 New engine tragedy, Broken valve stem |
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| Jetsetsurfshop |
 Apr 2 2016, 06:36 PM
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Senior Member  Group: Members Posts: 814 Joined: 7-April 11 From: Marco Island Florida Member No.: 12,907 Region Association: South East States  |
On my first outing with the new engine tragedy struck. While giving it a little bit of RPM the engine made a noise I never heard before and then dropped a cylinder. Limped it home and this is what I found today.
That's the top of the valve you see still with the keeper! Damn. Anyone have any thoughts on what happened here? Everything we did was the same as the last build except we installed a more aggressive camshaft. (IMG:style_emoticons/default/headbang.gif) Attached thumbnail(s) 
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| Mark Henry |
Apr 3 2016, 06:40 AM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
(IMG:style_emoticons/default/agree.gif)
I'm guessing that the cam is a Scat C-55, way too much for that stock valvetrain. When you get there I still want to see how the head looks at the valve guide boss. I'd also like to see the other side with the intact rockers. |
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Posts in this topic
Jetsetsurfshop New engine tragedy Apr 2 2016, 06:36 PM
Jetsetsurfshop Oh yeah
Broke the rocker arm too.
:headbang: Apr 2 2016, 06:37 PM Mark Henry Ouch :(
what valves are those? Used stock? Intak... Apr 2 2016, 06:59 PM
Jetsetsurfshop
Ouch :(
what valves are those? Used stock? Inta... Apr 2 2016, 07:05 PM stugray
Ouch :(
what valves are those? Used stock? Int... Apr 2 2016, 07:31 PM Jetsetsurfshop
[quote name='Jetsetsurfshop' post='2325100' date=... Apr 2 2016, 07:36 PM stugray
Did you have valve relief pockets in the pistons... Apr 3 2016, 09:48 AM Mark Henry
Ouch :(
what valves are those? Used stock? Int... Apr 2 2016, 10:00 PM fixer34 If that is the valve spring retainer, then you did... Apr 2 2016, 08:17 PM Valy That's a lot of lift for stock adjusters. The ... Apr 2 2016, 08:52 PM Cracker Bummer! I hate to see that...it IS part of the... Apr 2 2016, 08:53 PM Jetsetsurfshop Didn't mean to be so vague. I've never see... Apr 3 2016, 05:08 AM The Cabinetmaker I'm confused. Bigger valves, monster cam, dual... Apr 3 2016, 05:48 AM McMark I would love to see the valve train geometry befor... Apr 3 2016, 06:32 AM Jetsetsurfshop Cabinetmaker
I meant stock rocker arms. Sorry.
Th... Apr 3 2016, 08:14 AM HAM Inc The valve breaking in that position is a classic s... Apr 3 2016, 10:18 AM |
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