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Author c20xe: bottom end fault finding
AK
Member

Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 14:35   View User's Profile U2U Member Reply With Quote
need some help guys,

I wipped the sump off today to have a quick check of the rods. I thought the big end on 1 rod had gone

all looked fine from the bottom tho, and i didnt have a 14/15mm driver to take them off, so i gave up for the day.

any suggestions to what next??

Is it common for the rod/piston end to go more so then the rod/crank end??
James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
21st Apr 04 at 14:42   View User's Profile U2U Member Reply With Quote
Big ends tend to more because of the stresss they have on them (the rotating mothin) more than the mains. esp on the sides of the two shell halfs. look for and nasty striations on the shell surface, what was the symptoms on it?
AK
Member

Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 14:51   View User's Profile U2U Member Reply With Quote
very high rev down shift into 2nd, puff of smoke out the back.... now a very bad diesel rattle

almost a metal on metal slapping
miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
21st Apr 04 at 15:02   View User's Profile U2U Member Reply With Quote
Does it still go alright?

Drop a cap off the rod and check out the shell. Was there any metal in the sump?

Did you check compression?
miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
21st Apr 04 at 15:03   View User's Profile U2U Member Reply With Quote
Remember to use new rod bolts as they are stretch bolts.

Is this your tb'd engine? If so why the feck have you got standard rod bolts! :S
AK
Member

Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 15:07   View User's Profile U2U Member Reply With Quote
nope... this is the old engine, dont worry

there was no obvious metal fragments in the sump..

ok, just checking terminoligy here.....

cap - the end of the rod that is held on by the rod bolts?
shell - where it goes round on crank?

If so, that was my next step but half my tools are bloody missing, no sockets or spanners of the right size
AK
Member

Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 15:07   View User's Profile U2U Member Reply With Quote
what am i on about.... shells are bearings yes?
MikeH
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Registered: 3rd Apr 03
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21st Apr 04 at 15:11   View User's Profile U2U Member Reply With Quote
yep
AK
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Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 15:21   View User's Profile U2U Member Reply With Quote
http://homepage.ntlworld.com/johnnya/max-boost/Cylinder_block.htm
AK
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Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 15:51   View User's Profile U2U Member Reply With Quote
uupp
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
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21st Apr 04 at 17:19   View User's Profile U2U Member Reply With Quote
if its mains it will be a more rumbling sound .. if its big ends it will be more of a knock ..... .. do you think you could of bent a valve over revving it on the down shift??? .. could explain why its running on 3 cyls i know sum1 who bent all his zorst valves on an let mk2 astra... he was redlineing 4th and went for 5th but it went in 2nd lol

[Edited on 21-04-2004 by SportyBoy]
AK
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Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
21st Apr 04 at 19:10   View User's Profile U2U Member Reply With Quote
could be that..... think im just gonna strip the engine for a bit of experience now then plop it in a nova

where are those baggies
BabyBlade
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Registered: 5th Feb 03
Location: Hereford Rides: Ninja 600
User status: Offline
21st Apr 04 at 20:06   View User's Profile U2U Member Reply With Quote
gud luck dude
AK
Member

Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
22nd Apr 04 at 14:35   View User's Profile U2U Member Reply With Quote
rods, caps, shells crank all look ok,

a few slight score, but nothing major

 
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