Cam Bearing Size

[Rippthrough 98]

Anyone know the size of the TU3MC cam bearings?

Need to change the headgasket and my new head isn't ready yet, so thinking about bunging an xs cam in there for a little more poke at the top end, but IIRC the two don't share the same bearing size?

[christopher 5 1 Cars]

AFAIK all tu3's carry the same bearing size..of course XS included (TU3S)

[Sandy 191]

Except the TU3J (106 XSI).

[Rippthrough 98]

Phew, few more ponies for the old girl then.

 

Cheers lads, I shall blame you lot if it goes tits up then.

Edited December 14, 2007 by Rippthrough

[Rippthrough 98]

Ok, question no.2 - how hard is it to change the cam in-situ by jacking one side of the engine up?

My cousin wants one of my spare xs cams for his 306 after seeing what I was up to in case your wondering.

 

Far easier to do it normally and take the head off?

He's not keen on that even after a I told his its an easy job, 'cause the headgasket/belt/tensioners were only done last week

[Jrod 7]

IMO, F-ing nightmare. You'd have to undo all the engine mounts to get enough movement I think.

[Rippthrough 98]

I'll leave him to that one then

[calvinhorse 870]

it would be a bastard getting it past the rockers would'nt it?

[RossD 44]

Yep, in theory its possible, but in reality was possible and whats realistic are two eniterely different things!

It's not as if its hard to take the head off on a TU really, even an injection one. Whip off the head, change the cam, jobs a goodun!

[Rippthrough 98]

Just to follow this up I was at the catcams stand at the autosport show on friday and their catalogue actually lists the TU3MC as having the larger bearing sizes, as opposed to most of the range running small bearing sizes?

 

Not that it matters 'cause I'm putting the 3S head on now anyway.

The camshaft has some marks from swarf damage which I'm not happy about though - has anyone got a Rallye or 3S cam going spare?

 

 

Edit - does the S1 rallye have the same size journals as the TU3S, anyone know?

Edited January 12, 2008 by Rippthrough

[swordfish210 20]

has anyone got a Rallye or 3S cam going spare?

Edit - does the S1 rallye have the same size journals as the TU3S, anyone know?

I'll have a TU3-A cam spare in a couple of weeks thet you can have if you still need one

[Rippthrough 98]

I'll have a TU3-A cam spare in a couple of weeks thet you can have if you still need one

 

Thanks for the offer but I need the engine back together by midweek.

 

I might try to repair this one by polishing it down but I don't think I can saftely build the ceramic coat up to the level it would need to get back to the right clearance after flatting the scuffs off.

 

Cheers though.

Edited January 12, 2008 by Rippthrough

[Sandy 191]

The 106 Rallyes (S1 and S2), 1.4 and 1.6 XSi all have the large bearings. TU3S, M, 3.2, 3a etc all have small bearings.

[Rippthrough 98]

The 106 Rallyes (S1 and S2), 1.4 and 1.6 XSi all have the large bearings. TU3S, M, 3.2, 3a etc all have small bearings.

 

 

Cheers Sandy, catcams have been confusing me again

 

Really should fetch my vernier from the workshop, but the cars in pieces and it's 6 miles away...

[calvinhorse 870]

i have a rallye 1.3 cam for sale £100 ish delivered make me an offer!

[calvinhorse 870]

it would be a bastard getting it past the rockers would'nt it?

 

how the hell did this post get in this thread?? wtf

[Rippthrough 98]

I bit the bullet and ground this one down for now, I might have that one off you if you still have it in the summer though, as I've a bare rallye head coming next month.

[calvinhorse 870]

if i still have it

[Rippthrough 98]

if i still have it

 

If not I'll have to buy a catcam, can't be helped

[calvinhorse 870]

what a shame that would be

[Rippthrough 98]

I did something right anyway, 98bhp@6200 (rev limiter) and 96lb ft

[Sandy 191]

Sweet!

[Rippthrough 98]

Sweet!

 

 

I nearly had a heart attack earlier when I realised I'd filled up with 95

Ran Ok though, have to top it up with 98 for when the warm weather comes in though, it's had 0.8mm off the head

Certainly got some midrange, and the extra compression and port work has made that 8v soundtrack even louder

 

The only problem is either the fuel pump or the throttle pot has just given up!

Not bad for 2-figure rebuild

Edited January 20, 2008 by Rippthrough

[Jrod 7]

We just got 95bhp on a standard XS at JKM (who were recently in PPC saying how good they were)

 

Do they usually make more than book power?

[Rippthrough 98]

We just got 95bhp on a standard XS at JKM (who were recently in PPC saying how good they were)

 

Do they usually make more than book power?

 

 

Hope not or my compression bump and port and chamber work has done sweet feck all