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Rover 4.2 cross bolted?
Posted: Thu Sep 15, 2011 6:23 pm
by RiktheLogger
Hi all,
Am I right in thinking a 4.2 Rover is cross bolted at the bottom end?
Looking at maybe taking one on with a split liner. Rebore and new liners?
Regards,
Rik.
Posted: Thu Sep 15, 2011 6:45 pm
by softdash3.9
I am pretty sure they aren't crossbolted
My Late '94 RR 3.9 V8 Classic it has a serpentine front end, pads for crossbolting, but no bolts
It did go porous
however and now has top hat liners
Posted: Thu Sep 15, 2011 6:53 pm
by RiktheLogger
Aye, the 3.9 was not cross bolted but if memory serves, the 4.0s and bigger were. Just wanted to confirm before I buy yet another dead project engine much to the dismay of my better half!!
Posted: Thu Sep 15, 2011 7:31 pm
by softdash3.9
Yes, the 4.0 and 4.6 are crossbolted as fitted to P38 2nd generation Range Rovers and beyond.
4.2 was fitted to Classic LSE only, in 2 variants std front cover and serpentine (with a distributor) as per my 3.9
Posted: Thu Sep 15, 2011 7:37 pm
by RiktheLogger
AHa!
Knew there was something like that! Thanks for that Royston, better put it on hold then! Akready got a 3.5 as a project so might just battle on with that.
Regards,
Rik
Posted: Fri Sep 16, 2011 9:12 am
by POAH
the intermediate 3.9 and 4.2s with the serp front end have the bits for cross bolting but need to be drilled.
Posted: Fri Sep 16, 2011 9:45 am
by SimpleSimon
POAH wrote:the intermediate 3.9 and 4.2s with the serp front end have the bits for cross bolting but need to be drilled.
And you will need the correct main caps to suit as they are not broad enough to meet the side of the crankcase
Posted: Fri Sep 16, 2011 11:48 am
by DEVONMAN
SimpleSimon wrote:POAH wrote:the intermediate 3.9 and 4.2s with the serp front end have the bits for cross bolting but need to be drilled.
And you will need the correct main caps to suit as they are not broad enough to meet the side of the crankcase
Most 'interim' blocks have the correct mains caps for a crossbolt conversion, EXCEPT those made between Jan and April 1994 which have the earlier type caps.
Cheers Denis
Posted: Fri Sep 16, 2011 12:16 pm
by SimpleSimon
DEVONMAN wrote:SimpleSimon wrote:POAH wrote:the intermediate 3.9 and 4.2s with the serp front end have the bits for cross bolting but need to be drilled.
And you will need the correct main caps to suit as they are not broad enough to meet the side of the crankcase
Most 'interim' blocks have the correct mains caps for a crossbolt conversion, EXCEPT those made between Jan and April 1994 which have the earlier type caps.
Cheers Denis
That clears that one up then
don't you just love the RV8 variations
Posted: Fri Sep 16, 2011 4:57 pm
by softdash3.9
Here's a photo of my 3.9 Serp (38A ser No)
Std main caps not crossbolt (I fitted ARP main stud kit)
Posted: Fri Sep 16, 2011 7:16 pm
by Wotland
