Acceleration 3rd & 4th

I noticed when i first drove the van, it was reluctant to pull in third and would not do anything in fourth, now, i know there was "chuffing" and "blowing" out from the heads 1 & 2" (these are the terms the mech used) so he told me he had to removed the engine, tighten the bolts on the head and did the tappets the same time, now the engine sounds excellent, proper vw sound, but.. when I drove it home (20 miles) third was sweet enough, but it is still a little shy to accelerate (or pull) in fourth it seems like the accelerator needs to "catch" before I can give it any revs to increase the speed, could the accel cable need some kind of adjustment or tweeking? but like I say first second, is normal, third, I have got to rev high before releasing the clutch, and fourth? well fourth seems a litle its to shy to come out and play bat and ball,
please don't reply with expert advise about stripping anything down and less its quite visible and ease of use, I would prefer a straight forward answer to the fault which I can relay to the mechanic.
Thank you

 

It doesn't pull well from low revs in 3rd and 4th

There you go if not interested in what it is but you want something to tell the mechanic to sort

 

Could be many, many things, which your mechanic needs to sort out, if he's up to the job.

I don't like the sound of "chuffing", which implies to me that the head(s) aren't bolted down properly. They're unlikely to come loose unless the engine's been overheated, in which case one or more head studs may have pulled from the case. If your mech doesn't know how to fault find and fix stuff like this, I'd find another one.

 

I can drive it no probs, was doing 55 today when for a half hour run, @snotty the chuffing I described is what the mech said, he did take the engine out tightn the bolts and all this has stopped, the engine sounds fine, what i'm finding is this, the bus doesn't like 3rd and 4th with low revs, example, I will accel to 25-30 in 3rd, hardly a problem, change to 4th and then re accel put it seems like it wont, I push the pedal down but its not giving the revs instantly, it climbs to the revs and speed very very slowly, It will then run to 55-60 no probs, its like there is no revs when changing to fourth,

 

@poptop2 it'll drive anywhere at the mo m8

 

Try going a bit higher on the revs before changing up, changing/maintaining,increasing speed is a learned art ,also is there much play in your/the throttle system/linkage?is your change up style "tight"?

 

I know for a fact theres no oil breather hose, and if I recall the AA guy (whom when arrived last week pointed out the battery wasn't connected because when removing the jump leads, my m8 accidently hit it off without noticing) blocked off a little outlet pipe half way down the carb

 

Fourth gear in 30 is pushing it a bit low. Might why it started chuffing in the first place.

I know it sounds worse but higher revs up to red line are better than too low.
My acceleration goes

First gear 15 change up
Second 25 to 30 change up
Third 45 to 50 change up

It will pull gradually from 30 in 4th on a flat road but to accelerate change down ..

 

thought of the high revs but don't want to put to much pressure on the engine @ this point, as for changing up tight? not quite sure what you mean

 

@mikedjames that's a really useful piece of info what I was going to ask at a later date
thank you so much

 

i'll repost the pic of the reposted pic you posted and describe the in/outlet on the carb, give me a min

 

@poptop2


have way down centre of carb the AA guy blocked that little hole in the centre, there is no oil breather hose, and the oil filler cap is now missing

 

hang on

 

before the welding on the left, this is basically now (before AA guy capped the carb) without oil cap and breather hose