Clio Adey's Clio 172 Turbo (project 250bhp per tonne)

[Adey]

Will get it off the car and see what the score is. Possibly today. Over the last couple of days whilst I've been working, my scenic shifter turned up and my brand new gaz coilovers..... which sucks.

 

[DaveL485]

Will get it off the car and see what the score is. Possibly today. Over the last couple of days whilst I've been working, my scenic shifter turned up and my brand new gaz coilovers..... which sucks.

Vulture mode on - as discussed, engine mounts, dogbone and that shifter shove in my direction pleasethanksloveyou.

Vulture mode off - If the rod exited the block and the engine was shut down quick, then the turbo should be fine. The piston effectively stops debris getting out a valve port and into the turbo and a fast shutdown means the oil circuit would remain intact enough to have not caused issues in the turbo. I would assume the turbo is fine for re-use (but be prepared for bad news) IYSWIM.

Honestly if it were me, I would assess carefully what I could sell and for what money, against what I could sell the fixed car for, allowing for the time and effort involved in each too. What does a good 172 engine go for now?

Do we know why it failed? Is it a case of too much torque, or was there a problem? Again that would drive my decision to fix or break cos I wouldnt want to fix it for it to go again if the cause of the failure is still there.

 

[Adey]

After some emails with scoff he thinks the earlier in the day fuel leak could of caused a lean situation starting off a bend in the rod or something else internal. I drive very steady most of the time so left work at 10pm cruising at 60 for the mpgzzzz then came to a car I needed to overtake about 8 miles after leaving. Pressed the go pedal passed the car and as I let off boom! In to neutral instantly and off the road.

As for today's inspection the piston looks to be in the bore and nothing has exited in out the inlet or exhaust. Can see all the valves in place and intact so I think that's my only saving grace. My brand new (less than 3k old) ball bearing turbo looks new still.
Turbo kit minus the downpipe has been removed from the car.

Even with a new engine the no service and silly amount of owners means it will never be worth much tbh. I'd be better off buying a low miler low owner car and fitting to that if I wanted to keep the value up.

Anyway I'm a little happier though I did have to beat the rod out the block, something went through a water pipe so lucky for me the engine was pretty drained of most of its fluids before being dumped on the grass. Time to have a think of the route I should take.

 

[Mart]

After some emails with scoff he thinks the earlier in the day fuel leak could of caused a lean situation starting off a bend in the rod or something else internal.

Yep, as I mentioned to you on Friday, that would be my hunch too. Any signs of det' on the piston/valve/squish area?

 

[Adey]

Not going to bother removing the head tbh. Too much work for no gain.

 

[Mart]

Furry muff.

Good bit of heat discolouration on that rod - Was the oil pressure ok?

 

[Adey]

seemed it, not something i keep an eye on. no rattles no noises and the light went out in an instant.

 

[Adey]

Stripping it now. Will be in touch with the bits you want dave. Will start a fresh with another car or the twingo. Spend some time on the dauphine maybe.

 

[jamesc]

FFS missed this over the weekend. Sorry to hear mate

 

[Adey]

And now the shell is gone. Possibly destined for the track a mate came and picked it up today. Now I have ticked the n/a tuned supercharged and turbo charged clio boxes

 

[RTS Motorsport]

Rodbolts have failed causing the failure

 

[andybond]

Not normally on these. It's normally the rod actually failing that causes the bend due to casting imperfections.

 

[RTS Motorsport]

Ive seen this on Evo's. May or may not be related, but it was the rodbolt stretching which resulted in the failures. On the extension strokes

 

[andybond]

I have extensive experience of it on the Meganes. uprated bolts are only really needed in the high revving application. As Adey was pootling around it would be a failure in the rod casting that caused it.

Like the megs with the very similar rods ..

 

[RTS Motorsport]

Poor that Andy.

Do they go in stock form?

 

[andybond]

Poor that Andy.

Do they go in stock form?

No , they tend to be fine in the 172.
In the megs they bend when tweaking ..

 

[RTS Motorsport]

No good!!

 

[Adey]

Think it's an age thing. I'm seeing and know of a few stock 172s that have thrown them recently on good running engines. The old ones are reaching 16 years old now.

 

[RTS Motorsport]

An engine will run forever if treated with respect and regular maintenance. Thrashing from cold and missing services is a recipe for disaster

 

[andybond]

Think it's an age thing. I'm seeing and know of a few stock 172s that have thrown them recently on good running engines. The old ones are reaching 16 years old now.

Not sure it is Adey.

The meg rods tended to bend a lot earlier. I think some are just poorly cast.