clio 172 goes bang

[Brad grainger]

hi guys. last week I was testing my car on private land, I was in 3rd gear just touched the limiter about to change into 4th and bang the engine made a loud noise and cut out with the stop sign flashing. I dipped the clutch straight away and glided to a halt.

Today I started my inspection, the crank will manually turn over fine with no valves hitting piston noises although it turns over very freely. i took the engine breather plate off and noticed that a hydraulic lifter on the exhuast side has come off and is loose in the head. I've purchased the cam locking tool for further inspection but does anyone know why/how this happened? and wether there could be any further damage to the exhuast valves etc.

also I'm thinking of doing the 197 camshaft conversion. what's people's opinions on them?

Thanks in advance

Brad

 

[imprezaworks]

Timing belt okay?

 

[Mr R.]

Have you taking the spark plugs out?

 

[Brad grainger]

yes timing and aux okay. replaced by previous owner. that's the first thing I checked! timing belt nice and tight so tensioner hasn't gone or anything like that. I was thinking maybe jumped a tooth but the ends of the cams both lay horizontal @ TDC

 

[Brad grainger]

checked the plugs. nothing wrong with them and all the same colour. looked down the barrells at pistons' all look ok with no detonation to the faces. checked the oil dipstick for shards of metal but nothing.

 

[bloke]

sounds like it's dropped the head off a valve.

 

[JamesBryan]

I’d agree with it being a valve.

Fairly common on these.

 

[JB21]

Can't help on your issue but have recently had 197 cams fitted to an otherwise standard engine with filter and exhaust and it made 195hp and 171lb. Great cheap mod IMO.

 

[Brad grainger]

Can't help on your issue but have recently had 197 cams fitted to an otherwise standard engine with filter and exhaust and it made 195hp and 171lb. Great cheap mod IMO.

what's the crack with the timing of the 197 cams?

 

[JB21]

what's the crack with the timing of the 197 cams?

Dunno @bloke fitted and timed mine.

 

[JamesBryan]

@bloke is the only one that I know of that has timed the 197 cams to make 195-200bhp range.

 

[Brad grainger]

Can't help on your issue but have recently had 197 cams fitted to an otherwise standard engine with filter and exhaust and it made 195hp and 171lb. Great cheap mod IMO.

did you have a graph for this mate? be nice too see

 

[JB21]

did you have a graph for this mate? be nice too see

 

[JB21]

Sounds good as well, definitely different over OE cams...

 

[imprezaworks]

Lol at the race driver in the 306

 

[JB21]

Lol at the race driver in the 306

Full of dickheads that day mate.

 

[Brad grainger]

Sounds good as well, definitely different over OE cams...

sounds decent mate!

 

[mannybadyal]

Can't help on your issue but have recently had 197 cams fitted to an otherwise standard engine with filter and exhaust and it made 195hp and 171lb. Great cheap mod IMO.

Hi were did you get these done and what is the cost? thanks

 

[imprezaworks]

Carl did it. In safe hands mate.

@bloke

 

[Mr Plums]

How much all in with mapping @bloke?

 

[jiminy]

View attachment 1351185

Would be great to see a before as well, what do 172's make on his rolling road as standard.

 

[JB21]

Would be great to see a before as well, what do 172's make on his rolling road as standard.

No before as the aux belt snapped taking the cambelt with it before I could get a run.

 

[bloke]

Would be great to see a before as well, what do 172's make on his rolling road as standard.

anything from just over 162/3bhp.

 

[Brad grainger]

8 bent exhuast valves