So as I alluded to in the Good Morning thread a few days ago I had a busy winter. One of my winter break projects was to replace the heads on the wife's Jeep Liberty.
The repair was fairly strait forward. The hardest parts was torquing the head bolts, aligning the cam chains and the camshaft on the passenger side.
Here are some pictures of the teardown.
Here is putting it back together.
I picked up few specialty tools that make the job easer.
The 3.7L Jeep engine has 3 timing chains, the crank is connected to a balancer shaft and then the cam shafts are attached balancer shaft. To get the chains on and timed correctly you need to have 5 hands or the special tool 522902 made by OTC.
I picked mine up from Amazon. It was well worth the $35 price tag.
I also wanted to get a proper harmonic balancer installer. I first ordered was made by Jeg's. I felt it was a steal at $60.
When I went to use it I noticed that the treaded shank that threads into the end of the crankshaft was way to short. The threads on the crankshaft are set quite deep and only the last inch or so of the harmonic balancer bolt are threaded.
I sent it back and orderer one made by Lisle, 53760. This kit was double the price of the Jeg's kit but it was much better made and the adapters are much longer so it actually hit the threads in the crank.
I also need to pick up a torque angle gauge as the head bolts are torque to yield and a nice set of hose clamp pliers it was time to get a set.
The only tool that I wish I had was the cam wrench, they sell for over $80. The cam on the driver's side naturally lays in the proper position to replace the cam gear back on but the passengers side is about a quarter turn off and must be turned against the valve spring to get it to line up. So I used a pair of vice gaps on a non-machined part of the camshaft to turn it to where it need to be to get the gear on.