stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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My mate was building a VERY high specd Civic VTi. It was going to be a high compression B20B3 engined EG Civic. High comp pistons, knife edge crank, stage 3 race cams, bike carbs, block guard, shorter ratio LSD gearbox, fidanza flywheel, coilovers stripped interior and bucket seats, and huge brakes, but decided to break it in the hope of going for an Evo. Shame really as it was going to be daft!
Anyway, he sourced a standard B16A2 and fitted that. He gave it a bit of treatment with the laptop that saw Vtec raised to 6200rpm and rev limit tes to 8800rpm. It went rather well for a standard B16. He was going to run it with just the B16 and sell it. We were out in it on friday night, and during a bit of lunacy, the belt snapped at 8500rpm. After we stopped crying form laughter, we started thinking about what to expect once we get the head off.
He has a spare head anyway......
I reckon 16 bent/snapped valves and possibly holed pistons. Maybe even duffed valve guides.
What do you reckon?
[Edited on 05-05-2009 by stan_the_man]
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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Oh and il post pics when done, and we'l see whos right
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mattk
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Registered: 27th Feb 06
Location: St. Helens
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well if all them engine components have come in contact at V-TECH speed quite frankly Id expect to find diamonds
your now rich
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FruitBooTeR
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Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
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No damage at all Vtec engine components never break
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BluKoo
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Registered: 8th Apr 02
Location: Stonehaven (Scotland)
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I assume the engine cut out right after the belt snapped.
Did he try starting it again?
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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quote:
Originally posted by BluKoo
I assume the engine cut out right after the belt snapped.
Did he try starting it again?
The engine just went 'thud' and the needle hit 0rpm. We coasted to a layby and got out and looked. The belt was snapped right through. Not worth trying to start it 
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BluKoo
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Registered: 8th Apr 02
Location: Stonehaven (Scotland)
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Only asking cos my timing belt snapped as i was pulling away from a junction once.
I had no idea what happened, i just thought i had stalled, so i tried starting it...
horrible noises 
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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This was under load and nigh on rev limiter, so its going to be severely fudged. Cant wait to have a look!
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BluKoo
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Registered: 8th Apr 02
Location: Stonehaven (Scotland)
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Well i'm gonna aggree with numerous bent valves.
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Eck
Premium Member
Registered: 17th Apr 06
Location: Lundin Links, Fife
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I reckon 14 bent valves
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Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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im gonna go with about 10 bent valves, 8 goosed guides, deep in dents in the head mopre than likely cracked, and 3 holey/ cracked pistons, and a couple of slightly bent rods, and a couple of scored bores,
apart from that itll be a minter!!!!!
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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Whoever guesses right gets a genuine Honda Inlet valve!
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Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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quote:
Originally posted by stan_the_man
Whoever guesses right gets a genuine Honda Inlet valve!
AT RIGHT ANGLES!!!
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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quote:
Originally posted by Torsa g
quote:
Originally posted by stan_the_man
Whoever guesses right gets a genuine Honda Inlet valve!
AT RIGHT ANGLES!!!
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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quote:
Originally posted by BluKoo
Only asking cos my timing belt snapped as i was pulling away from a junction once.
I had no idea what happened, i just thought i had stalled, so i tried starting it...
horrible noises
My belt slipped a half turn of the bottom pulley on Hogmany when I was trying to bump start it due to a flat battery. I never knew it was flat at the time so tried bumping it twice, ended up with quite a bit of damage.
I could actually hear the 'clickety click' as the valves hit the pistons  , possibly one of the most sickening noises I've ever heard.
When I got the head off I found 16 horrifically bent valves (some bent in an S-shape) and about 8 cracked guides. Think that was just due to the fact that the engine was turning for a couple of seconds with the wheels though I think.
Without knowing the engine, I'd go with 16 badly bent valves and possibly 16 cracked guides due to the rate of knots it was going at. The pistons in mine were fine, but that was at slow speeds - not sure how bad they might be on the civic. I'd go with pistons with little round indents in them but the bores being fine.
[Edited on 05-05-2009 by alan-g-w]
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stu_c
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Registered: 11th Dec 07
Location: Westleigh, Greater Manchester
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when i snapped the belt in the xe at red line i bent all 16 valves and eveyone was open and cracked the head
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philip2
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Registered: 1st Oct 06
Location: n.wales/chester
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belts tend to snap at low revs due to more drag compared to high rpm. if go at high rpm it could be tensioner slackened off, woodruff key sheared etc.
last cambelt failure i saw was a 20xe with all guides flush with face of head and all 16guides broke.
im guessing on the vtec valves, guides, maybe seat damage and piston damaged.....the usual
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Daimo B
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Registered: 20th Mar 00
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Bent valves
very dented pistons.
Prehapes even valves lodge IN to the top of the pistons
If really bad, it could have bent the rods.
But the top half of the engine will be made up of more fragments of dislodge metal than I would want to think about
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stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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Its gonna be a right laugh once the heads off!
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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Bye bye head ans pistons.
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P1CK4D
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Registered: 19th Jun 06
Location: Around Essex Somewhere
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Mine went at 7k rpm. Done all the valves and guides. Forged pistons told them to fuck off 
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Daimo B
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Registered: 20th Mar 00
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D5NNA blew up the day Donna got her, on idle. Bent only 8 valves. Got it under Vauxhall warrantee though and saved £1700 in repair bills....
That was on the 1.6 16v unit. At what, 900rpm??? Nasty at 8000+rpm.
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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£1700 for 8 bent valves? Didn't think Vaux's labour charges were that bad.
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Daimo B
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Registered: 20th Mar 00
User status: Offline
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Done more damage.
Labour costs to remove the head, replace all the parts.
Thats what the receipt shes still got says. Was done under warrantee though so paid nothing.
Imagine it, you've just picked up your fairly new (at the time) Corsa GSi. You get it home, just about to turn it off and pop ding bang!!!!!
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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Can't imagine anything more gutting tbh.
Pics needed of this Civic when it gets cracked open if it's not already been said!
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