paul mc Posted March 31, 2013 Share Posted March 31, 2013 I stripped the threads in my cylinder head the other day so I need to get another one. There is a pair from a 3.9 V8 on ebay at the moment, will these fit on my flapper type 3.5 V8? I only ask because they are a good price and there isn't many on ebay. If it will fit are there any advantages or disadvantages to it? Should I use the standard tin or composite head gasket? Thanks and Happy Easter, Paul Quote Link to comment Share on other sites More sharing options...
Quagmire Posted March 31, 2013 Share Posted March 31, 2013 You can swap any rover v8 heads about. The only thing to be careful of is that the later ones which have ten bolt holes are designed for composite gaskets, whilst the earlier 14 bolt hole ones will need tin gaskets to retain your current compression ratio. Quote Link to comment Share on other sites More sharing options...
dirtydiesel Posted March 31, 2013 Share Posted March 31, 2013 I stripped the threads in my cylinder head the other day so I need to get another one. Paul Why not just helicoil the damaged thread? Quote Link to comment Share on other sites More sharing options...
Landowner Posted March 31, 2013 Share Posted March 31, 2013 I've got 4.6 heads on my 3.5 Quote Link to comment Share on other sites More sharing options...
paul mc Posted March 31, 2013 Author Share Posted March 31, 2013 Thanks for the quick replies. What actually happened was the bolt sheared in the clinder head and trying to remove the broken stud from the head has not worked out very well, so I would rather a replacement head than make do with a damaged face against the valley gasket Quote Link to comment Share on other sites More sharing options...
paintman Posted April 1, 2013 Share Posted April 1, 2013 Later heads don't have holes for the outer row of head bolts. Done away with as there is a tendency for them to tip the head slightly. If your replacement heads do have this outer row the usual practice is to fit the bolts to fill the holes but just nip them up. Composite gaskets can be used on earlier engines, but as already said they are thicker so there will be a slight reduction in CR. Can't remember hiow much difference it actually makes. Quote Link to comment Share on other sites More sharing options...
g&t Posted April 1, 2013 Share Posted April 1, 2013 Composite gaskets can be used on earlier engines, but as already said they are thicker so there will be a slight reduction in CR. Can't remember hiow much difference it actually makes. From memory a few years ago - not enough to notice during day-to-day driving. Also if you have a 9.35 CR engine the lower comp. makes it less likely to 'ping' on standard unleaded. Quote Link to comment Share on other sites More sharing options...
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