fill o ring grooves in block
+4
dfree383
Scott Foxwell
rmcomprandy
Kobelco
8 posters
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fill o ring grooves in block
So the cylinder O ring grooves in this block I purchased were cut oversized and over lapping. So instead of messing around with them I am going to Cometic.
Fill in grooves with? block will then be surfaced.
Fill in grooves with? block will then be surfaced.
Kobelco- Posts : 101
Join date : 2019-02-21
Re: fill o ring grooves in block
Kobelco wrote:So the cylinder O ring grooves in this block I purchased were cut oversized and over lapping. So instead of messing around with them I am going to Cometic.
Fill in grooves with? block will then be surfaced.
I have used J-B Weld epoxy, (24 hour version), for doing that because you can finish it all with just a hand body-board & sandpaper and not need to deck the block ...
Kobelco likes this post
Re: fill o ring grooves in block
It needs surfacing, so my idea is to mix JB weld (classic version of it) with real fine boring bar shavings to strengthen it. Fill grooves then surface it in Sunnen what ever the machine shop has w CBN after I file down high spots with rough cut file. Let JB weld dry for days before doing anything with it.
Kobelco- Posts : 101
Join date : 2019-02-21
Re: fill o ring grooves in block
I've run gaskets right over open o-ring grooves. Granted, they were composite...not sure how the MLS would react but guys used to do that on purpose to help "grip" the gasket. I don't see what filling the groove is going to accomplish.
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 66
Location : E Tennessee
Kobelco likes this post
Re: fill o ring grooves in block
Scott Foxwell wrote:I've run gaskets right over open o-ring grooves. Granted, they were composite...not sure how the MLS would react but guys used to do that on purpose to help "grip" the gasket. I don't see what filling the groove is going to accomplish.
As long as the fire ring has enough contact area I’d agree but not knowing the bore, groove diameter and gasket diameter I’d be cautious
dfree383- BBF CONTRIBUTOR
- Posts : 14853
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Kobelco likes this post
Re: fill o ring grooves in block
I have filled them with the copper wire then filed/sanded the copper down flat without resurfacing the block. This worked really well.
lance flake- Posts : 142
Join date : 2009-12-28
Location : union ms
Mark O'Neal, FDB and Kobelco like this post
Re: fill o ring grooves in block
dfree383 wrote:Scott Foxwell wrote:I've run gaskets right over open o-ring grooves. Granted, they were composite...not sure how the MLS would react but guys used to do that on purpose to help "grip" the gasket. I don't see what filling the groove is going to accomplish.
As long as the fire ring has enough contact area I’d agree but not knowing the bore, groove diameter and gasket diameter I’d be cautious
With BB Chev the gaskets are seldom round...had the fire ring cross right over the g roove. Never been an issue. Not sure what the concern is. If the groove was open on one end it might cause a leak but it's not. If cyl pressure gets into the groove, it really can't go anywhere.
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 66
Location : E Tennessee
Kobelco likes this post
Re: fill o ring grooves in block
Any issue with the surfacer cutting the JB weld?
Kobelco- Posts : 101
Join date : 2019-02-21
Re: fill o ring grooves in block
Scott Foxwell wrote:dfree383 wrote:Scott Foxwell wrote:I've run gaskets right over open o-ring grooves. Granted, they were composite...not sure how the MLS would react but guys used to do that on purpose to help "grip" the gasket. I don't see what filling the groove is going to accomplish.
As long as the fire ring has enough contact area I’d agree but not knowing the bore, groove diameter and gasket diameter I’d be cautious
With BB Chev the gaskets are seldom round...had the fire ring cross right over the g roove. Never been an issue. Not sure what the concern is. If the groove was open on one end it might cause a leak but it's not. If cyl pressure gets into the groove, it really can't go anywhere.
I’d be more worried about it finding a place to burn thru
dfree383- BBF CONTRIBUTOR
- Posts : 14853
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: fill o ring grooves in block
This is the most common (and most tried-and-true) method used over the decades. It is also readily reversible with the least amount of effort. And no decking necessary when the deck doesn't require it.lance flake wrote:I have filled them with the copper wire then filed/sanded the copper down flat without resurfacing the block. This worked really well.
Mark Miller likes this post
Re: fill o ring grooves in block
My block was o-ringed. The machine shop just hammered in the wires really good, and took a skim cut of the deck to clean it up. Worked out great.
BigDave65- Posts : 567
Join date : 2009-08-12
Age : 59
Location : Cliffside, NC
Re: fill o ring grooves in block
lance flake wrote:I have filled them with the copper wire then filed/sanded the copper down flat without resurfacing the block. This worked really well.
As long as the fire ring of the Cometic gasket does not cross the copper wire you will be OK without filling or sanding. The copper is soft and just flatten out.
FDB- Posts : 9
Join date : 2011-07-05
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