exhaust manifold

[mkei]

I have a 97 12v, my exhaust manifold needs to be replaced. Does anyone have any tricks to remove these old bolts with ease?

thanks Mike

[SPLnut]

Pb blaster...spray it a few times and allow plenty of soak time...And use a good snug 6 point socket

[pro99]

Theres not much more you can do but good luck :thumbsup

[flagmanruss]

Hi,
I haven't tried a "dry" exhaust (small boats have a water jacketed "wet" exhaust) but am a retired boat mechanic... most everything could be counted on to be quite rusty. By all means, use plenty of penitrant, a little at a time. Six point sockets is also a good tip... If the American size is loose, go to an undersized metric and hammer it on until you get one to bite. Put a breaker bar on it, not a rachet, until you get it started. Try loosening but also tightening. Give the breaker bar a wack with a hammer in each direction to jar it... then oil it again. Repeat both until you get it. Don't get anxious... give the oil plenty of time to work.
Russ

PS Many times, after a job, I'd have to put the socket in the vise to drive the bolt back out of them with a punch... Buy Craftsman sockets, when ya break 'em they're guarenteed.

[farmboysdiesel]

Sounds like good advice to me. :thumbsup

[mkei]

thanks for the advice, sounds good

mike

[avshi750]

i just swapped my old manifold for an HTT manifold on my 12v last night.

actually easier install than i thought.

couple of tricks i figured out while i was wrenchin':
*some of the bottom bolts are more easily attacked from under the truck.
*don't forget to spray the exposed parts of the stock manifold bolts with oil, not just the bolt head.
*lines running ontop of the maifold really get in the way, i had to use a closed end wrench with a breaker bar to get the bolts out of the front of the block.
*i dropped the old manifold out the bottom of the engine bay but installed the new manifold from the top - it was just easier for me.