LM4 Small Block

I found a low mileage (150,000 km) LM4 truck engine at a local scrap yard that was said to have great compression. The guys on the phone were very helpful and had the engine delivered to me in a couple of days. I spent the next week or so disassembling and cleaning every surface to bring it to a respectable condition.

Couple of the bolts snapped on the intake manifold which was a huge pain in the butt. I managed to pull a couple out using an extractor and a screwdriver, but the third one wouldn’t budge. We even tried dry ice to loosen it, but nothing worked. At the end I just decided to abandon it. Its located in the centre of the manifold, so its not crucial when using eBay headers.