23 December, 2024, 12:45:30 AM
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
News
:
Need to contact the Forum Administrator? e-mail
forum.admin@lanciamc.co.uk
- Copy deadline for Viva Lancia is 12th of each month. - For Events e-mail
events@lanciamc.co.uk
- To Join the club go to
http://www.lanciamc.co.uk/join.htm
Home
Help
Search
Calendar
Register
Lancia Motor Club
>
Model Technical and Interest
>
Augusta
>
Camshafts
Pages: [
1
]
Go Down
« previous
next »
Print
Author
Topic: Camshafts (Read 956 times)
0 Members and 1 Guest are viewing this topic.
MichaelElsom
Member
Posts: 36
Camshafts
«
on:
28 February, 2024, 11:59:27 AM »
Sorry to bore everyone with yet another of my little problems.
After a great deal of delay, the head was finally removed to discover the cause of water in what now appears to be two cylinders. This revelaed a small crack which was not only external but also internal. The ful effect of this must have been hidden by KSeal which was present in the engine before the new radiator but I chose not to add again.
Bearing in mind that the head on the car not only has this crack but also a blockage in the crucial water passage around the exhaust at the back of the head which has so far refused all attempts to shift it, we have decided to use the head off the spare engine. I may have bored some of you already with problems we found with attempting to use that without too much work so the plan not to mix the two engines has been parked.
As with all my decisions, this one soon proved to have its own agenda - the two camshafts have different bearing journal sizes. This is a problem because the camshaft and rockers on the spare engine look as though they have been run without too much oil and are all badly scoured. The original camshaft has - yes you've guessed - the bigger journals.
Chatting to both James P and Mike C suggested that there should be no problem in line boring the head to take the bigger camshaft, but I remain concerned that the centre bearing housing in the head is directly above the inlet tract. According to my (Aldi sourced.....) micrometer suggests that the difference in journal size is 37.93 mm against 38.30 - so .37 mm approx. To this must be added the recommend clearance between camshaft and housing of 0.025 ÷ 0.098. We are not talking a lot but before getting anyone to remove metal, has anyone got any wisdom on this topic.
Interestingly the two camshafts are not identical in other respects and I wonder if at some stage the one in the spare engine has been reground or re-machined already. As you will have gathered I am trying to avoid the expense of a camshaft rebuild and serious work on the rockers!
Logged
Running Board
Senior Member
Posts: 143
Re: Camshafts
«
Reply #1 on:
28 February, 2024, 03:28:33 PM »
as mentioned to you , my Australian friends have already done this by hard chroming the camshaft over size the line boring the head to suit with no issues at all , another has bored out the head and retro fitted bronze bearings to take up the wear , you need to be careful as the heads do wear and you get a huge oil pressure drop as a result , this is the same on Astura engines too where the cam bearings and rocker shafts wear , dropping oil pressure reading at the head alarmingly , any good engine specialist would be able to help you , Bradbury's who are doing the white metaling on my Belna engine would certainly sort it for you
Logged
When it comes to Lancias, mine are State Of The Ark!
Pages: [
1
]
Go Up
Print
« previous
next »
Jump to:
Please select a destination:
-----------------------------
General
-----------------------------
=> About the LMC Forum
=> General Chat
=> Press/Media: Lancias mentioned, seen or wanted!
=> Competition Information
=> Events 2024
=> Events 2025
=> Local Events
=> LMC Legends
=> Links
-----------------------------
Model Technical and Interest
-----------------------------
=> Pre-Lambda
=> Lambda
=> DiLambda
=> Artena and Astura
=> Augusta
=> Aprilia, Ardennes and Ardea
=> Aurelia
=> Appia
=> Flaminia
=> Flavia
=> Fulvia
=> Stratos
=> Beta and Montecarlo
=> Gamma
=> Delta and Prisma
=> Dedra, Thema and Delta (2nd series)
=> Ypsilon, Musa and Y10
=> Kappa
=> Thesis
=> Delta (2008-)
=> Commercial Vehicles
=> Other Lancia Models
-----------------------------
Buy, Sell and Search
-----------------------------
=> Members' cars for sale
=> Lancia vehicles for sale
=> Lancia vehicles required
=> Spares for sale
=> Spares required
-----------------------------
Events Archive
-----------------------------
=> Events 2011
=> Events 2012
=> Events 2013
=> Events 2014
=> Events 2015
=> Events 2016
=> Events 2017
=> Events 2018
=> Events 2019
=> Events 2020
=> Events 2021
=> Events 2022
=> Events 2023
Loading...