Thanks for your answer Andrew, does the extra cost and trouble for the
headgasket bring any benefit, as in torque?
What about re-using the head gasket in case I stay with 87 mm?
I am leaving for Malvern/England tomorrow and might as well see if I can
bring the parts I need.
-----Oorspronkelijk bericht-----
From: Andrew Uprichard
Sent: Tuesday, August 06, 2013 2:12 PM
To: 'Jerry Van Vlack' ; 'Jaap Dekker' ; triumphs@autox.team.net
Subject: RE: [TR] Pushrods tr4 engine won't go back down.
"deep scars" and "excessive oil consumption" might suggest it is indeed time
for a rebuild.
Two of my TR3s have 89 mm pistons and liners. The only "hurt" is that the
pistons cost more. As far as the head gasket is concerned, you will need to
buy the 89mm gasket as the other gaskets will not work.
Andrew Uprichard
-----Original Message-----
From: triumphs-bounces@autox.team.net
[mailto:triumphs-bounces@autox.team.net] On Behalf Of Jerry Van Vlack
Sent: Tuesday, August 06, 2013 7:33 AM
To: Jaap Dekker; triumphs@autox.team.net
Subject: Re: [TR] Pushrods tr4 engine won't go back down.
You might experience head gasket sealing issues with 89mm stuff. It would
take some extra care. Randall has a method that I'm sure he can show you if
you decide to go that route.
JVV
-----Original Message-----
From: Jaap Dekker
Sent: Tuesday, August 06, 2013 6:40 AM
To: triumphs@autox.team.net
Subject: Re: [TR] Pushrods tr4 engine won't go back down.
I have examined the head and although there's a lot of carbon junk in the
cavities and on the valves, it looks like my problem might be something
else. I took the dirtiest exhaust valve out and cleaned it with a wirebrush,
it looks ok. The guides are bronze and there is little play. If the rest is
like this I will put it back together and leave it like that.
When I looked into the cylinder liners I found what could be the reason for
the excessive oil consumption. Number three and four had deep pitting where
the gudgeon? pins rest in tdc on both sides. There are also deep scars
running straight down. I suspect the circlips have failed.
I wiil have to dig into the bottom end now. I could use some advice on how
to proceed.
I expect I will have to replace all liners and pistons?
There's 87 mm in there now. Would it hurt to go to 89 mm?
Regards,
Jaap Dekker
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