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Old 19-08-2013, 21:28   #1 (permalink)
 Hughes
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Catastrophic big end failure

I'm new to this forum but been on .org for a few years now, thought I'd try this for some advice. I'd build a 1.6vvc and dropped it in my r25 about a month ago (will upload build thread at some point)
Anyway it was running sweet until last week when it started knocking, turned out it had destroyed the big end bearings in cylinder 2:

That's what was left of it in the sump, amazed it made it home.
What would cause this considering the block I used had about 50k on it and I know these engines rarely go through big end bearings.

For anyone that's interested this is how it's sitting after today:


Crank is scrap so pulled the block out, nearly killed me considering I had to lift it out on my own without a hoist but it's out, just built a 1.6 bottom end today out of a 1.4 block and 1.6 internals that I had so hopefully get it dropped in tomorrow
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Old 19-08-2013, 22:02   #2 (permalink)
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I'm assuming you mean just a 1.6 rather than 1.6VVC? (As the VVC head + mechs don't fit with the 1.4 Liners.

Number of things could cause it, poor oil quality, weak oil pickup, dodgy/old shells, spun shell etc. Hard thing to say really.

Did you use new crank bearing shells when you did your rebuild?
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Old 19-08-2013, 22:15   #3 (permalink)
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it was a 1.6vvc, I know the head doesn't fit the 1.4 liners but the 1.6 liners are the same as the 1.8 so it fits no problem.
I used decent oil and it was only in there for less than a month, the block only had 50k on it which I used. I didn't use new shells on this block but I am on the one I've just built. When I stripped it down there was play on cylinder 1 big end bearings as well so wasn't just a one off.
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Old 19-08-2013, 22:17   #4 (permalink)
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So you're using the VVC mechs?

Wouldn't be surprised the fact you didn't change the bearings has caused an issue. General rule of thumb is always replace the shells once they've been removed, they're not designed to be re-installed.
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Old 19-08-2013, 22:38   #5 (permalink)
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yeah I'm using the vvc mechs.
They hadn't been removed, I was in the process of building a 1.6 block but got a complete 1.6 bottom end for a good price so just used that for the build, was removed from a car where the HG had gone and was given straight to me, I didn't bother pulling apart the bottom end.
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Old 19-08-2013, 22:43   #6 (permalink)
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Ah right. Sounds like you were just unlucky with that engine then.

How did you manage to make it run with the VVC? did you stick a remapped 160 ECU + loom on it? I looked into it when I had my 105ZR but didn't bother as the thicker liners of the 1.4 catch on the larger VVC valves.
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Old 19-08-2013, 22:54   #7 (permalink)
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I hope that's all it was because I don't want the same problem with this block, I just used a 1.8vvc loom and a remapped ecu, did have it running on a standard 160 ecu though, just uploaded the build thread in the project section if you're interested
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