Bent valves

Keep it on topic, it will make it easier to find what you need.
Post Reply
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Bent valves

Post by fiat218 »

So my friend got his engine together and when he set the timing and got the belt on, he rotated the engine and bent the valves
So what did he do wrong , I don't know the whole story as in how this happened,
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
BEEK
Posts: 1833
Joined: Wed Mar 24, 2010 10:45 pm
Your car is a: 1975 Spider
Location: clermont fl

Re: Bent valves

Post by BEEK »

something was not right, did he change the cam gears, he may have them on the wrong cams, that is the first thing i would look for
Automotive Service Technology Instructor (34 year Fiat mechanic)
75 spider
, 6 Lancia Scorpions, 2018 Abarth Spider, 500X wifes, 500L 3 82 Zagatos. 82 spider 34k original miles, 83 pininfarina, 8 fiat spider parts cars
son has 78 spider
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

All new stuff, I told him to call you, but I don't think he did,
I told him, that is why my car is in Florida, lol I want mine done right.
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
vandor
Posts: 3996
Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: Bent valves

Post by vandor »

He did not turn the engine over BY HAND two revolutions to be sure nothing will touch.
Csaba
'71 124 Spider, much modified
'17 124 Abarth, silver
http://italiancarclub.com/csaba/
Co-owner of the best dang Fiat parts place in town
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

He did turn it,, he heard and felt something, but it was to late
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
User avatar
toplessexpat
Posts: 1183
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: Bent valves

Post by toplessexpat »

He turned it by hand, felt something, so fired her up just to make sure that it really was a problem? :roll:
---
Many classic Fiats - it's a disease!
www.mirafiori.com
User avatar
Kevin1
Posts: 399
Joined: Tue Feb 17, 2009 8:55 pm
Your car is a: 1980 Spider 2000 FI
Location: Maine, USA

Re: Bent valves

Post by Kevin1 »

If the engine is turned by hand it should be possible to determine if there is anything interfering without necessarily bending the valves. Has the head been removed to confirm that the valves are actually bent?
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

yes, it has been confirmed
acutally when he turned the engine over he did feel a thumping , he thought the aux shaft was being nudged a tad, im not sure what the whole story is
as i know of he did time the engine thru number 4.
set the cam wheels to there marks. set all the other stuff and then set the belt on. so i guess something was not timed correct
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

the head was from vicks auto, it was not done by him or anyone from our area, so im sure the head was done correct etc
he said the gasket may have been on and the head and top of pistons could have been to close. so im not sure
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

toplessexpat wrote:He turned it by hand, felt something, so fired her up just to make sure that it really was a problem? :roll:
no it has not been running
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
User avatar
toplessexpat
Posts: 1183
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: Bent valves

Post by toplessexpat »

He bent the valves by turning it by hand? :shock:

So - as previously mentioned - has the head been taken off to confirm the valves are damaged?
---
Many classic Fiats - it's a disease!
www.mirafiori.com
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

toplessexpat wrote:He bent the valves by turning it by hand? :shock:

So - as previously mentioned - has the head been taken off to confirm the valves are damaged?
Yes it is confirmed and yes they bent when he turned it by hand, the engine has not been started
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
User avatar
seabeelt
Patron 2019
Patron 2019
Posts: 1614
Joined: Tue Feb 19, 2008 4:22 pm
Your car is a: Fiat Spider - 1971 BS1
Location: Tiverton, RI

Re: Bent valves

Post by seabeelt »

Silly Question. How was the head packaged and shipped - possible shipping damage and not set up damage???? I would think you would feel the pistons hitting the valves if turned by hand, especially with the plugs out.
r/
Michael and Deborah Williamson
1971 Spider -Tropie’ - w screaming IDFs
1971 Spider - Vesper -scrapped
1979 Spider - Seraphina - our son's car now sold
1972 Spider - Tortellini- our son's current
User avatar
Kevin1
Posts: 399
Joined: Tue Feb 17, 2009 8:55 pm
Your car is a: 1980 Spider 2000 FI
Location: Maine, USA

Re: Bent valves

Post by Kevin1 »

Any update on this, I am curious to find out what happened to the valves. With the larger valves could it have been valve to valve contact that bent them?
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Bent valves

Post by fiat218 »

I am not sure what is going on, I have not talked to my buddy,
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
Post Reply