Speed six chain issues
Discussion
Anyone who has had chain issues, half time bearing issues, please can you post or PM me. Sorry no finger follower, oil leaks, head gaskets, over heating etc just chains and half time bearings
Interested to hear about engine size (3.6/4.0), year, crank material if know or if not red rose, S or standard. Anyone with a crank that had the extended nose please tell me what you can esp. about chain issues.
Many thanks
Cheers, J
Interested to hear about engine size (3.6/4.0), year, crank material if know or if not red rose, S or standard. Anyone with a crank that had the extended nose please tell me what you can esp. about chain issues.
Many thanks
Cheers, J
Its the early cars where there were chain failures I am interested in. I am familiar with the HT bearing and its apparent weakness, but also if anyone who has an HT bearing failure could reply I'd really appreciate it, especially if this was in a steel crankshaft engine, but let me know either way 3.6/4.0/steel crank (not all RR or S had steel cranks so if you don't' know no probs, let me know what you know pls)
Cheers J
Cheers J
Ummhhh. Bumped into someone who had helped someone who had trouble with one of these. Headline was snapping crankshaft nose at high revs. In depth questioning didn't reveal much, suspected the usual "Trouble engines those, stick to a push rod iron motor" attitude but it wasn't quite like that. basically it wouldn't hold cam timing at high engine speeds and eventually it snapped the nose off.
What I don't know is;
Model/year/crank material/capacity (although suspect 4L)/revs attempted.
The engine builder is pretty clued apparently hence he saved it a couple of times when it started to loose cam timing, how he saved that I don't know. I don't know the end result other than he stays clear of the SP6 now. I do know it left his shop with a different damper on the nose,
My chain question wasn't triggered by my hearing about this, it stems form my doubting the ability of ADI as a performance crankshaft material (despite there being a lot of people with much bigger brains than me writing things that say different) and the reported chain failures in early engines and the still current HT bearing failures. The early engines didn't have a long nose, they didn't have an HD fitted, all of the timing cases I have seen have been modified at the factory with a hole drilled and an oil seal with a screwed on retaining ring. Some cranks were extended with a bolt on bit.... ummhhh nasty.
If anyone has experienced a chain failure, punch in what you know please.
Ta
J
What I don't know is;
Model/year/crank material/capacity (although suspect 4L)/revs attempted.
The engine builder is pretty clued apparently hence he saved it a couple of times when it started to loose cam timing, how he saved that I don't know. I don't know the end result other than he stays clear of the SP6 now. I do know it left his shop with a different damper on the nose,
My chain question wasn't triggered by my hearing about this, it stems form my doubting the ability of ADI as a performance crankshaft material (despite there being a lot of people with much bigger brains than me writing things that say different) and the reported chain failures in early engines and the still current HT bearing failures. The early engines didn't have a long nose, they didn't have an HD fitted, all of the timing cases I have seen have been modified at the factory with a hole drilled and an oil seal with a screwed on retaining ring. Some cranks were extended with a bolt on bit.... ummhhh nasty.
If anyone has experienced a chain failure, punch in what you know please.
Ta
J
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