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06-14-2006, 11:11 AM
#24
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Originally Posted by bonnie94ssei
It'* a good thing I ditched my DOHC Sebring. 
I never really liked that engine, though it'* better than the 2.7 from what I understand 
I never really liked that engine, though it'* better than the 2.7 from what I understand
06-14-2006, 11:15 AM
#25
DINOSAURUS BOOSTUS
Expert Gearhead
Originally Posted by VigCS
are 3800s non interference?
I don't we don't really have to worry about it cause they're pushrod motors...still curious though.
I don't we don't really have to worry about it cause they're pushrod motors...still curious though.
06-14-2006, 11:18 AM
#26
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Originally Posted by bonnie94ssei
It'* a good thing I ditched my DOHC Sebring. I never really liked that engine, though it'* better than the 2.7 from what I understand
I never really liked that engine, though it'* better than the 2.7 from what I understand The 4 cylinder laster a hell of a lot longer and was better by far...
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06-14-2006, 11:29 AM
#27
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Originally Posted by VigCS
are 3800s non interference?
I don't we don't really have to worry about it cause they're pushrod motors...still curious though.
I don't we don't really have to worry about it cause they're pushrod motors...still curious though.
If we look at the old 3.0 Buick V6, really a shorter stroke 3.8( yes shorter deck heigth too ).... It was not supposed to be an interference engine.... But with the 3.0 having 9.0 - 1 compression pistons, the dish was very shallow and didn't leave much room for the valves.... What usually happened with these motors if that the Nylon Teeth would strip off the Cam gear and the result is that the engine would jump time... I have seen a couple of 3.0'* that were running down the interstate when this happened, and all of the valves left marks on the pistons, crushed a couple of valves and bent a series of pushrods...
The 3.8 and 3800 had 8.5 - 1 compression for many years... I have seen the 3.8'* jump time as they used the same nylon teeth on the cam gear for a while, I have never seen a 3.8 get damaged.. They would just jump a tooth and have hard starts, bad idle, and then finally when it jumped further it just quit...
With the 3800 GM tried to correct for these problems... An all steel cam gear with a timming chain tensioner... I have almost never heard of a 3800 jumping time, but its still possible...
On the L36 we have 9.4 - 1 compression, and the pistons are damn near flat... I would be willing to bet that if one of these L36'* jumped time we'd know about it in a hurry... But when was the last time you heard of an L36 doing this? I have seen LN3'* all original with 300K+ on them all original.... So weather or not we'll see one jump time will only be seen in the future
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06-14-2006, 11:52 AM
#30
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Originally Posted by Bonneville94V688
Originally Posted by bonnie94ssei
It'* a good thing I ditched my DOHC Sebring. I never really liked that engine, though it'* better than the 2.7 from what I understand
I never really liked that engine, though it'* better than the 2.7 from what I understand Just looking at that engine gives me a headache. It looks like a mess.My Sebring is at 43K and would have been due for a timing belt change within a year the rate I drive. I'm glad I really don't have to worry about bending valves if my chain should go.
Which brings up a question...what'* the interval of changing the timing chain on our engines? How much over 100K in other words? If a water pump should go I guess it would be a good time to change it too.
