Bad misfire (cylinders 1 through 4), P0300
#21
The cylinder is basically an air pump. If the intake valve isn't opening correctly at the right time and sealing then it won't build pressure. The exhaust valve also needs to seat correctly.
On the thermostat leak, I had the same problem. I ended up replacing the thermostat (has an O ring) and the neck. Problem solved.
#22
Hmmm... the rubber seal that goes around the rim of the thermostat should suffice. If memory serves me correctly, it has a small tab which you use to orient it correctly. If you're doing all that and it still leaks, I would try using some gasket sealer on the surface. Mate the parts, finger-tighten, wait to dry, then torque. Really shouldn't have to do that though.
Last edited by Dodgevity; 07-29-2014 at 12:03 PM.
#23
This is probably the only picture I need to post.
6QvQj6u.jpg
So this is a head replacement + timing chain replacement + god knows what else.
Possibly cheaper to get a new engine and install it. I could do THAT myself, at least.
6QvQj6u.jpg
So this is a head replacement + timing chain replacement + god knows what else.
Possibly cheaper to get a new engine and install it. I could do THAT myself, at least.
#24
Well after sleeping on it, and doing some pondering today, I think my options are as follows:
Pay a lot of money to have it serviced. Two people I have talked to seem to think it'll be north of $2000 to have this fixed, possibly in the neighborhood of $2700 - $3k. They both agree that it probably needs a new head, headgaskets on both, and a timing chain service; just the parts are around $1300 from what I googled. This is not something I feel is within my capabilities.
Just replace the single head and headgasket (along with misc. sundries), and re-time using existing chains. At 140k I'd think the chains should be OK? Will probably still cost well over $1000. Not comfortable with my ability to do this properly, either.
Buy used engine and replace. I could do this. Maybe even swap up to the 2008 model year 300hp 4.7l if I felt wild and crazy...
Pay a lot of money to have it serviced. Two people I have talked to seem to think it'll be north of $2000 to have this fixed, possibly in the neighborhood of $2700 - $3k. They both agree that it probably needs a new head, headgaskets on both, and a timing chain service; just the parts are around $1300 from what I googled. This is not something I feel is within my capabilities.
Just replace the single head and headgasket (along with misc. sundries), and re-time using existing chains. At 140k I'd think the chains should be OK? Will probably still cost well over $1000. Not comfortable with my ability to do this properly, either.
Buy used engine and replace. I could do this. Maybe even swap up to the 2008 model year 300hp 4.7l if I felt wild and crazy...
#25
#26
So you think replace both heads?
#27
You can just do the one head. You can get rebuilts online or just check your local u-pull. http://car-part.com might help
If you do it yourself make sure to set the timing for #1 TDC before you pull the head.
It does look like #2 is the one that pooched.
If you do it yourself make sure to set the timing for #1 TDC before you pull the head.
It does look like #2 is the one that pooched.
#29
#30