Cold Start Device on Bosch VE

SD diesels were widely available in the US in the 1981-86 Datsun/Nissan 720 pickups, and in Canada through '87 in the D21 pickup.

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after oil
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Cold Start Device on Bosch VE

#1

Post by after oil » 13 years ago

these hoses come from under the oil filter and go to the IP
Image


look down the center of this photo, between the rubber hoses for a cloth braid looking hose. it is the 2nd of the two:
Image

while on the phone with nissan to ask about the oil cooling return hose i squeezed this hose and it felt like it cracked! i ran the motor and it didnt seem to leak (yet)
is there a digram from the FSM that shows these hoses so tomorrow when im at the dealer we can have some clartity?
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van

glenlloyd
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#2

Post by glenlloyd » 13 years ago

Some Bosch VE pumps have an idle control assembly that's triggered by coolant temperature, perhaps yours has a setup like this, although the ones I've seen don't use hoses that small.

steve a
Last edited by glenlloyd 13 years ago, edited 1 time in total.
97 Jetta TDI, 86 VW Golf D
89 VW Fox diesel, 92 MB 300SD W140

gir - won't the sploding hurt?
zim - silence!

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asavage
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#3

Post by asavage » 13 years ago

I like Steve's idea, about the Cold Start Device. On the Maxima's VE-style IP, it advances the base timing and props up the cold idle, until the coolant comes up to temp.

Warning: the VE IPs don't get along with WVO as well as the inline IPs.

I have to say, the pictures are not very revealing. Do you have others?
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

REDNECK
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#4

Post by REDNECK » 13 years ago

are you talking about the two that go from the oil cooler to the head?....via the banjo bolt?
87 D21,SD25.
may she NEVER stop smokin!

REDNECK
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Location:Alberta, Canada

#5

Post by REDNECK » 13 years ago

If you go into Nissan with your s/n they have some really good pics of all the hoses. The only hoses that should have to come from Nissan in that corner is the coolant hose, because of their shape. They use just regular braided line, and you can get that cheaper anywhere but there!......eg. Canadian tire, Napa.....ect.
87 D21,SD25.
may she NEVER stop smokin!

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asavage
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#6

Post by asavage » 13 years ago

after oil wrote:i couldnt figure out how to post bigger pictures, through imageshack, just huge ones. oops.
I'm going to add "local" hosting that is user-controlled -- it's in the works, really.

Meanwhile, upload the huge one(s) here, then PM me to remind me to look there (I have not written a notification script yet), and I'll do something nice.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

after oil
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hoses' part numbers!

#7

Post by after oil » 13 years ago

i went to the dealer today, its a long ferry ride away, but i had other business to do so no biggy.

i still cant say for sure exactly what the hoses are for, but i ordered one of each. and the hose that returns coolant from the oil cooler to the block
are you talking about the two that go from the oil cooler to the head?....via the banjo bolt?
one of the hoses is the only one in canada, its in TO.

ill get them in two weeks when i go back over to the dealer.

the number for the aformentioned coolant return to the block from the oil cooler hose:21308-10G05

the two small hoses that i started this thread about21307-10G07 thats the one with the big curve in it,

and 21307-10G08 is the other.

sorry no scanner. maybe a photo of the diagram?
Last edited by after oil 13 years ago, edited 1 time in total.
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van

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asavage
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#8

Post by asavage » 13 years ago

Different photos (click on any image for larger):

Image Image Image

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asavage
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#9

Post by asavage » 13 years ago

Looks like it could be a CSD. See this thread.

These pics are for the LD series engines.

Image
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

after oil
Posts:173
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Location:powell river, BC, Cascadia

#10

Post by after oil » 13 years ago

i guess im not 100% sure thats what i have, my IP looks different of course. but the hoses do go to a cylinder. if the thing in the dude's left hand in the drawing is a csd, then probably. i didnt really see it in the pic till i looked again. in the morning ill check if it does in fact advance a linkage,
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van

after oil
Posts:173
Joined:13 years ago
Location:powell river, BC, Cascadia

#11

Post by after oil » 13 years ago

yes it does connect to a linkage, therefore i guess it must be a CSD.

Image
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van

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asavage
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#12

Post by asavage » 13 years ago

Looking at the new photos (above), it's clear that that's the Cold Start Device. Similar to a thermostat, it props up the idle speed when the coolant is cold, via the bellcrank. The main shaft it pushes on is to the back of the Bosch VE IP's advancer mechanism.

Image


If it follows the typical VE operation, it makes the advance curve look like this when the CSD is working:

Image
Last edited by asavage 7 years ago, edited 1 time in total.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

after oil
Posts:173
Joined:13 years ago
Location:powell river, BC, Cascadia

#13

Post by after oil » 13 years ago

left hose: coolant return from oil cooler
right hoses: cold start device hoses
click photo for closeup
Image
"... the rare and elusive 1987 D21/SD25, I have come to believe these trucks exist ONLY in the minds of people who own them. " phillip R.I.P.

1987 nissan d21 SD25, canada/2 tank SVO
1993 mitsubishi delica chamonix 4X4 diesel van

davehoos
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#14

Post by davehoos » 13 years ago

This is a later model of injector pump.late 1980's.most of the parts are not interchangable with the older units.some older pumps dont have a lift pump and need an electric pump[bluebird].

some units conect a choke cable to rotate the cold start shaft,and a second cable for a fast idle.
the a/c idle up can work on the belcrank or direct on top.i also have one with a timed delay idle dashpot.

it looks identical to my 1990 LD20II.
and 1993 CD20.[reversed]
the RD28 is similar [6 cyl] with a/c fast idle and manual altutude adjustment.[lever on the other side]..
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