Automotive Forums  Where Car Enthusiasts Go to Discuss Cars Online

My friend was replacing his oil pump in his 1984 Chevy Blazer. To do the job, have to remove the engine to get the oil pan off! Great design. Anyways, he was removing the exhaust manifold and broke the bolts. What's the best way to remove it. I suggested going to a Marine hardware store and buy their best brand of rust bolt spray. Then soak the blazes out of it. Then drill and easy-out the bolts or left hand thread and then screw it out. Or try drilling it out. But that is tough. Any Suggestions???
Thanks  

i have a question...

are we talking the three studs sticking out the bottom of the exhaust manifold there the exhaust pipes connect


not the six bolts into each head.... that hold the manifold to the head...

removing the exhaust flange studs....

if there is anything left...  even if it's flush...    a person good with a arc or wire feed welder...   can weld a nut on the broken piece and then unscrew it...

they will usually heat the corner of the flange where the broken stud is threaded though.. the heat expands the iron so the screw is free to be removed....



if you have broken off the bolts into the head.... be sure that you stuff the ports with paper towels first.. so there is no chance of getting drilling debris into the port...  

.  

Just what I was suggesting to him if he drills it out. I've been out for a few days so I will get back to him. I suggested and made for him a guide drill out of stainless steel tubing approx the size to fit into the manifold. Then use the manifold to guide the drill operation with the tube slipped inside it to keep it from drilling sideways. I haven't seen it so I went by what he said. He has done something like this before. I will talk with him tomorrow and will pass off the tip. He knows to cover the openings.  

Update. He got the bolts out . Put it all back together and discovered that too late on the oil pump. Compression was so low in each cylinder. So he's looking for another engine. In the meantime, he got himself another 'newer' blazer, 1989, and he's happy. But still rebuilding his other. Thanks.  

a trick from the other magazines.. find a good 5.7 vortec motor..

drop it in.. you can buy an intake to bolt the carb onto the vortec heads to use the quadrajet or an after market carb.. since this truck is in california.. he might not want to do this..  unless he can swap all the emission devices from the intake..

a lot of people have converted to vortec fuel injection. by just swapping in high pressure fuel pumps into the tanks.   these are outside the frame tanks.. 88 and up were inside the frame tanks..  less chance of a side impact rupturing the fuel tank..

converting to a 88 or later tank is possible depending on the exhaust..  
and if you can find one that has not had holes drilled in it to drain it at the junk yard..

only draw back. the high pressure pumps used on vortec engines come usually with the entire assembly.. and those are over 200 bucks.. and you have to have somebody who knows the system as there are security systems built into the ECM that need to be handled or it will never start..

swapping to a TBI motor can also be done..

this also depends if the truck needs to be smogged..

most 84 trucks in california had feed back carbs.. and those systems were trouble some if not perfect..


there are actually a dozen truck magazines on this site..  and several dozen car magazines..  even a few motorcycle magazines... and one i love.. stupidvideos.com