"JOAN" Continued

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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Thu Mar 06, 2014 8:28 pm

So the knocking DOES remain ! and also the engine has more lumps than a bowl of poridge . So im now thinking gearbox mounts . If they have faild would that sound and feeling transfer down the driveshaft and axel makeing me think it was coming from the back ? and a very kind man from the noggin has offerd to help me cheak to see if my tappetts have been overtightend and cheak compression and vacume .



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Re: "JOAN" Continued

Post by Scimher » Fri Mar 07, 2014 4:28 am

....I know that when my old gearbox mount was the consistency of liquorice, that the propshaft seemed to threaten to burst through the transmission tunnel if letting the clutch out on an upward slope/hill......(it seemed to clatter against it..)



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Re: "JOAN" Continued

Post by philhoward » Fri Mar 07, 2014 7:18 am

If the gearbox mount has failed (and they do), then you can get all sorts of issues, depending on how bad it is. Worst case is the gearbox is resting directly on metal and/or the prop might even be catching on the chassis under extreme movement (as Scimher says).

It's one of those things that you don't know how bad it is until you fit a new one. If there is a thick metal spacer or two under the mounting (I think there should be at least one?), make sure they go back in otherwise the angle of dangle will be wrong.


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Re: "JOAN" Continued

Post by Roger Pennington » Fri Mar 07, 2014 11:58 am

Yes, when you get the old mount off the car, it will probably look more like the one on the right, than the one on the left! :shock:
Gbox-Mount2.jpg
Gbox-Mount2.jpg (158.68 KiB) Viewed 1395 times
It's not a difficult job to change, just messy!


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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Mon Mar 10, 2014 9:51 pm

Wow , ok i,ll get one on order , but for now i still seem to have a realy lumpy engine. I just can't get it to run smoothly !
So far i've : Cheaked valve clearence's
Fitted new carb (pre jetted )
Cheaked spark plugs
Compresion test (all seems o.k 8-9 for all )
Carb vacume o.k
Timing reset.
Adjusted mixtures.
The car is ok on acceloration but once cruising at say 40mph its just sort of jerky and on tickover its jumping all over the engine bay, Could the timing gear still be in the wrong place ?Any suggestions welcom at this stage .



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Re: "JOAN" Continued

Post by Oaksey » Mon Mar 10, 2014 10:04 pm

If it was running nicely before fitting the new carb, that's probably where to start (could be an air leak if it accelerates well but won't idle or cruise - mine had the same symptoms with that problem)


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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Mon Mar 10, 2014 10:11 pm

It wasn't realy running good before , that was one of the reason for fitting the new carb. Won't start now either ! LOOSIN IT :x



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Re: "JOAN" Continued

Post by Oaksey » Mon Mar 10, 2014 10:13 pm

Ok, reworded - after fitting the new carb, did the symptoms stay the same or did they change?


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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Mon Mar 10, 2014 10:17 pm

Stayed the same , Where was your air leak and can the breather pipe from the rocker cover to the carb be changed for a different piece of pipe' like fuel pipe so long as the valve piece is still fitted of coarse ?



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Re: "JOAN" Continued

Post by Oaksey » Mon Mar 10, 2014 10:20 pm

Then it probably isn't the carb unless both were/are badly setup l which is doubtful.

My air leak was around the carb spacer block. It meant the engine ran like crap excpet for when accelerating, when it ran incredibly


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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Mon Mar 10, 2014 10:30 pm

changed it , got a good one from lukey boy . Pipe could be suspect though. It had a small crack in it and i had to dremel some of the old origonal carb spacer out of it. The crack is just where it goes onto the spacer but i dont think it could suck air in as it should becoverd by the jubilee clip and where its pushed onto the spacer.



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Re: "JOAN" Continued

Post by Scimher » Mon Mar 10, 2014 10:40 pm

Try a search of the forum.....There was a comparatively recent thread where, I think, an SE6a had similar problems & Tony Idle gave a pretty in-depth analysis.......



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Re: "JOAN" Continued

Post by BRABUSMADSCIMGTE » Wed Mar 19, 2014 9:30 pm

So ' while refitting the timing case and fuel pump i noticed that there was no fuel in the lines , so i did some manual pumping and found that the fuel was being pumped no further than the pump its self , thus not makeing it to the carb and upon closer inspection found it to be well worn. Pump changed and while its not eager to start obviously drawing fuel up ' it will run for about 10 seconds then cut out and not restart !!
Before the inline fuel filter was never compleatly full but now it is . Could the engine now be getting to much and flooding itself ?



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Re: "JOAN" Continued

Post by windy » Wed Mar 19, 2014 9:44 pm

It might be removing/refitting the fuel lines to the new pump has caused a small piece of debris to become lodged in the float valve. I had this happen once & it looked like a tiny sliver of rubber fuel pipe had made it through a damaged carb inlet filter into the float valve, causing it not to shut off properly



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Re: "JOAN" Continued

Post by scimjim » Wed Mar 19, 2014 9:46 pm

the pump has to fill the carb float bowl - it can't flood the engine unless the carb is faulty (not stopping the fuel when it's full) - do you have a return line or is it input only?


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