Diesel Bombers SIGN UP NOW

National Association of Diesel Motorsports
Go Back   Diesel Bombers > Dodge Cummins > 1st Generation Dodge Cummins 89-93
Sign in using an external account
Register Forgot Password?
Search
Welcome to Diesel Bombers


Registered Members don't see these ads. Register now it's free!

1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-28-2012, 06:01 PM
MudDrivermike's Avatar
Diesel Fan
Status: I am SICK of this cold weather!!!!

   
View Member's Albums

Default 1989 6bt piston ring gap???

Could some one tell me what the stock piston ring gap is supposed on my 89 6bt? Im putting this engine back together and the only book I got from work is for the 6bt cummins engines i work on in our heavy equipment. If I go by their ring gap spec ,,Im out..And looking online I saw somewhere that its supposed to be 0.26mm-0.36mm, Not what this book says.. Im getting mixed info where I look..Any help on this? Thanks Mike

MudDrivermike's Sig:1978 bronco, 89 6BT Cummins,91 head, Dana 60s front and rear, 4.56s, 9 in suspension lift, 3 in body, 40 inch ground hawgs,727 Trans,advance adapters T case adapter,Completely rebuilt by Myself,M&H M3 fuel pin,4000 rpm spring,dynamic timing kit
Reply With Quote
  #2  
Old 01-28-2012, 06:41 PM
Diesel Enthusiast

   
View Member's Albums View Member's FaceBook Profile

Default

#1 .0160-.0275 / no side clearance available
#2 .0100-.0215 / .006 side clearance
Oil Ring .0100-.0215 / .005 side clearance

kieron_kohlmann's Sig:92' W250, P-Pump swap, #4 plate, 4K spring gov/valve springs, mack rack plug, hx35/40, SDX 5x14, airdog pump, pro-torque converter, red eagle clutches, billet input shaft, shift kit, billet flex plate, Snow Performance Stage 3 Water/Meth.
Reply With Quote
  #3  
Old 01-28-2012, 07:25 PM
MudDrivermike's Avatar
Diesel Fan
Status: I am SICK of this cold weather!!!!

   
View Member's Albums

Default

Well going by that, then im out of spec. This engine you could eat off of and was supposed to be a good running engine. Im measuring the top ring @3.5 inches from top of cylinder at 0.028 or so. Now I dont have the tool to measure cylinder bore. The piston doesnt seem to have any kind of excessive play in the cylinder and it had a perfect looking crosshatch pattern in the cylinder..So could it just be it needs rings? I dont mind replacing them if so. I want to put this engine together ONCE!
Reply With Quote
  #4  
Old 01-29-2012, 08:50 PM
Diesel Enthusiast

   
View Member's Albums View Member's FaceBook Profile

Default

Depends on piston to cylinder clearance. Take it to a machinist to be measured if you don't have the tools. Easier to do it once.
Reply With Quote
  #5  
Old 01-29-2012, 09:42 PM
MudDrivermike's Avatar
Diesel Fan
Status: I am SICK of this cold weather!!!!

   
View Member's Albums

Default

Im going to see how much the tool cost. That way at least ill know if its the cylinders or just the rings. That and ill call Cummins and see how much rings,mains,and rod bearings cost.I priced out those parts from autozone,But after looking around on here,Just about everyone seems to say go with the cummins parts. Sounds good to me. You just never know with these aftermarket parts. Ill keep posting on the outcome of this issue.
Reply With Quote
  #6  
Old 02-02-2012, 05:33 PM
MudDrivermike's Avatar
Diesel Fan
Status: I am SICK of this cold weather!!!!

   
View Member's Albums

Default

OK Just an update..I have the cylinder bore measuring tool coming that attaches to my dial indicator..Once I measure the bore Ill know where I stand.
Reply With Quote
  #7  
Old 03-04-2012, 10:42 AM
MudDrivermike's Avatar
Diesel Fan
Status: I am SICK of this cold weather!!!!

   
View Member's Albums

Default

Ok I have reinstalled the pistons. I bought rings from cummins. Its amazing how much an almost unnoticable thickness between the old rings and new rings drastically decreased the gap. Looking at them on top of each other I had doubts until I checked the new ring gap. All the bearings in the engine are also from Cummins. I just didnt feel comfortable using aftermarket parts for the internals of the engine. SO now Im working on the head,and should have that installed sometime this week. Thanks for the info..Mike
Reply With Quote
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


 
All times are GMT -5. The time now is 04:01 PM.

Copyright And Legal Notice Links Of Interest

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.5.2
Diesel Bombers ® - All Content Protected Under Intellectual Property Rights Law of Registered Trademarks
Reg. No. 3,494,401 Cls. 100, 101 & 104 Under Int. Cl. 38
USE AT YOUR OWN RISK WE HOLD NO LIABILITY FOR ANY CONTENT RIGHT, WRONG OR INDIFFERENT

Protected by Copyscape Duplicate Content Check


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233