Remanufatured Injection Pump Cold Start

[wewantutopia]

Hi All,

I just got a remanufactured IP, and it is identical to my old one (the original for the car) except that it doesn't have anywhere for the extra assembly for the cold start lever.

The original has an assembly with stops so the lever can only move so far in either direction and a spring dealy. The new one doesn't even have the holes in the body that the assembly would attach 2 (2 holes for bolts). It does, of course, have the cold start lever which moves and behaves fine.

Should I worry about this? What will the effect be without the assembly?

Thanks!

[bbob203]

Where did you buy it? any pics?

[82vdub]

The early style IP's just had the cold start advance, and sometime in the mid 80's, that assembly got combined with a spring assembly and arm that would raise the idle speed of the engine when the cold start lever was pulled. That should be the only difference. The idle increase is nice for those really cold mornings when the car would nearly shake itself apart, but other than that, it's essentially the same pump.

Just FYI, the pumps with the idle speed adjustment are usually more $ to buy rebuilds. If you're sending your old pump back for a core return, 1) will they accept it back because it's not identical to the unit they sent, and 2) do you want to send them a core that's typically worth more than the standard IP's?

[bbob203]

Yep.82 hit it. What I was Gonna say once I had a bit more info. If I were you I would get the correct pump It helps a lot! Though some say the earlier pump are better in different aspects of power and economy. Overall though the idle bump is nice. If your good with meticulous work you could put the idle bump assembly on your new reman pump. You would have to switch the pump top cap I think.

[TylerDurden]

If I understand the OP correctly, the small bracket with lever-stops was not included. That bracket usually is held in place by the screws for the timing-piston cover (where the CS shaft comes through).



@wewantutopia: Are there no screws holding that cover by the CS shaft? (The pic shows the screws with yellow goop)

[wewantutopia]

Thanks for the replies.

I bought the pump from a large VW parts retailer (a competitor to this site so I wont specify) so I should be able to swap it. I checked and did order the correct one.

Here are some pics of the old pump (Ignore the copper washers on the banjo bolt. I was in a pinch and they worked!)







In the first and second pictures, the assembly is the vertical shaft on the left of the photo. In the second and third photo I'm trying to show how it is connected to the body.

Here are some pics of the new pump







You can see in the second and third photos there is no assembly and no place to attach one to the body.

So... it seems like I have the 81-84 pump.

I found the #s on the pumps but I'm not sure what is pertinent.

On the original pump:
NR 480 494 185
224 BS 4008
068 130 081 c

On the new pump:
NR 460 494 181
068 130 110 B (not sure if it is a B or 6 or

Can anyone tell anything by these numbers?

If it is the wrong one, I'll call tomorrow and see if they'll send the right one. This is my daily driver and it is still sitting as it is in the pics of the new pump. I didn't realize the difference until I went to hook up the cold start cable. Hopefully they'll take it back

[82vdub]

The new pump will work. I would just call and ask them about the difference of pumps and if there's any problem if you send the newer style back to them for a core return, and maybe even ask (or hint) that you should maybe get more of a $ return for sending that style pump back. Never hurts to ask.

[Dakotakid]

The 081C pump was a pump which is commonly found on 1986 models. It is the pump I prefer....not due to the high idle capabilities....but, for the more robust bottom end.

And, yes, you can feel the difference in the two pumps.

[TylerDurden]

I would send it back. If the seller is unwilling to take it back, I'd demand a partial refund.

The original pump has the idle increase, which is a significant improvement over the older pump.

With the older style, in cold weather, the engine may only run at ~500rpm and stumble before warming up for 2-3 min. When warm, the idle may be too high. The newer style allows proper idle while cold (CS lever pulled) and after the engine is warm (CS lever pushed-back).

While it is not an engine killer, the cold low idle means you gotta sit with your foot on the pedal, when you could be out scraping the windows while the engine warms up.

[wewantutopia]

I was able to exchange the pump for the correct one.

Just got it installed over the weekend... what a difference! It starts in 2 or 3 cranks after sitting overnight without a block heater and is noticeably more powerful (which isn't saying much, but still!).

[Fatmobile]

Thanks for the update.
So you sent yours back as a core?
What's a core worth these days.

[wewantutopia]

Thanks for the update.
So you sent yours back as a core?
What's a core worth these days.

I haven't yet but I will. The core charge is $110.