Hey.

I am currently building a LS6 346 with AFR 210 V2.
Some of the build spec was given by Mamo himself, and he told me to go with 4.160 head gaskets to fit the heads.
The gaskets fit the heads great, but it might seems like their to big for the block?
it looks like they are not seeling over the steel sleeves in the block.

Is this okey, or do i have to get new smaller gaskets?

Best regards Tommy

 

those will work fine....im running LS9 MLS head gaskets on my turbo 4.8 like was recommended even though the bore is different

 

Your good...you want the gasket bigger than the largest opening whether it head chamber or bore so no part of the gasket is exposed

 

But wont it be a problem to get good clamping load from the head to the liners/sleeves when the head gasket is not touching the liners/sleeves at all? Or does that not mather at all?

I can see there is no problem on a steel block but with an alu block w liners/sleeves might it be a problem?

Tommy

 

whenever you use heads that have a larger bore than your cylinders you have to get a gasket to match them..

For instance if you put 317 truck heads onto a ls1 engine you have to run ls2 head gaskets to match the heads. If you ran a gasket to match your block and ran a bigger set of heads then you would be blocking part of the combustion chamber in the heads..

 

There won't be a problem with the gaskets sealing against the aluminum. Use the ones you have.

 

May be a stupid question, but if I'm changing heads on my l s1 to a set of 243s, do I need to run 6.0 gaskets?

 

Nope.

 

243's will fit perfect with stock GM ls1 mls gaskets

 

I just went through the same thing with the 210 v2 heads. Their website says to use a 4.135" bore gasket, which seems big considering how it fits (see below). It probably doesn't matter, so I just bought the gaskets anyway.

head bore: 3.96x"
block bore: 3.905"

 

Those gaskets are clearly too large for your heads/bore size. Why would anyone recommend that size?
Plus your lowering the CR.

I would use the LS1/LS6 bore gaskets.

Russ Kemp

 

I tend to agree however, Josh at afr, Tony at afr, and afr's website all said to use the 4.135" bore head gasket for the 210 heads.

Also, my scr calculation accounted for the gasket bore and thickness.

 

I don't see where on website it shows to use 4.135 on the 210's only for the 215's it says to use the 4.135.

 

http://www.airflowresearch.com/index.php?cPath=76_77

felpro 1041 is a 4.135" bore gasket

http://www.summitracing.com/parts/FEL-1041/

 

Ok, but if you click on the cometic head gasket right below the felpro it has a bore of 3.930

 

the plot thickens! I think 3.93" would be too small, I measured the CC width as about 3.96".

I asked Josh and Tony and they both said to use the 4.135" gasket. Hopefully they will chime in.

 

Go with what Tony Mamo recommends. If head bore is 3.96 so 4.135 is the way to go. You always accommodate the larger bore whether on head or block.

 

I'm using a 4.060 bore head gasket on my LQ4 with AFR210 with no problems. The H.G. bore was bigger than chamber on head and cylinder.

 

That would be a good choice as well. Any bore bigger than 3.96 by .030 would be fine

 

I apologize for being late to respond....Ive been buried at AFR and sometimes its just impossible to get caught up on emails/PM's etc.

Bottom line is the 205 and the new 210 head can be run with a smaller bore gasket on a small bore engine of course (3.930 - 3.940 OD gasket is ideal IMO) but the reality is you can run a larger gasket.....its not really an issue besides the fact it will slightly, and I mean slightly lower the CR unless its accounted for in the static CR calculations.

The 215's and ALL the larger AFR Gen III heads we produce require the larger 4.135 bore gaskets to clear the chamber shape of our heads which are typically unshrouded on the larger heads to make room for the larger valves etc. In fact the AFR 245's require a 4.200 bore gasket to clear the chamber and large 2.165 intake valves.

If I told anyone differently I apologize.....I might have been thinking it was a 215 head we were discussing. I will get with Josh in the AM to make sure he is clear on this as well.

Thanks,
Tony