V6 BOA/BOB Camshafts
Discussion
Hello,
I am currently rebuilding a 24V BOA Ford engine out of a 1990 Granada. The condition of the engine upon rebuild was terrible, with oil changes never seemingly having been made. The cam covers are black and cams are discoloured dark brown. The bottom end has been thoroughly refreshed. The cylinder heads have been thoroughly cleaned and now bolted back into place with a new chain ready to install and new hydraulic tappets.
The original camshafts are BOA, using the duplex timing chain sprockets. I have cleaned them, as much as possible using paraffin – but the condition of them shows some marking, but not with any scoremarks under the nail test.
However, I do have a set of BOB camshafts which are in much better condition, but they are fitted with a different type of sprocket. My enquiry is two fold:-
1. Could I simply take off the sprockets at the end of the cam shaft and fit the BOA sprockets and bolt the BOB cams in place of my BOA cams onto the engine? I have read somewhere on Ford forums that this is a viable option.
2. If I do replace the BOB cams, can I re-use the existing camshaft bearing caps? They look usable (whilst not brand new). My query really is because the cams are showing some wear on the cam bearing faces – would this be material which could have come off the cam bearing caps and thus making them oval or over size? But looking visually they seem OK, and with a film of oil between cam and cam bearing cap – in theory the cam would never sit in the bearing anyway – only on the film of oil between the two.
Ideally I would buy new built up heads with new cams installed, but a) getting hold of this option is like rocking horse hunting and b) I simply cannot afford that route at this point in time, for effectively what is a ‘toy’.
Advice appreciated.
Chris
I am currently rebuilding a 24V BOA Ford engine out of a 1990 Granada. The condition of the engine upon rebuild was terrible, with oil changes never seemingly having been made. The cam covers are black and cams are discoloured dark brown. The bottom end has been thoroughly refreshed. The cylinder heads have been thoroughly cleaned and now bolted back into place with a new chain ready to install and new hydraulic tappets.
The original camshafts are BOA, using the duplex timing chain sprockets. I have cleaned them, as much as possible using paraffin – but the condition of them shows some marking, but not with any scoremarks under the nail test.
However, I do have a set of BOB camshafts which are in much better condition, but they are fitted with a different type of sprocket. My enquiry is two fold:-
1. Could I simply take off the sprockets at the end of the cam shaft and fit the BOA sprockets and bolt the BOB cams in place of my BOA cams onto the engine? I have read somewhere on Ford forums that this is a viable option.
2. If I do replace the BOB cams, can I re-use the existing camshaft bearing caps? They look usable (whilst not brand new). My query really is because the cams are showing some wear on the cam bearing faces – would this be material which could have come off the cam bearing caps and thus making them oval or over size? But looking visually they seem OK, and with a film of oil between cam and cam bearing cap – in theory the cam would never sit in the bearing anyway – only on the film of oil between the two.
Ideally I would buy new built up heads with new cams installed, but a) getting hold of this option is like rocking horse hunting and b) I simply cannot afford that route at this point in time, for effectively what is a ‘toy’.
Advice appreciated.
Chris
From others experiences fitting the Cosworth version of the Cologne V6 seems to be a very expensive way to gain little extra power?
If you're determined to proceed at least give yourself a fighting chance by starting with a half decent engine, not one that looks like it's never been serviced!
Edited by phillpot on Thursday 22 February 11:18
Have you seen this thread?. The Cossie conversion has been well covered on this Forum in the past so there's plenty of experience to draw on.
As per Ray above, the Jag engine from the X-Type/S-Type was a more cost effective conversion. As I'm sure you know, Cossie engine parts are very expensive.
Buying a V8S might be cheaper in the long run though, which ever way you go
As per Ray above, the Jag engine from the X-Type/S-Type was a more cost effective conversion. As I'm sure you know, Cossie engine parts are very expensive.
Buying a V8S might be cheaper in the long run though, which ever way you go
Cossie or S type engine all looks great to me.
But a V8S oh very nice.
Are the parts to convert it to a V8s readily available still or is the cost of sourcing or rebuilding a good RV8 etc more expensive than the Jag conversation for instance?
Ah,,, you’ll need a new bonnet ? Is that correct.
It’s starting to sound expensive.
What’s it cost owners to convert to the Jag roughly speaking.
Damien did a great job. Really enjoyed that thread
But a V8S oh very nice.
Are the parts to convert it to a V8s readily available still or is the cost of sourcing or rebuilding a good RV8 etc more expensive than the Jag conversation for instance?
Ah,,, you’ll need a new bonnet ? Is that correct.
It’s starting to sound expensive.
What’s it cost owners to convert to the Jag roughly speaking.
Damien did a great job. Really enjoyed that thread
It really makes no sense to try and convert a V6 to a V8. Lots of differences including chassis mods, wider track, rear discs etc. You also end up with a car that most buyers would be wary of, and possibly tricky to insure. If you’re up for a project try and find a cheaper V8 although there’s not many around as only 400 or so were made. You could try a post in the TVR S Facebook group, there must be many that are sat in garages around the country that haven’t seen the road in a few years….
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