ok i'll try it tomorrow, bit late to do it now, or i'll fuck all the neighbours off.

What would it prove though? that it was just a false reading? and that its still number 4 that is the issue and non of the other.

I did do number 1 twice as it was suprisingly high, but both result came out the same, infact the second attempt was slightly higher, i presume due to heat.

I did, 4,1,2,3, 1,2,3,4. All reading were pretty much the same as the first

 

Ah, fair enough then, I was just worried that number 1 was low down the bore when you took the cams out, and hadnt had enough time turning over to give a correct result, but if you went back afterwards and did it again, that rules that out anyway.

Do you have a compressor and not a leak down tester, or not even a compressor?

If you have a compressor, then drill a hole in a spark plug, and pump compressed air in using it as an apdaptor, and listen for where it comes out.

 

ahh ok chip, yeah did it twice as i was dubious myself.

no compressor or leak down tester.

 

Hope its nothing major mate

 

its deffo nothing major (i class bottom end as major) think its either a chip or bent valve personally.

Nothing that cant be fixed pretty cheaply i hope

 

Quick question

Why didn't u just start the engine, get in the car, let it warm up and then take it off the limiter everywhere.

I think u have managed to worry yourself about nothing. If I am reading this correctly, your car has sat still for a while, and u didn't start it, u tested everything first. I would have just turned the key, warmed it up over a good few miles and then limitered it everywhere.



RW

 

Ironically its possible if its been stood a long time, its some corrosion on the valves/seats that would sort it out if you did it stevens way

 

reason is steve, it had a bit of a make-over the winter new inlet, new rocker with cam trigger, new rail, -6 fuel lines, grp A breather, new ecu, coilpack, strut brace, new hoses, wheels, ap's etc etc

so it was basically in the process of all going back together.

i havent finished the fuel lines or mounted the coilpack hence why the car hasnt been started to do a hot compression test.

 

Nothing in the "core" engine has been touched, ie no cams out, timing changed etc??

Put it back together and drive it, as has been said by other people, if the engine has not run and is cold it can give all sorts of odd readings ... Give it a good drive then check it again, things don't just break on thier own

 

Ryan,

What has led to you the point of wanting to do the compression test?

Was it just for your own piece of mind or was there a problem prior to the car coming off the road?

Ian

 

just peice of mind ian.

car ran fine other than a slightly missfire on boost, which i put down to plugs and /or loom as they were PP8's

 

Ryan, do you want to borrow a compressor

 

no mate its cool for the hassle of borrow and compressor etc its just as easier to whip the head off.

 

You have NO excuse for a dodgy loom seeing as you make them

 

PP8s and Stage 3, i would also put down to plugs.

Nothing above stage 1 for PP8

Glad you took them out Ryan

 

yeah me too mate before they melted it.

Rich, i've only put my loom on over the winter rebuid the car was running a standard loom before it came off the road, but im sure you already knew that, and just being a sarky tit

 

Yes im being sarky mate

Still reckon give it a drive for a few miles and see how it behaves

 

yeah but at this stage it would cost me Ł80 to do a headgasket and inspect it, should i drive it a few miles and have to take the head off it cost me a fair few quid more with more new gasket etc etc, rather than running the risk of them leaking.

The engine was built about 8yrs ago, but only done about 5k miles since its been built, so its been stood alot of its time.

 

well its deffo done damage.

Swapped the tappets from Number 4 with Number 1.

Number 4 still has 7 Bar of compression, but No 1 now has like 2 BAR, so the tappets are obviously seized open or something holding the valve open causing no compression, which means number 4 valves are pretty much certainly bent i would imagine

So head will be coming off tommorrow or over the weekend.

 

right:

HEAD IS OFF.


















and



cant see anything wrong, valves seem to be seating ok, and only tiniest of tiny marks on pistons 1 & 4, so im guessing it was the tappets all along, holding the valves open. (then spring compression after a while sealing them again)

very very odd.

Bottom end is perfect no wear lip and still has all the hone markings on the bores.

So anyone seen this before? i presume is a case of the tappets locking fully open.

Going to take the head to tremona garage tomorrow for them to give it a once over before i install it.

 

...great news Ryan..stick a new set of followers in and your be fine by the looks

 

yeah thats what im thinking.

just a pain in the arse, but its peice of mind now the head has been off and seen that the bottom end is still perfect, and the head "appears" to be the same.

 

Good news mate