C1J Engine Problem

Need advice from the RTOC with ref to a friends C1J engine GTT that has broken down tonight.

The symptons are as follows, the little R5 GTT sounds like it running is on three cylinders but on 1 of the engine strokes whilst it is running @ idle there is a clonk that causes the engine to vibrate ?(Quiet alot) The clonk sounds like it is coming from the bottom end. There is no loss of coolant and no mayo and all 4 sparks have good spark and are in the correct firing order 1342 the fault developed whilst the car was being driven there is also no leaks under the car. Any ideas?:sos:

was it being driven hard ? melted or holed piston maybe ? he needs to do a compression test ;)

sounds like hes dropped a bearing, did the problem develop after giving it a good blat.?

Will do the compression test and go from there.

bent pushrod?

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Originally Posted by markey b

bent pushrod?

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:agree:

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Originally Posted by Scoff

:agree:

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I did think bent push rod but it's not the same sound as when a push rod bends will check it still though.

Cheers for the advice though

if its not the pushrod, then take the plug out and start the car. if the clunk goes away, then suspect the big end bearing.

Turned out to be a snapped push rod and a bent push rod

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Originally Posted by James5

Turned out to be a snapped push rod and a bent push rod

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Ouch! Was that abit of over revving then mate

Was it Fido's 5 James??

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Originally Posted by James5

Turned out to be a snapped push rod and a bent push rod

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jeezuz:eek: ive never heard of anyone snapping a pushrod before! must have been really rapeing the car.!

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Originally Posted by Ricardo

Was it Fido's 5 James??

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:agree: yep it was Chris's car, I believe he has ordered some new pushrods so car will be back up and running very soon. I have no idea what revs he was doing as I wasn't their he managed to get the car to mine where the RAC came and collected

Snapped a rod, blimey, i've bent a few, never snapped one though, WTF was he doing J ?

Thanks for all the help chaps. Could,nt belive it my self when i saw the rod.
Should be back on the road in a week :cooter:.
werent giving it any beans as the boost pipes had come off so drove it gentle to james house :)

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Originally Posted by fidos got a raider

Thanks for all the help chaps. Could,nt belive it my self when i saw the rod.
Should be back on the road in a week :cooter:.
werent giving it any beans as the boost pipes had come off so drove it gentle to james house :)

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We want piccies !!

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Originally Posted by 5teve L

We want piccies !!

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Dave H has the rods so he will get some pics up soon mate

While your at fitting them check your valve stems havnt fell apart if you run them and springs+rockers all ok.

Thanks rob ill have a check befor fitting the new rods and starting it up againg

Maybe if you were on boost & the pipe came off, the sudden loss of power slowed the engine to fast & bent the rods , is that possible guys ???

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Originally Posted by 5teve L

Maybe if you were on boost & the pipe came off, the sudden loss of power slowed the engine to fast & bent the rods , is that possible guys ???

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steve is it past your bed time ;) only kidding mate... i dout that would happen imo...

Yeah come to bed steve im waiting for you :laugh::laugh:.
here's a pic of chris's push rods
http://i515.photobucket.com/albums/t...bo/rrrr033.jpg

wow ,did he not have a rev limiter ??

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Originally Posted by Rob@Backyardracing

steve is it past your bed time ;) only kidding mate... i dout that would happen imo...

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It's been a while since i tinkered with a GTT, let alone drove one :cry::cry::cry: