Me again!!! Now I have a slight tapping and high idle!

[lanceh_09]

Hi folks really sorry to be drownding you in posts just really helpful replies have got me this far!

So the engine and gearbox are back in all pipes plugs leads hoses brackets are on! When I fired it up the flat cable that comes from the coil got really hot so firstly I'm looking at where I could give it a better earth.

The engine thankfully did fire up good but unfortunately the engine has now a slight tapping and the revs will idle at 1000 but with 20-30seconds will gradually rise to 2000-3000 which makes the tapping slightly louder.

So a breakdown of what I've done. Removed e +  Gb, then marked everything with White marker, removed gearbox to replace clutch but when I fully removed clutch I found it was virtually brand new so  just put back together an bolted back up! Then I replaced the cambelt after replacing damaged crankshaft again after fully marking everything. All the marks I made lined up good! So now I'm confuse to whats causing the tapping and high idle!

My first reaction was to now remove all covers of cambelt an properly re-aline the timing marks then fit belt again, but after 10 minutes looking on forums and the Internet I have now 1 millions remedies of what could be causing this from a faulty crank sensor (which I don't no what or where that is) to the cambelt, tappits, flywheel, leads, cap!

So, anyone know where to start and what is the common to check!? Just to let you know the engine has no coolant or water in what so ever as the radiator is still off invade I need to get back into the engine for the cambelt! So I've only been running for 2 minute intervals then cooling for 1hr! Some people have said that the auto choke is kicking in causing the high idle?

Thanks in advance

[Shizzle]

Hi what car/engine do you have.

[lanceh_09]

Corse sorry it's a mk2 1986 Golf gti 8v not sure what type all I can say is it's got the steel bolt on cam cover.

[Shizzle]

and this noise has only happened since you changed the cambelt?
nothing else been changed or modified.

[lanceh_09]

Ye only since the cambelt change and the crankshaft gear was replaced! I marked one tooth on each gear with white marker with identical marks on the engine to line up when i put the new belt on. I know its a cowboy way of replacing but i couldn see how it wouldnt work but maybe thats caused this? Not sure! The clutch and flywheel have also been off (at separate intervals)  marked up the same way!

[Shizzle]

i couldn't see the clutch and flywheel causing the noise are you able to do a compression check incase of bent valve also does the car drive with same power.

[lanceh_09]

Oh dear hope not! Hopefully you mean a simple compression test as in fitting spark plugs and trying to turn the engine by hand? If not I havnt all the gear to do anything critical! Side of house on drive job this has been! well I've only had the car 3 weeks and it's been stored in a workshop 13 years before I had it so I don't know how it drove to compare! Ive still to this day not drove it as I've only just put the engine back in! Im guessing I should start concentrating on getting the belt back off and line up properly?

[lanceh_09]

Quick update - not sure how but the tapping has actually cleated itself so weather the oil pressure built up enough to coat the tappits? Not sure but also the revs slowed down afyer 10 mins so again guessing here but could have been auto choke?? But ye no problems now!

[Shizzle]

Glad to hear its all sorted 

[clipperjay]

YOU NEED TO CHANGE THAT OIL FOR SOME GOOD STUFF!