streamer Posted August 21, 2008 Report Share Posted August 21, 2008 I got her started and she runs like a Swiss watch. Oil pressure steady at 40 lbs at idle. That seems high so I will check the plunger on the relief vale to make sure it is not stuck. Only one thing to fix -- the two exhaust manifold bolts the are hidden under the intake, have drips of water coming out around the bolt heads. I assume they must thread into the water jacket. I now remember reading on here something about thread sealer for those two bolts. Could someone please tell me what type of sealer I need to use. Thanks Quote Link to comment Share on other sites More sharing options...
Norm's Coupe Posted August 22, 2008 Report Share Posted August 22, 2008 I used white teflon brush grade sealer on mine. Others have used teflon tape. So, take your pick. Quote Link to comment Share on other sites More sharing options...
streamer Posted August 22, 2008 Author Report Share Posted August 22, 2008 Thanks, teflon tape it is. Quote Link to comment Share on other sites More sharing options...
chucky07 Posted August 22, 2008 Report Share Posted August 22, 2008 i'm hopefully going to start my freshly rebuilt engine this weekend and now I'm worried about my ex. manifold bolts leaking..can somone tell me which ones I needed to seal? I sealed none of them..just cleaned then and installed them.... Guess I'll hold off on starting it up till I put sealer on the appropriate bolts. thx in adv. Quote Link to comment Share on other sites More sharing options...
Merle Coggins Posted August 22, 2008 Report Share Posted August 22, 2008 I used pipe dope on all of my head bolts and manifold bolts. Most of them go into the water jacket, so just to cover my @$$ I sealed them all. Merle Quote Link to comment Share on other sites More sharing options...
Young Ed Posted August 23, 2008 Report Share Posted August 23, 2008 BTW 40-45 is perfect for a fresh rebuild. Mine relieve at 45. Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted August 23, 2008 Report Share Posted August 23, 2008 I used pipe dope on all of my head bolts and manifold bolts. Most of them go into the water jacket, so just to cover my @$$ I sealed them all.Merle I did the same dope trick as Merle. My only leak at startup was a water pump bolt dripping on the front motor mount bolt. Easy fix for me as I ran my engine on a test stand prior to installing it in the car. But it would be wise to also dope the water pump mounting bolts as they also penetrate the water jacket. Quote Link to comment Share on other sites More sharing options...
streamer Posted August 27, 2008 Author Report Share Posted August 27, 2008 I found another coolant leak. It seems to be coming from the timeing cover. There must be a freeze plug in there that is weeping. I get about half a jigger of coolant in a 24 hr. period. I called the rebuilder and he had me check the oil to see if there was any water. The oil had changed color after about 15 minutes of run time, but I could not see any water. The change in color may have been from some of the grease etc. that was used during the rebuild. The rebuilder is sending me some GM coolant sealing tabs to see if that will stop the weeping. If that does not work, it looks like the motor will have to be pulled and go back to the shop, OR it looks like you could get the timeing cover off with the engine still in the truck. Remove radiator, support the engine, remove front motor mount, remove pulley, remove timeing cover and replace the freeze plug ?? Posssible?? Quote Link to comment Share on other sites More sharing options...
MBF Posted August 27, 2008 Report Share Posted August 27, 2008 Check under the waterpump and see if you have any seepage where it bolts to the block. You could also have something weeping (rad or bypass hose or bypass housing) that is trickling down and dripping on the timing cover. Think positive. Like the old Piel's beer commercial-"I was told to cheer up things could be worse-so I cheered up and sure enough things got worse". Mike Quote Link to comment Share on other sites More sharing options...
Jerry Roberts Posted August 29, 2008 Report Share Posted August 29, 2008 I found another coolant leak. It seems to be coming from the timeing cover. There must be a freeze plug in there that is weeping.... unquote Do any of the bolts that hold the cover on , go into the water jacket ? I don't remember . If so than sealing those bolts would be an easy fix . Quote Link to comment Share on other sites More sharing options...
streamer Posted August 30, 2008 Author Report Share Posted August 30, 2008 Good point. But either way I will have to remove the radiator etc. to get the bolts that hold the cover on. I tried the sealing tabs that the builder sent me and all the small weeps in the radiator core stopped leaking right away. Unfortunately the leak from the timeing cover did not, it actually got worse!!. The drips seem to be oozing out from the gasket at the very bottom of the cover. I will call the rebuilder on Tuesday to give him the good news. ANYONE out there know if in fact the cover bolts go into the water jacket?? Thanks Quote Link to comment Share on other sites More sharing options...
Jerry Roberts Posted August 30, 2008 Report Share Posted August 30, 2008 steamer , Go over to the P-15-D24 site and do a search on timing cover water leaks . The short answer is , yes , some of the bolts do go into the water jacket . the bolts are location specific and have some type of special marking on them and use special cupped sealing washers . Some of the meaages in that thread are dated 7-1-07 Quote Link to comment Share on other sites More sharing options...
streamer Posted August 30, 2008 Author Report Share Posted August 30, 2008 steamer , Go over to the P-15-D24 site and do a search on timing cover water leaks . The short answer is , yes , some of the bolts do go into the water jacket . the bolts are location specific and have some type of special marking on them and use special cupped sealing washers . Some of the meaages in that thread are dated 7-1-07Thanks for the information. I went over to that forum and sure enough, the information on the timing cover leak is just what I needed. When I call the rebuilder my first question will be about those bolts and the use of sealant. I hope the bolts are the problem -- not the freeze plug. Now Jerry, what about my clutch problem?? Quote Link to comment Share on other sites More sharing options...
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