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Post by boggissimo on Aug 31, 2022 15:07:23 GMT
I'm getting ready to take out the dead engine and replace it with another one. Seems to be some debate about whether to leave the gearbox in the car or not - anyone done it at home and have an opinion? I've not done it either way, so all tips appreciated! I've watched a fair few videos on the 'choob and there are lots of variations in how people do it.
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Post by Zed. on Aug 31, 2022 15:49:28 GMT
personally I'd split them & lift the engine out (jack under gearbox to support)
as to removing as a complete unit - you'll be splitting the engine & box when removed so double-handling?
Rich.
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Post by dickie on Aug 31, 2022 20:22:40 GMT
What Zed Said,
Its easier to take the engine out first.
You need less height and space in front of the car to just take the engine out.
I have used about 1m of extensions to get at the bellhousing bolts from underneath.
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Post by boggissimo on Sept 12, 2022 8:42:03 GMT
Next question, I have an engine stand now and will put the old engine on it so I can (eventually) strip it down and work out what went wrong. Of course I don't have a spare set of the bolts that hold it to the gearbox, so what am I supposed to use to hold it on the engine stand? The existing ones don't seem to be a standard/shared part (part number 99796-1260) and I could get some used ones but that seems a bit daft. Anyone know what size/thread they are?
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Post by Zed. on Sept 12, 2022 18:47:01 GMT
Next question, I have an engine stand now and will put the old engine on it so I can (eventually) strip it down and work out what went wrong. Of course I don't have a spare set of the bolts that hold it to the gearbox, so what am I supposed to use to hold it on the engine stand? The existing ones don't seem to be a standard/shared part (part number 99796-1260) and I could get some used ones but that seems a bit daft. Anyone know what size/thread they are? I've spare standard bolts but wont be able to post for a few days as busy  think they are m12 x 1.5mm pitch? and about 3" (75mm) in length as standard so would need longer if using an engine stand... or.... www.g19engineering.com/view.php?cat=75&ViewProduct=169&page=1£8 (+ vat & post?) Rich. |
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Post by boggissimo on Sept 13, 2022 8:10:57 GMT
Next question, I have an engine stand now and will put the old engine on it so I can (eventually) strip it down and work out what went wrong. Of course I don't have a spare set of the bolts that hold it to the gearbox, so what am I supposed to use to hold it on the engine stand? The existing ones don't seem to be a standard/shared part (part number 99796-1260) and I could get some used ones but that seems a bit daft. Anyone know what size/thread they are? I've spare standard bolts but wont be able to post for a few days as busy think they are m12 x 1.5mm pitch? and about 3" (75mm) in length as standard so would need longer if using an engine stand... or.... www.g19engineering.com/view.php?cat=75&ViewProduct=169&page=1£8 (+ vat & post?) Rich. Thanks - I finished getting the bolts out last night, so just the two engine mount nuts to remove and it should come out. I'd forgotten they need to be longer so now the bolts are out I can measure the thread and get some long ones from a hardware shop. If they don't have anything suitable then a tenner for those ones from G19 will be good, thanks for the link.
The replacement engine will go on the stand while I do the cam belt etc and check it over, then when that's in the car I'll put the original engine on the stand to strip it down. Of course that means there will be a time when both engines are out, and I only have one stand.... it's like those puzzles of sending a wolf, a chicken and some grain across the river!
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Post by dickie on Sept 13, 2022 16:13:18 GMT
I have built an engine up on a Heavy duty Black and Decker workmate with board on top. ( its the one currently in the car )
At the moment I have an engine under a table in the garage and another on in bits on the workbench.
I found working on the workmate was fine, either on the top face of the block with suitable protection or stood on its tail, or the sump depending on state of disassembly assembly.
Have fun with it. !!!
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Post by Zed. on Sept 13, 2022 19:33:18 GMT
I have built an engine up on a Heavy duty Black and Decker workmate with board on top done that many times, sometimes without the board on top  even used a barstool that a mate had in his garage (1300 ford crossflow with lotus tc flattop pistons) Rich. |
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Post by Zed. on Sept 13, 2022 19:33:55 GMT
^^THIS  Rich. |
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Post by dickie on Sept 13, 2022 19:45:22 GMT
I built an Austin Seven engine in my bedroom on the desk at age 16 ! ( That was over 40 years ago )
I carried it dowstairs into the garage fitted the flywheel then installed it in the car. I got the timing 180 degrees out though.
I am building another Austin Seven engine next door to the the Mazda engine on the workbench.
The current Austin Seven has been in the family for 40 years now.
Mazda engines are a doddle to build compared to the Austin Seven !!!!!!
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Post by boggissimo on Sept 14, 2022 9:04:50 GMT
^^THIS Rich. Thanks guys, I'm actually quite looking forward to stripping down the old one and seeing what went wrong. Will just have to try to resist upgrading too much when I put it back together or it will turn into a real money pit! |
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Post by dickie on Sept 14, 2022 17:51:57 GMT
Bore it out, forged pistons / rods, upgrade oil pump gears.
Future proof the block. The head can be dealt with anytime you want.
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Post by boggissimo on Sept 15, 2022 8:42:43 GMT
Bore it out, forged pistons / rods, upgrade oil pump gears. Future proof the block. The head can be dealt with anytime you want.
All in good time, grasshopper. Need to get the car back on the road first, finish the Isetta and *then* start getting carried away with the rebuild...
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Post by boggissimo on Sept 15, 2022 8:46:09 GMT
Oh keep meaning to ask, what do people recommend for engine mounts? OEM? Poly? How hard? Want it to be bearable on road, and frankly any replacement will be better than the 30 year old originals, so I'm leaning towards a straight replacement for now.
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Post by scottydugg on Sept 15, 2022 8:53:37 GMT
Used THESE for a couple years until I swapped them out, no issues, but I never experienced stock mounts to compare. |
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le sigh