exhaust bolts

[dybamx]

I need new exhaust on my 92? 250 Timberwolf. I am afraid that I will snap the bolts off in the head when I try to loosen them. I was wondering if it might be better to warm the engine up first as the aluminum should expand more than the steel bolts

[dybamx]

59 views and no ideas? 

[LT80]

It won't hurt to warm it but I don't know how much it will really help. A good whack with a hammer on the bolts first usually helps.

[Frank Angerano]

I’ve had this problem. Lots of penetration oil spray on over a period of a day or so. Then warm the engine and crank away. They should come out. 

[dybamx]

these are blind bolts, into the head. penetrating oil isn't going to help. I think I'm just going to try and adapt the old pipe to the new without taking the flange loose. 

[Frank Angerano]

Can you post a pic of the bolts ?

[dybamx]

I'll take some later

 

Edited October 29, 2017 by dybamx
oops

[davefrombc]

Are they  bolts  or  studs? Usually such  as exhaust  manifolds  or   pipes  in the  case of   single  cylinder  engines are  connected  using  studs into the  engine  and  nuts  to  secure  the  pipe to  the  exhaust ..   Some  penetrating  oils  will wick  into  nuts ,  studs  or  even  blind  bolts ..  Warming  the  engine  might  help,  but  be  careful  of  fire  after  spraying  penetrating  oil. If  the  stud nuts  or   bolts  don't  break  loose   fairly easily , try  tightening a  little  and  then  loosening .. "rock"  them  a  little  without  over torquing in  either  direction  also  helps  break  a stubborn  bolt/ nut  loose.

[dybamx]

they are bolts, if they were studs I would just be soaking them with penetrating oil

 

[dybamx]

[Frank Angerano]

Soak the sh** out of them with penetrating oil. And let them sit. They will come loose 

[Pete van veen]

Heat up studs then spray with penetrating oil it wil follow the treads in once colded it will usually come out

[Ajmboy]

10 hours ago, Pete van veen said:

Heat up studs then spray with penetrating oil it wil follow the treads in once colded it will usually come out

Heat always helps. I usually use mapp gas. 🔥