Good Afternoon,

I got it pretty well straight on removing my injector pump to replace the seal. Two things still have me just a little bit confused. When I get the crank shaft to 15 degrees TDC, does that mean that the number 1 cylinder is where it should be? Also, when I take the IP off and turn the shaft with the serrated wrench in order to put the lock pin in, won't that mess up how I had it timed with the engine? It looks like to me that you would slide the lock pin in before you take it off i.e. when the engine is at 15 degrees TDC, shouldn't the little blade on the IP be in a position to receive the lock pin. I appreciate your time.

Hugh Sr

1984 190d (W201/601)

Yes when at 15deg the blade should be there you could put the lock in then or if it is not perfectly lined up at 15 deg you may have to remove the pump first then move the shaft a tiny bit to get the lock tool in before you put the pump back on. Don

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Red Green "This is only temporary,Unless it works!"

97 E300D 157000 miles
87 300TD ?141k? miles

Turn engine til the lock tool locks. This should be at or around 15 degrees, it's not unusual for it to be off by a degree or two.

If you want you can adjust it to be 15 exact, loosen and rotate the IP with the engine at exactly 15 degrees and at some point the lock tool will lock. I'd do that afterwards though, just lock it as is and put it back in the same spot, then adjust.

Question
I do not know on his particular Model but on my year and model when you use the Locking pin it is 15 degrees After Top Dead Center (ATDC) on the Compression Stroke.
You would rotate the Engine in the direction of normal rotation to TDC on the Compression Stroke and continue to rotate past TDC to 15 degrees ATDC.

aaa's description is better of the two.

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84 300D, 82 Volvo 244Gl Diesel

Will I see something there that says TDC?

Hugh Sr
1984 190d (W201/601)

I forgot to add this to my last post. If that is the case that the blade will be in a lock position @ 15 degrees, why would you need the serrated wrench to turn the IP shaft? (that did cost $135).

Hugh Sr
1984 190d (W201/601)

You can turn the IP shaft in the drection of rotation with the Retaining Nut on the end (the IP does not have enough resistance to turning that it would cause over tightening of the nut) of the IP Camshaft or use an inexpensive Strap Wrench on the Splinded/Serrated Gear.

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84 300D, 82 Volvo 244Gl Diesel

Diesel911,

Will 15 degrees always be on the compression stroke?

Hugh Sr

1984 190d (W201/601)

All of the Engine Timing is based on the Compression Stroke of the #1 Cylinder.

In this case you come up on the Compression Stroke all the way to Top Dead Center (on my 300D this is Zero Degrees on the Crank Damper)and go 15 degrees past the Compression Stroke. At that point you are 15 degrees After Top Dead Center.

But, this is using the Injection Pump Locking Pin, AB Light or RIV Timing.

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84 300D, 82 Volvo 244Gl Diesel

O.K.

Zero is TDC. I was just looking at the numbers on the damper where the adjusting pin is. At zero the numbers run 40, 30, 20, 10 to the left of zero. If I start at zero and turn the shaft clockwise to 15 degrees, then I'm good to go, and the blade on the IP should be in the right position to insert the locking pin - right? Thanks for your assistance - I'm bleeding a lot of oil.

Hugh Sr

1984 190d (W201/601)

Due to Timing Chain Stretch your IP Locking Pin might not catch on that blade exactly at 15 degrees ATDC because the Timing Chain Stretch changes the timing slightly. The main thing is you want to see that Blade/Raised Area in the Plug hole close to center. This will tell you are in the right position to remove the IP.

It is more important that when the IP goes back in that the Timing is at 15 degree ATDC and the IP Locking Pin is locked in. Then when you insert the Fuel Injection Pump and tighten it down it will be timed.

My IP seeps also seeps a little at the front. Mine hans a Paper Gasket up there.

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84 300D, 82 Volvo 244Gl Diesel

Not always- Being a four cycle engine, only every other rotation of the crank is a compression stroke. The injection pump and cam turn at half the speed of the crank, so if you don't get the pin in the first time around, try spinning the crank around again.

I was referancing my answer to what I had said in a previous post where part of my post I had said you rotate the Engine in the direction of rotation to TDC (Zero degrees - TDC) on Compression Stroke; and continue to rotate in the direction of rotation to 15 degrees ATDC.

(I did not say this as it confuses the issue; that when you go to 15 degrees ATDC (after the compression stroke) you are actually into what would be the Power Stroke if the Engine was runing.)

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84 300D, 82 Volvo 244Gl Diesel