Hi-psi
Full Access Member
So, the '08 Yukon Denali I recently picked up had a broken manifold bolt on the driver's rear.
I ordered a Kral KAP169 clamp and installed it today after work.
From most of the threads I had read, there seemed to be a few different approaches to how best to do it. Ultimately what worked best for me was to undo the two transmission mount nuts out of the cross member, then using a block of wood on the transfer case, jack up the back of the transmission a bit, thus tilting the engine forward, away from the firewall. This free'd up another half to one inch of space back there, and although still a chore, made it a ton easier.
I had saw mention that a lot of times owners had encountered a ground strap occupying the lower bolt hole on the back of the head, and the easiest solution was just to move it to an unoccupied hole in the side of the head which is what I did.
However, a bit unexpectedly, I also encountered a decent sized bracket occupying the top bolt hole on the back of the head that went over towards the center of the engine. Looking up the part number stamped into it (12578463), it appears it's something called a throttle/fuel rail stop. There really wasn't a way to keep the bracket in place or reinstall it with the manifold clamp, so I left it off. Any insight into exactly what it's for, and if there's any concern with having removed it moving forward? Example picture below...
Aside from encountering the unexpected bracket, not a bad job overall and no more nasty exhaust leak.
I did notice that one of the center bolts on the passenger side manifold is also broken/missing. No leak on that side (yet), but I'll probably be ordering one of the single Kral clamps soon to proactively address that one.
I ordered a Kral KAP169 clamp and installed it today after work.
From most of the threads I had read, there seemed to be a few different approaches to how best to do it. Ultimately what worked best for me was to undo the two transmission mount nuts out of the cross member, then using a block of wood on the transfer case, jack up the back of the transmission a bit, thus tilting the engine forward, away from the firewall. This free'd up another half to one inch of space back there, and although still a chore, made it a ton easier.
I had saw mention that a lot of times owners had encountered a ground strap occupying the lower bolt hole on the back of the head, and the easiest solution was just to move it to an unoccupied hole in the side of the head which is what I did.
However, a bit unexpectedly, I also encountered a decent sized bracket occupying the top bolt hole on the back of the head that went over towards the center of the engine. Looking up the part number stamped into it (12578463), it appears it's something called a throttle/fuel rail stop. There really wasn't a way to keep the bracket in place or reinstall it with the manifold clamp, so I left it off. Any insight into exactly what it's for, and if there's any concern with having removed it moving forward? Example picture below...
Aside from encountering the unexpected bracket, not a bad job overall and no more nasty exhaust leak.
I did notice that one of the center bolts on the passenger side manifold is also broken/missing. No leak on that side (yet), but I'll probably be ordering one of the single Kral clamps soon to proactively address that one.
