Engine noise

[mark]

Mine did the same a few weeks back just after i got it on the road, it was almost a knock rather than a tap, i was using 20/40 oil

I put some engine flush in got it very hot drained it, new oil and filter with 10/40 semi synthetic and it purrs perfectly now

i played with cvhs alot a few years back when i 1st passed my test and they do seem to do this when they have been stood a long time, sometimes some flush and fresh oil and a run out sorts it, sometimes it dont. Some people say if its goona be stood a while to take the tappets out and store them in a bath of oil.

If you do need to change the tappets and want to do the stem seals whilst its in bits i have a tool to do the seals without taking the head off, giz a shout and you can borrow it if you like, i may even give you a hand!

[twinturbo]

The hot bath of oil trick can help revive a tappet. They can quite often get blocked by solidifed crud.

TT

[HandyAndy]

A little update........

I,ve spent the morning working on the car,

Solved the high tickover .......... I had not tightened a bolt that I,ve put into the manifold that originally had a pipe connected to the "frying Pan air filter" or the one going to the Brake servo ( which is no longer there ), so was losing manifold pressure, sorted

Re jigged my throttle cable ( Thanks Spud ), all smooth & free running

I took the rocker cover off whilst the engine was stone cold, I noticed that a couple of the rocker arms were a little on what I thought were loose, checked the bolts, all tight, didn,t go any further,
Ran the engine up to temp, the tapping noise is still there, it seems to come & go to be honest,
I,ll be changing the oil & filter tomorrow so will see if that helps

cheers Spud & Mark...........might be a case I need you both to come & have a look & listen, see what you think ........please

cheers
andy

[mark]

I may get a chance to pop over for a listen tommorow if i ask the wife!

Wouldnt normally need permission but we have a new baby now n all that!

[twinturbo]

Take the little one with you.

TT

[mark]

Originally Posted by twinturbo

Take the little one with you.

TT

I havnt had chance to weld the isofix childseat mounts to the back of my roll bar yet

[spud69]

Strap him (or should i say child seat), you can have a 3 seater and all go out......

Are you up for track time tomorrow night Mark?

Sure you've put in lots of good behavior....

AndyH

[HandyAndy]

Originally Posted by mark

I may get a chance to pop over for a listen tommorow if i ask the wife!

Wouldnt normally need permission but we have a new baby now n all that!

Ahhhh the joys of being a new parent

cheers Mark, send me a text to let me know if you CAN make it & if so what time approx.

cheers
andy

[Big Vern]

Hi Andy,

The followers are a little on the loose side in fact quite loose especially if rocked side to side. The hydraulic tappet pumps up with oil pressure so they should stay quiet when running but if they get crud inside then they either don't stay pumped up during the valve closed phase (lazy tappet) or they stay deflated (collapsed tappet) during valve lift, often accompanied buy a partial misfire. When collapsed the noise sounds deeper like a big end but faster if you get what I mean.
A lazy tappet might be revived but a collapsed tappet should be replaced imediately as it could spit out the follower causing a lot more damage.

For Info the engine oil supplied by Ford for engine testing and development when these were 'new' was Motorcraft 15w40.
Now they use 0w20 how times have changed.....

As for the Pierberg carb, the problems are with the choke system. Bin the choke flap and the module that operates it unless your using the roadster in the middle of winter.


BV.

[baz-r]

andy you had the hyd tappets out? im pritty sure you can fit them in the wrong way on a 1.8 cvh so the oil fill hole doesent line up.
you did put them all back in the holes thay came from? or did thay get mixed up

shouldnt take to long to whip of the rocker cover remove all the rocker arms and take out the tappets for a looky check the rollers on the bottom, oil holes, look down the tappet tubes to see if the cam is worn etc. even a oil wash out in the pariffin bath sometimes clears the sludge out and revives them.
failing that new tappets it is

too thick oil is just no good for hyd tappet engines as thay require a bit of leak by to lubricate and ajust corectly back in the early 90's i used to get engines running the cheap 20/50 5haging the cam lobes as the tappets failed to ajust going too tight and braking the hard skin on the cam all from the cost of a few quid on some oil
10/40 should be ok any lower could be a little thin for an engine of the cvh design era as thinner oils came later