).
Do us a favor and contact the vendor about application and CR changes. I would be concerned about running more material between the head and block with high boost. Seems like it could be a weak point.
^^^^Agreed, if it is $10 it is not the shim that I am thinking about.
Mopar steel shims for 440 $160
http://www.summitracing.com/parts/DCC-5155237
Do us a favor and contact the vendor about application and CR changes. I would be concerned about running more material between the head and block with high boost. Seems like it could be a weak point.
^^^^Agreed, if it is $10 it is not the shim that I am thinking about.
Mopar steel shims for 440 $160
http://www.summitracing.com/parts/DCC-5155237
Reply
0
0
03-09-2011, 06:28 PM
#6
I'm Miserable!
Join Date: Feb 2010
Posts: 583
Total Cats: -1
Except that calling it a spacer or shim is common. It's closeout priced, like yer Mom.
https://www.miataturbo.net/attachmen...1&d=1299713317
https://www.miataturbo.net/attachmen...1&d=1299713317
Reply
0
0
03-09-2011, 08:08 PM
#8
Part Type: Cylinder Head Spacer Shim
* Manufacturer: VICTOR REINZ
* Part No: 5878S
* Notes: Requires Sealing Compound
Closeout Price: $10.84
Only 1 Remaining!
It's a Nitroseal gasket made by Clevite/Mahle I believe.
good thread: http://forum.miata.net/vb/archive/in.../t-328263.html
* Manufacturer: VICTOR REINZ
* Part No: 5878S
* Notes: Requires Sealing Compound
Closeout Price: $10.84
Only 1 Remaining!
It's a Nitroseal gasket made by Clevite/Mahle I believe.
good thread: http://forum.miata.net/vb/archive/in.../t-328263.html
Last edited by miatauser884; 03-09-2011 at 08:19 PM.
Reply
0
0
Thread
Thread Starter
Forum
Replies
Last Post
