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TDI Conversions Discussions on converting non TDIs into TDIS. More general items can be answered better in other sections. This is ideal for issues that don't have an overlap and are very special to swaping engines.

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Old August 27th, 2019, 14:49   #1
CarlosVanDango
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Default Reliant Scimitar TDI conversion

Hi just started a new TDI project
i've already done one before details here -> https://forums.tdiclub.com/showthread.php?t=439514
thats all done running great so i thought i'd do it again
the car i'm doing it on is a 1971 Reliant Scimitar

my donor this time is a golf mk4 GTTdi

only issue i've found so far is the wiring is different to the passat i used before, and i haven't got a wiring diagram for the golf
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old August 28th, 2019, 09:31   #2
Zed.
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Quote:
Originally Posted by CarlosVanDango View Post
Hi just started a new TDI project
i've already done one before details here -> https://forums.tdiclub.com/showthread.php?t=439514
need more progress details on the transit thread
and, whats the plan for the 'Slime-Eater'?
Quote:
Originally Posted by CarlosVanDango View Post
only issue i've found so far is the wiring is different to the passat i used before, and i haven't got a wiring diagram for the golf
http://forums.tdiclub.com/showthread.php?t=387649
might help for the wiring, the basic sensor's are obvious (oil/coolant/starter/reverse lighting/vss) and I believe the ecu's all use the same pinout
also, may be of help,
http://www.rwdmotorsport.com/vw-audi...llhousing.html

not the cheapest @ 262.50 but will allow the use of ford gearboxes
will be watching with intrest....
Rich.

Last edited by Zed.; August 28th, 2019 at 09:39.
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Old August 28th, 2019, 10:39   #3
CarlosVanDango
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the transit hasn't changed much just done a few more miles - still been reliable no real issues at all.

tbh i'd pay 260 for the bell housing but i don't want a type 9 box

The plan is to use an RX8 box with an adapter plate, i'm going to try to use the passat starter and flywheel but ideally i could do without the DMF been looking at the B4 passat solid flywheel but it doesn't have the cut outs on the back - need to look see if it there is a crank sensor that it needs to pick up on (and i'm not sure if it will bolt up)
edit- just looked it does have a flywheel sensor

good info on the wiring thread! when i did the passat i bought the haynes manual and it had good diagrams but i've got the one for the golf and it doesn't cover the ecu
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390

Last edited by CarlosVanDango; August 28th, 2019 at 12:13.
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Old August 28th, 2019, 13:56   #4
Zed.
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I've been fancying another transit, my last was a '95 lwb/hightop with the 'epic' td(i) engine but had a few 2.9i v6 lwb's (ambulance & minibus, still got a complete 2.9i conversion in the garage...) 2.5di lwb and a 2L petrol mk2 swb...

Quote:
Originally Posted by CarlosVanDango View Post
i'm going to try to use the passat starter and flywheel but ideally i could do without the DMF been looking at the B4 passat solid flywheel
transverse & inline flywheels differ - the ring-gear is on the gearbox side (transverse) & engine side (inline), may be other diferences but I've never looked closely

also, thought the crank-sensor was on the rear main oilseal (pd??)

as to the bellhousing, was meant as you could re-use the origonal overdrive gearbox (the bellhousings can be re-drilled for other options) but the likes of an rx8 gearbox has an integral belhousing/gearcase so as you say, would need an adapter-plate to the cylinderblock

Rich.
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Old August 28th, 2019, 14:12   #5
CarlosVanDango
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Quote:
Originally Posted by Zed. View Post
I've been fancying another transit, my last was a '95 lwb/hightop with the 'epic' td(i) engine but had a few 2.9i v6 lwb's (ambulance & minibus, still got a complete 2.9i conversion in the garage...) 2.5di lwb and a 2L petrol mk2 swb...
i used a 2.9 ambulance engine to convert another transit i have to fit 24v cossy BOA that was a really nice motor

i see what you mean the scimitar gearbox would be a nice conversion (mine has working overdrive too) but i'm gonna have a go at making an adapterplate i've got a 5 speed rx8 box - i looked at the ratios and the 5 speed suited the pd better than the 6 speed - even though the 6 speed would be good for novelty value
i've still got the flywheel left over from the passat conversion so i'll try to utilise that
my only other issue with turning the engine 90 deg is if i get any problem using a fwd sump but looking at the design it looks ok - i guess it was ok on cornering so i can't really see a problem - also allows me to tilt the engine more vertical which will be better for access - the scimitar engine bay is quite cramped
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old September 28th, 2019, 11:48   #6
CarlosVanDango
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bit more progress
i'm using an RX8 gearbox coupled to the VW engine, I can't find an adapter plate made for this so i've got to make my own. Also after talking to some of the suppliers of these plates i'd be a bit concerned about the manufacturing tolerances, it's ok saying its CAD drawn CNC machined and laser cut if the initial measurements are out.
to make my plate i've copied a VW plate for the engine holes - that is the easy part to get the bellhousing accurate i've stripped off the bellhousing made a brace to bolt the dti onto the crank, made a stand for the engine then rotated the crank round to true up the bellhousing i've then centred the holes i need using a mag drill, swapped the bit out to the correct size, unbolted the bellhousing then drilled the plate, i've repeated this for every hole - very time consuming but guarantees accuracy
the manufacturers tolerance on the centre of the gearbox input shaft to the crank is +/- 0.12mm this way i can get it within that
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old October 18th, 2019, 13:14   #7
CarlosVanDango
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copule of pics taking the engine out

plenty of room for the TDi
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old April 21st, 2020, 11:48   #8
CarlosVanDango
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back on with this
gearbox out

got the starter motor mount lined up and drilled out on the adaptor plate

unfortunatly i need to cut a bit out of the bellhousing but a small price to pay
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old April 22nd, 2020, 11:00   #9
CarlosVanDango
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few more pics
this is the finished plate (gearbox side)

engine side

i had an issue with one of the bellhousing bolts landing on top of the plate bolt so i made this clamp to get round it - should be fine - all the other bolts are ok and the 2 locating dowls fit perfect

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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old April 23rd, 2020, 15:56   #10
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Nice project, I am on the look out for the same car and going to put a tdi in but the 2.5 tdi out of a lt 35 MTDi , what diff you thinking about 2.9? Is it a 3.5 standard , I'm I right thinking the older jag diff gears fit
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Old April 24th, 2020, 12:27   #11
CarlosVanDango
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Quote:
Originally Posted by snakemaster View Post
Nice project, I am on the look out for the same car and going to put a tdi in but the 2.5 tdi out of a lt 35 MTDi , what diff you thinking about 2.9? Is it a 3.5 standard , I'm I right thinking the older jag diff gears fit
not sure on the jag diffs but i have heard they do fit.
i was just thinking of leaving the axle i have in as the ratio is pretty relaxed and i think it will be fine with the Tdi
i looked at mazda boxes and i think the 5 speed has ratios more suited to the Tdi than the 6 speed so i went for one of those
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old April 24th, 2020, 12:43   #12
CarlosVanDango
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engine and box bolted together
1st rwd mazda box'd 1.9Tdi i've seen - anyone know of any others?

close up of the plate (bolts need changing for correct length)

bit of a hassle getting it in

it's sat like that (well a bit further) going to continue tomorrow
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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old April 25th, 2020, 04:08   #13
CarlosVanDango
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got it sitting in place now

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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old May 4th, 2020, 14:53   #14
CarlosVanDango
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made the mounts and have the engine sat in place now



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my 1970 mk1 Transit Tdi build thread http://forums.tdiclub.com/showthread...86#post4795686
my 1971 Reliant Scimitar Tdi build thread https://forums.tdiclub.com/showthrea...90#post5532390
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Old May 7th, 2020, 19:21   #15
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Your neighbors must love you doing that on the street! Wouldn't get away with that around here.

Neat project.
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