tbh looking at them results i am kinda hoping the compression tester wasn't tightened up enough on the dry test for cylinder 3 and that if i repeat it might be better.

What do the clever people of the cento section think here if we ignore cylinder 3, would you reckon the rings are ok if i retest dry and get 210+ on cylinder 3? I did feel the tester twist in my hand when i did that cylinder dry....

re test the third one, i sometimes use bit of Vaseline on the tester o-ring for perfect seal and do a double test each cylinder and then take an average to smooth out variables

aye hopefully get a free half hour tomorrow aft to do it again, will report back.

centoproject said:

i sometimes use bit of Vaseline on the tester

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ooo smut....

dry 235 250 170 210
wet 280 260 240 210

Click to expand...

It's a pretty complex (but real world) picture. Bores/rings on #1 look nackered. #4 has big time valve issues, or, just maybe, a breached HG with 3 which probably has very bad bores/rings.

Personally, I'd be inclined to look for another bottom end unless you wanted to keep a clunker going.

The compression is still pretty good. I would be incline to keep driving it as is .

Ming

Mmmm decisions decisions. Rebuild bottom end with my 16v pistons and turbo it or try find a cheap 16v engine or just rebuild it as a p75.

Still gonna repeat test today if i get a chance.

1.4 16v . You know it be the cheapest option!!!

Well apart from the P75 lol

P.S - I would just keep driving it and enjoy driving a cinq!!!

Ming

repeat test for confidence when you lift head.

may only need new rings for another 50k miles before rebuild Id not run engine until after strip just in case it is simple problem that might get worse

lift head use an old ring top and bottom of travel and depth gauge to keep square

id be gutted if it was mine sorry

Don't worry i will be doing test again before i do anything else, i just had half hour yesterday between stopping working and taking the mrs to work so thought i'd quickly do one. Weekend soon so if i don't get time today

centoproject said:

use bit of Vaseline on the tester o-ring

Click to expand...

Best used on the outside door knob - so the kids can't rush in unexpectedly from the garden

fostertom said:

Best used on the outside door knob - so the kids can't rush in unexpectedly from the garden

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And the award for the most random comment goes to ^^

aka joke - read back a bit

Right once again, done not in a rush and averaged over 3 readings. Looks alot better than before.


Thinking it might just be the crank sensor tbh - only have punto ones which aren't long enough atm. might have to raid the sei just to test.

blu73 said:

might have to raid the sei just to test.

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Don't even think about it. :nono::shakehead:

lol, it just means the sei will get a new one instead of the cinq

It lives, starts on the button again. And Mr Monster will be pleased to hear i managed to make a shorter punto one fit so seiT still runs too.

But now i need new accelerator cable as the threads were buggered and now can't tighten it back on

blu73 said:

It lives, starts on the button again. And Mr Monster will be pleased to hear i managed to make a shorter punto one fit so seiT still runs too.

Click to expand...

Spooky went to put some washer juice in the black Sei today and noticed my crank sensor looks like this:



Weird thing it is the engine mounts are solid and it's miles away from anything to rub on.

I guess it's probably been like that since I got it, all I've ever done to this car is put petrol in it and hose it down occasionally. Anyway best get it fixed before it leaves me stranded somewhere...

90% of breakdowns and intermittent issues on here seem crank sensor related. Thing is if the crank sensor is wonky the ecu thinks the engine is running at a different or irratic speed (if at all). Then all of a sudden none of the readings it's getting make sense anymore. It then trys to over-compensate, or run settings for the speed it thinks it's going. If it's getting an inconsisitent reading the result will be a complete mess. Quite likely it will start sparking/injecting fuel in completely the wrong positions. The crank sensor really is the achilles heel of these engines. In fact I think it's also the only sensor your engine won't run with disconected.

Anyway I'm glad you didn't pinch anything from the Sei, it's a slippery slope when you start doing this...

flocked dash surround thingy, because race car

They likes a good flocking..............