The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
It is currently Thu Mar 28, 2024 7:04 pm

All times are UTC




Post new topic  Reply to topic  [ 26 posts ]  Go to page Previous 1 2
Author Message
PostPosted: Mon Jul 11, 2022 2:31 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
Anyone know where I can get uprated valve springs?

I've just been googlingand I can see this is going to be an issue (assume one has failed but that seems like a certainty)


Top
   
PostPosted: Mon Jul 11, 2022 4:06 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 5:48 pm
Posts: 8446
Location: Winscombe, North Somerset, England
You don't need uprated valve springs for that cam. They will only deprive you of a few BHP.

_________________
Sprintless for the first time in 35+ years. :boggle2: ... Still Sprintless.

Engines, Gearboxes, Overdrives etc. rebuilt. PM me.


1997 TVR Chimaera 450


Image


Top
   
PostPosted: Tue Jul 12, 2022 12:37 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
Good advice thanks

And luckily it's also proving the case that you should never throw anything away.

Yes, you last saw them 20 years ago. They are here in a box to be with you tonight.

The original valve springs :


Attachments:
ScreenShot692.jpg
ScreenShot692.jpg [ 75.27 KiB | Viewed 204 times ]
Top
   
PostPosted: Sat Jul 30, 2022 8:10 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
I thought I was overdue an update.

It's not good really but thats more related to follow on issues. Below is a picture of what greeted me on inlet valve 3 after removing the cam. So basically the spring broke, the valve stayed down (but I guess not wedged there), the cam bucket edge got destroyed, the valve collets were wrecked, the valve got bent at the end (face no longer at right angles to stem) and the pallet shim snapped in half !

On the plus side the piston is OK, the head gasket was OK and with one exception everything came apart nicely.

The exception is that two bolts on the head end plate sheared off. Of all the things, normally such a non event. And in trying to remove the remains with a screw extractor I : a. failed in both cases b. a screw extractor snapped in the hole. You couldn't make it up.

It is also obvious the car was running very rich. Carbon and deposits all over the place. For whatever reason it has BAP needles which looking at mintylamb are not suitable. Valves ok apart from oily carbon gunk on the back of some of them

Presuming the end plate bolt issue is professionally resolvable this head could go back on. But I think there is also play in the valve guides - some valves have worse deposits on their curved rear sides and it "seems" like these are the one with more play. Plus the head was skimmed in the past so it's life is also finite.

I will seek to get the sheared bolt problem resolved and it should be OK to get refitted.

But see other thread about spare cylinder heads. It may be time to swap over.

cheers


Attachments:
ScreenShot704.jpg
ScreenShot704.jpg [ 108.32 KiB | Viewed 167 times ]
Top
   
PostPosted: Sat Jul 30, 2022 8:25 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Mon Apr 18, 2022 10:33 am
Posts: 12
If the bolt issue can be resolved I would have new valve guides fitted to the existing head and recondition it. You know its history. Anything bought off ebay is an unknown quantity and may require more work than the head you have.

Just my thoughts and the way i would fix the issue.

Philip


Top
   
PostPosted: Sat Jul 30, 2022 9:01 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
Philip of SprintParts?

Yes good advice. And likely the way I will go.

But.... if I can find an unskimmed head perhaps already refurbed then I'm likely in a better and cheaper spot than where I would be refurbing my skimmed head in terms of parts and labour. Maybe.

I don't know. I feel like valve guides are probably a tenner.20 quid each to fit?

Whatever happened to Sprintparts? #sadface

I've got your radiator shroud on the car ;-)

m


Top
   
PostPosted: Sat Jul 30, 2022 10:17 am 
Offline
TDC West Mids Area Organiser
User avatar

Joined: Thu Sep 28, 2006 1:13 pm
Posts: 13316
Location: Over here...can't you see me?
'Easi-out' screw extractors always snap and compound the problem as they are hardened steel (don't worry, we've all learned the hard way!! :oops: )

The folk who recondition callipers for the club frequently encounter them sheared off in stuck bleed nipples and unions and generally succeed in removing them, using spark erosion, I think, but again, due to the hardened steel it's a much longer process than just removing mild steel


Top
   
PostPosted: Sat Jul 30, 2022 10:44 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
I was mindful that might happen but hoped for the best and lost.

Of all the things that could be a problem removing the head, the bolts on the end plate were the last thing I expected. The remains haven't budged at all.

Now it needs a pro workshop. But if I hadn't tried it still would have. And I got a refund on the crappy tool that busted


Top
   
PostPosted: Sat Jul 30, 2022 2:47 pm 
Offline
TDC West Mids Area Organiser
User avatar

Joined: Thu Sep 28, 2006 1:13 pm
Posts: 13316
Location: Over here...can't you see me?
Interesting percussion marks on the cam carrier there...looks as if someone has taken a centre punch to it!


Top
   
PostPosted: Sat Jul 30, 2022 4:02 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
I have photos of all the cam journals. I was going to post them. None of them look great.

Actually here they are. Probably not as bad as the photos make them aware but still not great


Attachments:
ScreenShot708.jpg
ScreenShot708.jpg [ 54.21 KiB | Viewed 144 times ]
ScreenShot707.jpg
ScreenShot707.jpg [ 62.28 KiB | Viewed 144 times ]
ScreenShot706.jpg
ScreenShot706.jpg [ 67.07 KiB | Viewed 144 times ]
ScreenShot705.jpg
ScreenShot705.jpg [ 59.39 KiB | Viewed 144 times ]
ScreenShot704a.jpg
ScreenShot704a.jpg [ 41.02 KiB | Viewed 144 times ]
Top
   
PostPosted: Fri Nov 04, 2022 11:49 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Sun Sep 20, 2009 4:27 pm
Posts: 362
Location: Perth, Australia
An update for those that are interested :-)

UK visit done and spare cyl head ....... not brought back. All advice is the current head is very good and barely skimmed.

The sheared bolt problem was resolved without the need for head welding or skimming. I have ground the valves and put the exhaust ones back in. Inlet next and checked of timing chain tensioner and then it can all start to be re-assembled

Before and after for the cyl head :


Image



Image


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 26 posts ]  Go to page Previous 1 2

All times are UTC


Who is online

Users browsing this forum: Robert 352 and 21 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited