OakRidgeMack Posted August 10, 2008 Share Posted August 10, 2008 Is a '72 R400 suitable for a Jake Brake. What would be needed to install a Jake? Quote Link to comment https://www.bigmacktrucks.com/topic/4089-r400-jake-brake/ Share on other sites More sharing options...
fjh Posted August 10, 2008 Share Posted August 10, 2008 Is a '72 R400 suitable for a Jake Brake. What would be needed to install a Jake?What sise is the engine? 237? Quote Link to comment https://www.bigmacktrucks.com/topic/4089-r400-jake-brake/#findComment-21188 Share on other sites More sharing options...
vanscottbuilders Posted August 10, 2008 Share Posted August 10, 2008 Call Barry at Watt's Mack. If the engine is a two valve Mack diesel,they have a TEC brake for it. TEC makes a duplicate of the Jacobsengine brake for these engines. Jacobs brakes are out of production for them.If it's an R-400 with a Scania diesel, however, the TEC brake may not be the answer.Good Luck,Paul Van Scott Quote Link to comment https://www.bigmacktrucks.com/topic/4089-r400-jake-brake/#findComment-21203 Share on other sites More sharing options...
OakRidgeMack Posted August 11, 2008 Author Share Posted August 11, 2008 Yes it is a R 400 with a Scania diesel. It has the ENDT475 motor. Quote Link to comment https://www.bigmacktrucks.com/topic/4089-r400-jake-brake/#findComment-21206 Share on other sites More sharing options...
vanscottbuilders Posted August 15, 2008 Share Posted August 15, 2008 If the TEC brake won't work (call Barry),you might try a PAC exhaust brake, which couldbe very effective on this engine, and a lot simplerto install.We've had some real good discussions on this forum aboutexhaust brakes. I think the long and the short of it is thatthe valve train needs to be healthy before installing the brakeor you run the risk of piston/valve contact, which is rarely good.Paul Van Scott Quote Link to comment https://www.bigmacktrucks.com/topic/4089-r400-jake-brake/#findComment-21310 Share on other sites More sharing options...
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