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grinding barrels in CU 2.0L
Posted: 03 Jul 2010, 15:13
by dugcati
Is is possible to do away with the head-barrel sealing rings on a CU and just grind the barrel into the head as done on bugs/CT engines etc?
**E D I T***
Oh, if not where can you get them from as looked on JK and they aint there - canny look/as GSF at the mo as they are shut!
Re: grinding barrels in CU 2.0L
Posted: 03 Jul 2010, 15:47
by camper
The sealing rings come with a complete engine gasket set aprox £50.00 GSF parts.You can lap in cylinder to heads with grinding paste but some CU heads have diffrent castings that may not accept grinding so i was told.I had this problem when i did some work on a 2ltr cu t25 trying to get sealing rings.
Re: grinding barrels in CU 2.0L
Posted: 03 Jul 2010, 17:35
by bigherb
Yes you need the gaskets otherwise you will increase the compression ratio. Think VW where the only people to do the rings seperatly. Like camper said they come in the gasket sets from JK, GSF etc.
Re: grinding barrels in CU 2.0L
Posted: 03 Jul 2010, 22:11
by horizontal kipper
If your heads are aftermarket AMC heads GSF sell these, they dont use the sealing rings you have to lap the cylinders to the heads.
Try Jim at stateside tuning he used to sell just the sealing rings.
Re: grinding barrels in CU 2.0L
Posted: 04 Jul 2010, 08:48
by dugcati
Will do - the heads and barrels are all OEM so looks like the rings are needed...
Yes you need the gaskets otherwise you will increase the compression ratio. Think VW where the only people to do the rings seperatly. Like camper said they come in the gasket sets from JK, GSF etc.
Out of curiosity would you think not having them would up compression by thats much? I wouldn't have thought that a .5mm sealing ring would change compression by enough to cause issues