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Old 12-05-2004, 15:31   #1 (permalink)
methanol injected clevo
 
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Who here has broken a Cleveland block?

Hi Guys,

Similar thread to the crankshaft one...

I know the blocks are more likely to fail than the crank... and i'm interested in knowing storys behind the failures

If you guys could mention

a) If it was a Early/Late model block
b) How was it prepped
c) How much HP/TQ was being created

This also, should prove interesting...

I've had a engine failure... not not block. (funnily enough the oil system let me down).
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Old 12-05-2004, 15:32   #2 (permalink)
methanol injected clevo
 
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Re: Who here has broken a Cleveland block?

actually no i lie, it was detonation
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Old 12-05-2004, 15:50   #3 (permalink)
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Re: Who here has broken a Cleveland block?

mite be abit off topic but ill add it in anyway
my old 351 clevo had strandard rods doin the burnout comp at easternats and snapped 2 rods stuffed up the crank, rods, bore and bistons not happy at all 10k dollar motor down the toilet
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Old 12-05-2004, 17:24   #4 (permalink)
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Re: Who here has broken a Cleveland block?

I've seen a quite few clevelands fail but not one single failure was caused by block issues.

1) failed due to really excessive overheating (160deg+)
2) Failed due to squirter from Holley falling in
3) Failed due to a multigroove valve failing
4) Failed due to the aircleaner thread falling in when running no aircleaner
5) Failed due to detonation
6) One on my garage floor at the moment failed due to detonation

All the motors apart from no 6 where generating around 175-220rwkw. No 6 I have no idea what sort of power it was generating when it was done but it did warrant a 650dp carb.

Brenden
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Old 12-05-2004, 17:26   #5 (permalink)
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Re: Who here has broken a Cleveland block?

thanks guys... this thread should prove interesting...
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Old 12-05-2004, 17:58   #6 (permalink)
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Re: Who here has broken a Cleveland block?

Never seen a broken Clevo block before, but have heard the stories.

The most common Clevo dramas I have seen are dropped valves, smashed pistons and twisted rods. Valve heads have a nasty habit of ****ing bores, rooting heads and anything else that they come into contact with.

Never physically seen a rod and piston hanging out the side of a Cleveland block though. Have seen it plenty of times on Hemi and Holden 6's....

Troy
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Old 12-05-2004, 18:56   #7 (permalink)
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Re: Who here has broken a Cleveland block?

cracked a block when trying to replace the heater hose pipe on the front of the block (you know the one that rusts away) it broke off in the vice grips, so we had to push it all down in there and hammer it with a screwdriver to break it up for the magnet, but somehow managed to crack it somewhere (still never looked to figure out where, but every time we filled the radiator number 1 was filling up, and obiously couldnt turn it over with the key due to hydraulic lock, so that put the poor old XD ute off the road, LOL
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Old 12-05-2004, 19:20   #8 (permalink)
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Re: Who here has broken a Cleveland block?

Had a standard XC 302 block fail due to a porous casting, would vent exhaust gas into the cooling system, heads replaced etc eventually fixed with an exchange short motor. engine had done 120,000 Km.
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Old 12-05-2004, 20:16   #9 (permalink)
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Re: Who here has broken a Cleveland block?

A mate has blown a groove like a blowt orch acress the deck from one ebnd to the other, but never actually broken a block in 10 years (except for damage from a snapped krypronite rod) It makes 795/695 or there abouts.
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Old 12-05-2004, 22:32   #10 (permalink)
Two SC 61's = trouble
 
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Re: Who here has broken a Cleveland block?

Had a few split bores...Latter blocks are better in this area...Fixed by sleeving..
Old style TRW forged pistons with plenty clearance doesn't help...
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