880joe Posted February 28, 2022 Share Posted February 28, 2022 What's the max amount that you can shim the liners to get the proper liner height? I have a block that needs shimmed 160 thousand on 2 liners Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/ Share on other sites More sharing options...
Joey Mack Posted February 28, 2022 Share Posted February 28, 2022 (edited) you are over joe...if the measure is correct.... I would like to hear from MackPro on this as well. I learned .1000 is the max.. however... i have never pushed that issue... the most i have ever shimmed was .012".. the shelf is 4.010" ish - 4.030" ... stock....liner protrusion allowance is .023" - .029" with .002" variance on the front 3 holes and the rear 3 holes... however, I always want to learn from others on this.. . jojo Edited February 28, 2022 by Joey Mack Poor spelling Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490544 Share on other sites More sharing options...
Mackpro Posted February 28, 2022 Share Posted February 28, 2022 I was think the book says no more than .030” in shims but I remember cutting the counterbore way more. I wish Mack or aftermarket would make some thicker shims than .010” or at least that was the thickest we ever got to use back then. I know the Reman center cuts the counterbore 3/4” and drives a stainless ring into the block to get the counterbore to the 4.00” to top of block measurement. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490562 Share on other sites More sharing options...
880joe Posted February 28, 2022 Author Share Posted February 28, 2022 Would it cause problems to just mill .150 off the block or would that effect being able to adjust the valve train Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490567 Share on other sites More sharing options...
fjh Posted March 1, 2022 Share Posted March 1, 2022 11 hours ago, Mackpro said: I was think the book says no more than .030” in shims but I remember cutting the counterbore way more. I wish Mack or aftermarket would make some thicker shims than .010” or at least that was the thickest we ever got to use back then. I know the Reman center cuts the counterbore 3/4” and drives a stainless ring into the block to get the counterbore to the 4.00” to top of block measurement. What was old is new again! This was done back in the day of the V8 and N14 I had no idea they did this with the E7 Thanx for posting that pro! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490636 Share on other sites More sharing options...
fjh Posted March 1, 2022 Share Posted March 1, 2022 9 hours ago, 880joe said: Would it cause problems to just mill .150 off the block or would that effect being able to adjust the valve train Piston protrusion would be effected! Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490637 Share on other sites More sharing options...
theakerstwo Posted March 1, 2022 Share Posted March 1, 2022 One of my engines was getting coolant in the oil so i found it was passing by #2 liner to block stop and i pull it to find its crack some.Mack sent a hand out to cut it and he had to go to .060 deep to clean it up.He told me i needed a block but he had done this before and no problem.I shimed it and i think i have about 150000 miles on it and it has not dropped as for as i know.Yes my manual say .030 max also but i said me running it i will know if it starts to leak compression so i will take a chance. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490640 Share on other sites More sharing options...
Mackpro Posted March 1, 2022 Share Posted March 1, 2022 We rarely ever cut counterbore on the E-7 or the ETECHs till after they made the coolant filter/conditioner optional in around 2002. Of course fleets and cheapskates ordered trucks without the coolant filter stand to save $50-$75 per truck . 8 to 10 years later coolant in the oil and damaged engine blocks with pitted counterbore ledges everywhere. 2002 was also the year we started seeing the casting core sand not flushed out of the engine blocks during assembly. This clogged the air compressor coolant line causing the air compressor to overheat , blow the air compressor head gasket and pump/force coolant up the air intake pipe and dump coolant into the back of the intake manifold where #6 piston then sucked in the coolant and hydro locking the engine, bending #6 connecting rod. Sometimes so bad we had to cut the rod with a torch to get it out . And this wasn’t rare , one time we had 2 trucks do it on the same day . However, 2002 was my favorite year , a axle forward CH with a CCRS 427 and a Fuller Super 10 trans was my dream truck and still is. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490643 Share on other sites More sharing options...
Joey Mack Posted March 1, 2022 Share Posted March 1, 2022 I remember those days in early 2000.. I did quite a few core sand repairs and stand pipe updates.. as far as cutting counter bores, I remember measuring the shelf in 3-4 spots, and looking for cavitation that went from the bore wall out to the edge of the shelf.. thats when we cut 'em... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490649 Share on other sites More sharing options...
Onyx610 Posted March 1, 2022 Share Posted March 1, 2022 Does that core sand happen to be like very fine and black/dark grey? Had some coolant drained out in a 5 gallon bucket on one of these and saw a lot of that. I figured it was casting sand. Never knew that was a legit issue with them. Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490652 Share on other sites More sharing options...
Mackpro Posted March 1, 2022 Share Posted March 1, 2022 They had a service bulletin on it . SB 261-008. https://www.yumpu.com/en/document/view/31273801/service-bulletin 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490662 Share on other sites More sharing options...
Joey Mack Posted March 1, 2022 Share Posted March 1, 2022 Onyx.... yes..... jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69299-etech-liner-shims/#findComment-490687 Share on other sites More sharing options...
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