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Chrysler 3.7L engine rebuild


AZ Backcountry Explorers πŸ‡ΊπŸ‡²
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(@azbce)
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After months of being down, the Jeep is finally going under the knife for an engine rebuild. 

This thread will cover the Chrysler PowerTech 3.7 liter engine found in several Chrysler vehicles from 2002-2012, including Ram, Dakota, Nitro, Liberty, Grand Cherokee, Commander, Raider, and M80.

I am doing a complete rebuild from the bottom-up and assembling everything myself other than the heads. I will be doing all the work, including assembly, in a driveway. 

Machine work will be completed by a local machine shop to who I will leave a reference in this thread. 

I will acquire quality parts from local wholesalers that are cheaper than ordering online. Worst case scenario, I expect this build to cost under $1,600 even if I need to buy another core.

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AZ Backcountry Explorers πŸ‡ΊπŸ‡²
Posts: 55
(@azbce)
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Day one 

I got the cylinder heads off and discovered leaking exhaust valve steam seals. All three cylinders on bank 1 (driver side) were leaking. It also appears a valve seat was dropping.

Caught it just in time. 

 

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AZ Backcountry Explorers πŸ‡ΊπŸ‡²
Posts: 55
(@azbce)
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Excessive heat from a restricted catalytic converter is suspected of having caused failure in bank 1. You can see the discoloration on the pistons from heat.

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AZ Backcountry Explorers πŸ‡ΊπŸ‡²
Posts: 55
(@azbce)
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Joined: 9 months ago

All timing components looked good. I was surprised how clean it was for 200k miles.

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