1982 SD1
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- ged
- Forum Contributor
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- Joined: Tue Feb 10, 2009 2:09 pm
- Location: North Wales via NZ
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Hi Paul,
Sounds like a plan mate. I'll let you know when I'm up & running. I stripped it all down today & everything is in excellent condition. As for the liner it's only dropped by about .006" and I did consider just decking the block but as I've already got it stripped I may as well do the job properly. I'd be really gutted if it didn't work. My cam gear & oil pump cover just show a very light polish so the oil I'm using seems to be doing the job. While I'm waiting for the block to come back I thought I'd rip the original heater unit out & exchange it for a later model that I have in my spares. The heater matrix is a lot easier to change in case of problems in the future.
Ged.
Sounds like a plan mate. I'll let you know when I'm up & running. I stripped it all down today & everything is in excellent condition. As for the liner it's only dropped by about .006" and I did consider just decking the block but as I've already got it stripped I may as well do the job properly. I'd be really gutted if it didn't work. My cam gear & oil pump cover just show a very light polish so the oil I'm using seems to be doing the job. While I'm waiting for the block to come back I thought I'd rip the original heater unit out & exchange it for a later model that I have in my spares. The heater matrix is a lot easier to change in case of problems in the future.
Ged.
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- Location: Thatcham Berkshire
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- Forum Contributor
- Posts: 343
- Joined: Tue Mar 31, 2009 11:41 am
- Location: Thatcham Berkshire
I've also read all that sales hype on the Rpi site about the costcast blocks Robrover mentioned.
I have often thought of changing my 3.9 for a 4.6 at some point, however if I do I will make sure it is a top hat liner block not a costcast as intended.
Ged, Sounds like you might be waiting a while before you get your block back, did Rob give you at turn around time?
I have often thought of changing my 3.9 for a 4.6 at some point, however if I do I will make sure it is a top hat liner block not a costcast as intended.
Ged, Sounds like you might be waiting a while before you get your block back, did Rob give you at turn around time?
- ged
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- Joined: Tue Feb 10, 2009 2:09 pm
- Location: North Wales via NZ
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Gidday Rob,
The block was out of a 96 Rangie. Was rebored +.020" . In my opinion the liners are too thin to start with. I always worked on a minimum 3mm wall thickness when I was machining top hat liners in the early 80s in NZ. As for overheating it crept up to the 100C mark a couple of times but this was after the problem started. I put it down to a head gasket weeping at first as I was using tins & it has about 20,000 miles on it now. The coolant system started pressurising ( not much as I wasn't losing any coolant) just enough to force the coolant below the sensor & illuminate the warning light If I ran it without the radiator cap everything was fine but as soon as I revved it there was a small stream of bubbles visible.
Paul
2 weeks mate but I'll have it reassembled & back in over a weekend.
The block was out of a 96 Rangie. Was rebored +.020" . In my opinion the liners are too thin to start with. I always worked on a minimum 3mm wall thickness when I was machining top hat liners in the early 80s in NZ. As for overheating it crept up to the 100C mark a couple of times but this was after the problem started. I put it down to a head gasket weeping at first as I was using tins & it has about 20,000 miles on it now. The coolant system started pressurising ( not much as I wasn't losing any coolant) just enough to force the coolant below the sensor & illuminate the warning light If I ran it without the radiator cap everything was fine but as soon as I revved it there was a small stream of bubbles visible.
Paul
2 weeks mate but I'll have it reassembled & back in over a weekend.
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- Top Dog
- Posts: 2334
- Joined: Sat Aug 18, 2007 5:09 pm
- Location: Sidcup, Kent, UK
Chris,
Thats a bit odd considring you can now get 20thou. oversize Rover pistons,
Before I built my 4.35 engine I spoke to Ian Richardson at Wildcat and he told me the max overbore in a standard 94mm liner was 1mm. hope he's right as I now have 94.89mm. pistons.
PS the rebore only cost £200 so going DIY would probably cost a lot more by the time you got all the kit to do it.
Kevin.
Thats a bit odd considring you can now get 20thou. oversize Rover pistons,
Before I built my 4.35 engine I spoke to Ian Richardson at Wildcat and he told me the max overbore in a standard 94mm liner was 1mm. hope he's right as I now have 94.89mm. pistons.
PS the rebore only cost £200 so going DIY would probably cost a lot more by the time you got all the kit to do it.
Kevin.
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- Top Dog
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- ged
- Forum Contributor
- Posts: 668
- Joined: Tue Feb 10, 2009 2:09 pm
- Location: North Wales via NZ
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Hi All,
I got bored waiting for my block to be fixed so I decided to strip my tranny & give it an "overhaulin".
Anyway, the reason being it used to whine a bit in first & second. I can't complain though it was only used as a stopgap until I could afford something better & I really didn't expect it to last. Upon inspection (bear in mind It's of an unknown mileage) It's in pretty good nick. Total cost for a rebuild which included gaskets,seals,synchro's,bearings & selectors came to around £150. The biggest hassle was making the tools needed but even so for a couple of day's work I'm well pleased with the result.
Ged.
I got bored waiting for my block to be fixed so I decided to strip my tranny & give it an "overhaulin".
Anyway, the reason being it used to whine a bit in first & second. I can't complain though it was only used as a stopgap until I could afford something better & I really didn't expect it to last. Upon inspection (bear in mind It's of an unknown mileage) It's in pretty good nick. Total cost for a rebuild which included gaskets,seals,synchro's,bearings & selectors came to around £150. The biggest hassle was making the tools needed but even so for a couple of day's work I'm well pleased with the result.
Ged.