Tilted Forum Project Discussion Community  

Go Back   Tilted Forum Project Discussion Community > The Academy > Tilted Knowledge and How-To


 
 
LinkBack Thread Tools
Old 07-18-2003, 04:39 AM   #1 (permalink)
Upright
 
Location: denial
1984 GMC 6.2L diesel overheating. HELP!

The truck in the subject line has been having overheating problems. It seems to drink coolant. No coolant leak can be found. The thermostat checks out ok. I am changing all of the drive belts today on the off chance that one of them loose and impairing pump function. I have always had a suspicion that the coolant return system was failing. But I really don't know how to diagnose that beyond checking the tube for leaks. There is a possiblity that the EGR is screwy but I had the impression that it failing is a pretty rare thing. I don't have a code checker. Any advice about this beast would be appreciated.
zampolit is offline  
Old 07-18-2003, 06:36 PM   #2 (permalink)
**PORNHOUND**
 
Ashton's Avatar
 
Location: California
Since you can't find any leaks or signs of a leak...... your problem could be a bad spot in the head gasket between one of the cylinders and the water jacket....... the coolant would leak into the cylinder, turn into steam and flow out the exhaust.
Ashton is offline  
Old 07-20-2003, 12:53 AM   #3 (permalink)
Psycho
 
Location: norcal
with the engine running and the radiator cap off, look at the coolant and if you see a lot of bubbles, it could be exhaust leaking into the coolant=bad head gasket. You can also pressure test the cooling system as well as the radiator cap to see if either of those are leaking. Check at your local auto parts store, some will perform this kind of test for free.
__________________
so much to do, so little time.....at least i aint bored.
BigTruck1956 is offline  
Old 07-20-2003, 08:11 PM   #4 (permalink)
Buffering.........
 
merkerguitars's Avatar
 
Location: Wisconsin...
Take it into a dealer and they can run a test to see if your burning it or have any leaks....the test is fairly cheap and is pretty accurate.
__________________
Donate now! Ask me How!

Please use the search function it is your friend.

Look at my mustang please feel free to comment!

http://www.tfproject.org/tfp/showthread.php?t=26985
merkerguitars is offline  
Old 07-21-2003, 04:57 AM   #5 (permalink)
Upright
 
Location: denial
Thanks for the tips guys. I was beginning to think either head gasket or some sort of weird EGR malfunction. Nothing else seems wrong that could account for the temperature spikes I'm seeing.
__________________
Nothing is the way things are. -woo woo
zampolit is offline  
Old 07-22-2003, 03:07 PM   #6 (permalink)
Tilted
 
Probably the head gasket. I have an 82 gmc 6.2 and the older versions of that engine seem to be prone to blowing head gaskets. It happened twice on my original engine and then again on one I got fro a wrecked truck.
vinnyferrozzo is offline  
Old 07-22-2003, 10:23 PM   #7 (permalink)
Dumb all over...a little ugly on the side
 
Sion's Avatar
 
Location: In the room where the giant fire puffer works, and the torture never stops.
if the coolant is disappearing but there is not external leak, then the ONLY possibility is an internal leak. 99.9999% of the time it is a head gasket.

by the way, the EGR (exhaust gas recirculation) valve has nothing to do with engine coolant.
__________________
He's the best, of course, of all the worst.
Some wrong been done, he done it first. -fz

I jus' want ta thank you...falettinme...be mice elf...agin...
Sion is offline  
Old 07-23-2003, 12:56 PM   #8 (permalink)
Upright
 
check your oil pan to see if its got coolant mixed in.
frankyfish is offline  
Old 07-23-2003, 03:04 PM   #9 (permalink)
Psycho
 
Location: Initech, Iowa
If it's the head gasket you should see smoke coming out of the tailpipe when it starts. Not the usual black smoke but blue or white smoke.

I agree though, it's got to be either the head gasket or a cracked block.

Either way, better get a second mortgage on the house to pay for it. LOTS of money in these parts.
Dibbler is offline  
Old 07-24-2003, 09:47 PM   #10 (permalink)
Dumb all over...a little ugly on the side
 
Sion's Avatar
 
Location: In the room where the giant fire puffer works, and the torture never stops.
nah, not really that expensive. I just checked www.partsamerica.com, and they list a head gasket for that truck at about $35. now granted, prices vary from place to place (im in central Ohio) but whereever zampolit is the price shouldnt be more than $50 for a single head gasket. IF (and I should stress IF) that is all that is wrong is just one blown head gasket, then I would think you could get it replaced by a reputable mechanic for $150-$200, parts and labor.

However, you may want to consider getting both heads done, meaning removal of both heads, and a complete valve job done on them while they are off. That is, if a) the truck is still in decent enough shape to warrant putting the extra cash into and b) you plan on keeping it for a while longer (like 2+ years). Of course, this extra work will cost you quite a bit more (probably in the neighborhood of $800-$1000 for everything. but compared to buying a new truck, thats pocket change.
__________________
He's the best, of course, of all the worst.
Some wrong been done, he done it first. -fz

I jus' want ta thank you...falettinme...be mice elf...agin...
Sion is offline  
 

Tags
1984, 62l, diesel, gmc, overheating


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 08:17 AM.

Tilted Forum Project

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
© 2002-2012 Tilted Forum Project

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360