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M52B28 Engine Issue
Posted: Thu Mar 31, 2016 8:50 pm
by Bingo369
Just stripped my 96 M52B28 engine to give it a freshen up due to the oil light taking a while to go out when starting. The engine didn't burn any oil and a compression check on all cylinders had between 200-220 psi. When I removed the pistons I noticed black marks in the walls of the cylinders. I have given the cylinder walls a light hone but this hasn't removed the marks. Any ideas what these marks are? I believe the engine is a post-nikasil engine.
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Re: M52B28 Engine Issue
Posted: Mon Apr 04, 2016 11:44 am
by HairyScreech
If that's not an iron liner block then you may have just killed it by giving it a hone!
Re: M52B28 Engine Issue
Posted: Fri Apr 29, 2016 8:36 pm
by Bingo369
If you see the first pic it's got the tag for a steel liner block !!! Any body any ideas ?
Re: M52B28 Engine Issue
Posted: Mon Jun 04, 2018 8:05 pm
by Yasnick
Looks like corrosion or pitting. We can clearly see the liners..
Re: M52B28 Engine Issue
Posted: Tue Jun 05, 2018 11:50 am
by Motorhole
Yasnick wrote:Looks like corrosion or pitting. We can clearly see the liners..
Yeah, if you can see the liners, it's steel liners. Nikasil was just a hard plating - I've got one of those blocks in my garage
Seconded - looks like water damage.
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