Andzey Posted October 2, 2020 Report Share Posted October 2, 2020 Recently a very reputable engine machinist published his video about all good known cylinder cracking issue https://www.youtube.com/watch?v=enNZGvjc3SU Translation in 1 sentence: MLS head gaskets have a steel ring between layers 2:53 on video, that thickens the gasket for 13/100 mm. This creates extensive stress to cast iron part of the liner and stuff happens. His advice is using the gasket that is equally thick (custom cnc made copper?) Link to comment Share on other sites More sharing options...
apeacock Posted October 15, 2020 Report Share Posted October 15, 2020 Cylinder temps! Shim those blocks and keep the fuel pump in good health. Hot for a moment = dead forever Link to comment Share on other sites More sharing options...
Vykis199009 Posted October 15, 2020 Report Share Posted October 15, 2020 shims or even better do closed deck mod. i cracked 81mm bore block, fuel was on really rich side, colder termostat, fan starting at 95c, nothing helped. I don`t understand how people run without shims on stock sleeves for few years without any problems on high power ;/ Link to comment Share on other sites More sharing options...
flyfishing3 Posted October 16, 2020 Report Share Posted October 16, 2020 The key question is what is high power. im running 1.4 bar with original block(18t), custom tune etc,etc IMO start dancing 1.8+ bar then you need block work. Link to comment Share on other sites More sharing options...
andyb5 Posted October 16, 2020 Report Share Posted October 16, 2020 19 hours ago, flyfishing3 said: The key question is what is high power. im running 1.4 bar with original block(18t), custom tune etc,etc IMO start dancing 1.8+ bar then you need block work. High power =/= stock turbo. Link to comment Share on other sites More sharing options...
Vykis199009 Posted October 17, 2020 Report Share Posted October 17, 2020 570 on the crank, 2bar boost, 4k km and sleeve cracked Link to comment Share on other sites More sharing options...
bmdubya1198 Posted October 18, 2020 Report Share Posted October 18, 2020 23 hours ago, Vykis199009 said: 570 on the crank, 2bar boost, 4k km and sleeve cracked Yeah, that adds up! I'm actually swapping an engine for a friend right now on his 2005 S60R. Still a stock K24, but the car is tuned and has a bunch of bolt-ons like an FMIC, 3" DP and full exhaust, Snabb intake, iPd OTE pipe, etc. and it's definitely cracked. Believe it or not, it was only running around 15 PSI. I'm interested to get the head off the old engine and see how bad it is. I decided he needs a 4T5 to replace that 4T4 junk. Should be dropping it in today. Link to comment Share on other sites More sharing options...
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