Stuck Crank? - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

displaying posts 1 to 11 of 11

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Subject: Stuck Crank?

damon

Newbie

Location: Newcastle Upon Tyne

Registered: 04 Jan 2003

Posts: 10

Status: Offline

Post #1

Busy rebuilding my gti6 engine with wossner low compression pistons. Just finished putting the pistons and crank back in the block, and torqued it all up and now I cant get the crank shaft to turn? It was turning ok with one piston in and then by the time they were all in it was very stiff, then I torqued everything up and it was extremly stiff, I managed to turn it one revolution, then left it overnight and this morning it wont turn at all. Ive tried turning it using the crankshaft pulley nut with a socket on and a ratchet but I dont want to risk putting any more force on it for fear of snapping the bolt. Is this normal?

Thanks in Advance for any help

Posted 14th Jun 2012 at 22:41

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fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

Status: Offline

Post #2

pm rich w mate !!!

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Posted 14th Jun 2012 at 22:42

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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

Status: Offline

Post #3

Sounds like you have an incorrectly sized bearing in there, I've seen it once before. But yes as the man says, pm rich w! Thumbs up

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Posted 14th Jun 2012 at 23:04

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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #4

No, it's not normal.

You should have put the crank in, fitted the main bearing caps and made sure the crank turned freely, torqued the caps down and checked again.
If all was ok, then go about installing the pistons and rods, and after you install each one and torque it up see if you turn the crank freely. When you put one in and then you can't turn it freely anymore you know which one is causing the issue. As Jeffers says it could be an incorrectly measured bearing which is giving you trouble.

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Posted 14th Jun 2012 at 23:14

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rallyeash

Seasoned Pro

Location: Devizes

Registered: 11 Dec 2006

Posts: 4,424

Status: Offline

Post #5

Should measure the running clearances anyway with something like plastigauge.
If you undo all the bearing caps should soon free again? If so means tight bearings

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Posted 15th Jun 2012 at 08:02

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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline

Post #6

It's most likely that you have the main bearing caps the wrong way round, I did this myself and had the same problem. Number one cap or number 5 cap is'nt marked and if you start in the wrong order they all are wrong. Try them the other way round in 180 degreee order 1-5 to how you have them now. (One of them will be very obvious where it goes, but there is the possibility to get it wrong with the rest.)

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Posted 15th Jun 2012 at 09:01

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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #7

That's an interesting theory Jim... Yes

I take it Damon, that you lubed the journals and shells up before you installed them with something like graphogen paste or similar?

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love

Posted 15th Jun 2012 at 11:06

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woody.

Senior User

Location: London

Registered: 18 May 2009

Posts: 799

Status: Offline

Post #8

stan_306gti6 wrote:

I take it Damon, that you lubed your ringpiece up with something like graphogen paste or similar?

I joke, I joke

Posted 15th Jun 2012 at 14:09

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damon

Newbie

Location: Newcastle Upon Tyne

Registered: 04 Jan 2003

Posts: 10

Status: Offline

Post #9

Thanks for all the help guys, Turns out the crank was free when I stripped it down It was the big ends that were tight. Turns out when the guy had my pistons and rods when he was reboring the block hes had a play with the rods and put 3 of the end caps on the wrong way. Put them back the right way, they line up, torqued everything up and hey, the crank spins fine again!! Now I just need a new piston ring to replace the one ive now snapped! Great day eh!!

Posted 15th Jun 2012 at 22:01

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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline

Post #10

Doh!

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Posted 15th Jun 2012 at 22:10

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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #11

Glad this is sorted now, and a fairly easy mistake.

As for the snapped ring... Doh

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love

Posted 15th Jun 2012 at 23:39

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