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lines on timing belt

posted by  MarkyMark on  Thu Oct 18 19:59 CST 2012
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last visit: Mon Dec 17 21:34 CST 2012
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88 740 gle wagon non turbo with m47,

I have the silver surfer apart and because of the timing belt breaking I had to line up the cam timing mark, the middle gear timing mark, and the crank gear timing marks manually.

I put the belt on with the belt lines lining up with the timeing marks on all three. I then turned the crankshaft bolt clockwise and the belt lines appear to have moved out of the timing marks ...but the timing marks still look good ( when cam is lined up at the gear and timing cover the crank is lined up as well with the notch in the gear and the line on the block.

Should I take the belt off again and realign ??? She isn't buttoned up yet and would hate to have to take apart after all closed up.

-Mark








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    lines on timing belt

    posted by  TONY H on  Fri Oct 19 09:00 CST 2012
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    last visit: Fri Oct 17 16:39 CST 2014
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    After the initial line up , the lines wont line up again with all three Prockets for many turns of the crank.
    Bring The crank around to TDC and check the Intermediate and Cam marks. If they are on, button it up.
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      lines on timing belt

      posted by  MarkyMark on  Fri Oct 19 13:42 CST 2012
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      last visit: Mon Dec 17 21:34 CST 2012
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      Thanks Tony and aleekat for all your help.... i needed to charge battery (another issue) but before closing things up I fired her up and she started......Boooya!

      Didn't want to have to undue all of that later if I didn't get it right.

      Any thing else I should make sure of before putting everyting back on?

      -Mark







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        lines on timing belt

        posted by  TONY H on  Fri Oct 19 13:59 CST 2012
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        last visit: Fri Oct 17 16:39 CST 2014
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        If the Fan belts are tired, get new ones. Drive the car and after you hit
        about 200 miles. Take the Rubber plug out of the Upper timing cover and
        loosen the Tensioner Nut so the tensioner can snug up the Newly Stretched
        Belt. Other than that.. nope, button it up.

        Write down the mileage, do another Belt change in about 40K miles since
        it's juicy under there. the belt doesn't like oil. In the mean time get
        comfortable with the job of pulling the Sprockets to get to the Seals.



        From: aws-ses@brickboard.com
        To: Hoffm_T@tdipower.com,
        Date: 10/19/2012 03:44 PM
        Subject: BRICKBOARD lines on timing belt







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          lines on timing belt 700 1988

          posted by  MarkyMark on  Fri Oct 19 16:00 CST 2012
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          last visit: Mon Dec 17 21:34 CST 2012
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          Tony and Udo.....thanks for the tensioner tip.....

          I already have the new belts for alternator and power steering pump and since ac does't work I'm leaving that one off.

          If car starts right up and accelerates revs smoothly will that ensure that after I button up the Silver Surfer that under load it will be fine? I've been reading so many threads that this happened or that happened......I just don't want to be taking all that stuff off again.

          Would being a tooth off on the belt sound noticeably wrong on start up etc.

          -Mark







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            lines on timing belt 700 1988

            posted by  Onkel Udo II on  Fri Oct 19 16:31 CST 2012
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            last visit: Fri Oct 24 08:50 CST 2014
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            Driving would be the proof... you would be down on power either on the top end or the bottom end.

            Button it up and drive it. If it off, take the next weekend to re-do it.








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            lines on timing belt 700 1988

            posted by  aleekat on  Fri Oct 19 16:29 CST 2012
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            last visit: Fri Oct 24 13:19 CST 2014
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            One tooth probably not noticeable. When it's running, look at your crank pulley that it doesn't look like it is turning out of round. Lots of folks miss the "numb" that the crank pulley rides in. As far as re-tensioning, most manuals run anywhere from 500miles to 1000. While you're there, chalk, marker, whiteout, something to mark a line across the crank pulley. If it ever starts to separate, you can see that right away.
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              lines on timing belt 700 1988

              posted by  MarkyMark on  Fri Oct 19 21:01 CST 2012
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              last visit: Mon Dec 17 21:34 CST 2012
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              Real bad news aleekat......I started the car to see if pulley was wobbly....u were right it was so I did the rope trick to loosen the crank bolt and reseat the crank pulley ....I snugged up the crank bolt but in my haste to get done tonight I turned the engine over.......ran real rough turned off immediately.

              the BAD news.......I left the rope in #1 cylinder.

              It got sucked right into the cyclinder head.

              I used dental picks to try and get out all the rope with out removing the head and thought I had it all or almost of it and thought the rest (lots of the rope was pulverized and shredded) would burn off in the cumbustion chamber.

              while moving the crank clockwise to loosen and compress and free up more rope it didn't feel any different so I popped the plug back in and started the engine again........weird noise .....valves are bent or screwed up for sure.

              Whats the next step? how much to fix approx.? am having oil leak issues at cam seal or head anyway might be good time to address that as well.


              any and all help would be appreciated.

              -Mark








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                lines on timing belt 700 1988

                posted by  aleekat on  Fri Oct 19 21:23 CST 2012
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                last visit: Fri Oct 24 13:19 CST 2014
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                Man, that sucks. Never heard of that happening. Maybe someone else can chime in. Personally, I would verify the timing marks again, and rotate the crank and kinda see by feel if you feel any resistance. If it is the valves, the good thing you wouldn't have to send it off to get machined. Hope someone else can give you some more advice. As far as the oil leak, may be just the valve cover gasket.
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                  lines on timing belt 700 1988

                  posted by  Onkel Udo II on  Sat Oct 20 05:09 CST 2012
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                  last visit: Fri Oct 24 08:50 CST 2014
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                  That really does suck but I have to admit I am surprised the car would even start with the rope in there.

                  I think you are pulling the head no matter what at this point, but it cannot hurt to re-check the timing. My suspicion is that you have a chunk of rope holding open a valve. As a result it will never burn off because you will never achieve combustion in that cylinder. Our valves are not Desmo so they are opened mechanically by the cam but closed by spring pressure.

                  Pulling the head is a long and tedious process with a ton of steps that have to be done in the right order. Please use a checklist. Also, attached a pre-start checklist to the disconnected negative battery terminal.

                  Good luck!








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                    lines on timing belt 700 1988

                    posted by  MarkyMark on  Sat Oct 20 14:12 CST 2012
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                    last visit: Mon Dec 17 21:34 CST 2012
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                    Onkel....I know the b230f is a non interference engine and if the timing belt breaks the cam will stop turning before crank but is it possible that the valves can't be bent even if rope got caught under them?

                    I really hate to have to tear the head off with all those old bolts not to mention the oil and grime and being outdoors.

                    might it be easier just to buy a complete engine from internet shipper and plop that in?


                    I cked out a u tube video on changing a 240 head gasket and there is a lot of work involved.








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              lines on timing belt 700 1988

              posted by  MarkyMark on  Fri Oct 19 17:12 CST 2012
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              last visit: Mon Dec 17 21:34 CST 2012
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              aleekat.....is the nub kind of like a metal key that would go in a lawnmower blade to keep it in place and orieented properly?

              I was a little surprised that wasn't real obvious how to put the pully back on like putting the crank gear back in...can only go on one way.

              -Mark








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                lines on timing belt 700 1988

                posted by  aleekat on  Fri Oct 19 20:48 CST 2012
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                last visit: Fri Oct 24 13:19 CST 2014
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                No key. Just a raised bump on the engine side. If you can slip the crank pulley on with no effort, then rotate it until you see it seat. If it's spinning true, you got it.
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    lines on timing belt

    posted by  aleekat on  Thu Oct 18 21:16 CST 2012
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    last visit: Fri Oct 24 13:19 CST 2014
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    Ignore the lines on the belt. The middle shaft doesn't matter if this is rear distributor. Normally get it all aligned, release the tensioner. Rotate clockwise 2 turns back to TDC and double check marks are still aligned.
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