View Full Version : tapping from top of engine
dingo22033774
20-06-2009, 12:49
hi there the engine was rebuilt about 3 months ago all new big ends mains crank reground new pistons liners rings timing chain tensioner oil pump head gasket and bolts. the carb has had a rebiuld. and the head was skimmed. the prob is that since the rebuild there has been a tapping noise coming from the engine. ive taken the sump off to check all the main and big end shells and no play there. tried taking the rocker cover off and checking the tappets and adjusting and chaged the push rods put it all back and its still tapping. the only time it goes away is when i rev it at 4-5k then after 5-10 second the noise comes back. any help cause its a pain in the arse
hi there the engine was rebuilt about 3 months ago all new big ends mains crank reground new pistons liners rings timing chain tensioner oil pump head gasket and bolts. the carb has had a rebiuld. and the head was skimmed. the prob is that since the rebuild there has been a tapping noise coming from the engine. ive taken the sump off to check all the main and big end shells and no play there. tried taking the rocker cover off and checking the tappets and adjusting and chaged the push rods put it all back and its still tapping. the only time it goes away is when i rev it at 4-5k then after 5-10 second the noise comes back. any help cause its a pain in the arse
possible manifold gasket blow. is the clutch release bearing slightly noisey
dingo22033774
20-06-2009, 13:34
nothing blowing out by the manifold gasket just tryed felling it with my hand very technical i know:). how would i check a clutch release bearing
sit with the engine running, listern for the noise, when u hear it press the clutch down and see if it goes away
also did you meausre the head before you had it re-skimmed?
dingo22033774
20-06-2009, 17:52
will have to try tommorrow wit the clutch. no didnt measure the head. whats that 4 to c if its been skimmed to much?????
dingo22033774
22-06-2009, 18:51
didny get a chance to check the size of the head forgot me gauge. theres nothing blowing exhaust and inlet wise but i could hear a hissing coming from the back of the carb couldnt pinpoint where. also the car has started running a bit ****ty and lost a bit of power. im really stuffed now i aint a mechanic and dont know any that dont talk **** to ya. does any1 know if there any garages local to me that will sort it. chatham in kent:cry:
FurioKid
22-06-2009, 19:09
If theres a hissing from the carb and its running crap first thing i'd check is that the mixture screw hasn't wound itself out? Its located on the left hand side (as you look at it) of the carb, may possibly be a white cap covering it.
hope that helps a little
dingo22033774
29-06-2009, 18:50
spot on m8 lovely running sweet. as for head size it is 74mm
dingo22033774
29-06-2009, 22:10
right got the hump so i took the head off and still couldnt c nothing loose or worn. nothin doin on the camshaft followers either. heres some pics see if any1 can c sank wrong:scratch: cheers paul
"any1 can c sank" :confused: I know I'm getting on a bit, but come on!! What happened to english ? :sad:
dingo22033774
29-06-2009, 22:41
ff
dingo22033774
29-06-2009, 23:02
ff
ff
dingo22033774
29-06-2009, 23:04
"any1 can c sank" :confused: I know I'm getting on a bit, but come on!! What happened to english ? :sad:
its what we learnt in school text language ;)
dingo22033774
30-06-2009, 19:52
is there a way of checking if the camshaft is loose in the block.
dingo22033774
15-07-2009, 20:51
just fitted new gasket n bolts and manifold gasket but got it going and i still got this noise http://www.youtube.com/watch?v=HBlvc1iI1rU. any 1 know what it is richie has already suggeted piston slap:cry:.
scratcher
15-07-2009, 22:16
Sounds quite like mine but a bit worse. I've had the piston slap diagnosis.
dingo22033774
15-07-2009, 22:43
Sounds quite like mine but a bit worse. I've had the piston slap diagnosis.
im in tears cause its pritty much a new rebuild 1000miles ago. and not impressed with the price of piston sets:cry:.
its doesnt sound too good but ive heard worse engines (my mates rs escort when he lost big end shells)
im very very new to the 5 world but im in herne bay in kent if i could offer any help i would but im useless lol. failing that if you get fed up with it and want to get rid of it drop me a pm since a friend of mine is looking for a 5 project and we can easily get it picked up.
dingo22033774
16-07-2009, 19:52
its doesnt sound too good but ive heard worse engines (my mates rs escort when he lost big end shells)
im very very new to the 5 world but im in herne bay in kent if i could offer any help i would but im useless lol. failing that if you get fed up with it and want to get rid of it drop me a pm since a friend of mine is looking for a 5 project and we can easily get it picked up.
i dont think i could ever sell it its like my second child lol.
THE MASTER
16-07-2009, 23:47
try running the engine and pulling off a plug lead one by one see if you can make the noise change .
i think it might be piston grab
pulling off a plug lead might help with identifing wich cyl it is
;)
scratcher
17-07-2009, 07:01
im in tears cause its pritty much a new rebuild 1000miles ago. and not impressed with the price of piston sets:cry:.
You could get away with just changing the cylinder at fault and save some cash.
Do what The Master said to help you find which one(s) gone.
dingo22033774
17-07-2009, 18:54
ive done this already and as it goes it still knocks on all cylinders dont matter what plugs off. the only thing with this is that every time i take a lead off its gives me an electric shock lol fun times
ive done this already and as it goes it still knocks on all cylinders dont matter what plugs off. the only thing with this is that every time i take a lead off its gives me an electric shock lol fun times
i think you have piston slap to be fair mate you should have checked them when you had the head off also bearings i know you said to me you cecked the big ends what condition are the mains in
dingo22033774
17-07-2009, 20:21
i think you have piston slap to be fair mate you should have checked them when you had the head off also bearings i know you said to me you cecked the big ends what condition are the mains in
i know the only thing i done was see if it was loose in ther liner. as for the mains ill have them all of tommorrow and check them. and i think ill just have to stick one of the old liner + piston wit new rings in for the minute till i save up for another bottom end build.
i know the only thing i done was see if it was loose in ther liner. as for the mains ill have them all of tommorrow and check them. and i think ill just have to stick one of the old liner + piston wit new rings in for the minute till i save up for another bottom end build.
be sure to check all pistons not just the one
Jimmy_GTT
24-07-2009, 14:34
New poster! (less than 10 posts)
I have had the same noise when we rebuilded my engine with a complete set of pistons, linears, rings from Reichard Motorsport. Than I have sent the whole set back and they have chenged it. The clearances between the linears ant the pistons were about 0.1mm. But unfortunately we haven't measured it before building it into the engine.
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