2003 kia 3.5L interference type engine? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-03-2010, 03:03 PM
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2003 kia 3.5L interference type engine?

are the 2003 sedona 3.5L engines interference type?

whats the timing belt replacement interval for these and how many cams do they have in each head?

this one has 199k miles and AFAIK all original never opened up

and it just quit running and just whips right over like no compression after it was running perfect the other day

we replaces serpentine belts on it and it drove out of here fine for about 20 miles and it threw the p/s belt and thats it, done.. not running any more..
we replaced the p/s pump a couple months ago as well.

so hmm..

what do you think?
thanks

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Last edited by fast68; 11-03-2010 at 03:12 PM.
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Old 11-03-2010, 03:29 PM
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yea, I'm pretty sure there interference... I know my brothers 1.9L Sephia engine was interference, or supposto be. and the belt snapped. but he got lucky and put another on and drove the car for another 40k miles before it just got too rotted
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Old 11-03-2010, 05:20 PM
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Serpentine belt is not timing belt. Yes these are interference engines. Sounds like the valve train is shot.

At 199 thousand miles the repair bill could possibly exceed the value of the car. Best bet is get a good used set of heads. The last one of these engines I got in had all valves bent and half of the v-guides cracked. Well over $700.00 to fix heads and the gasket set ain't cheap. Plus parts and labor to r/r $$$$$$$$$$$

Good luck.
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Old 11-04-2010, 08:20 PM
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hi there

ok well i never said serpentine is timing belt lol


i said we replaced the exterior belts

but thats it

i have no idea about the timing belt when or if its ever been done the current owner never has replaced them and thats all anyone knows

so i ahve to assume at 198k miles its the original timing setup in it and is blown and so thats why i needed to find out if this engine is interference type or not, in which most timing belt engines seem to be

right?

is that the rule of thumb to go by?

we havent gotten the to the van again yet since this happend the other day, so i dont know exactly anything yet, but when we do get it back i plan on pulling timing cover upper enougih to see if belt moves or is loose or what

and check compression


but if its interference type then well im 90% sure im not going to repair the engine.

especialy if its DOHC design and so on,.

would be better off replacing entire engine but IMHO the vans not really worth a new engine really, hmm... but nothings in stone until we get the van back and talk to the owner and see what he can spend or not spend on it ATM.

thanks!
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Old 11-04-2010, 08:46 PM
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Kia makes throw away cars.
by 200k they need a lot.Parts are exspensive but the cars are cheap. Thats how they get you.
Pull the valve covers and look to see if there are any bent valves. You will see them by all the play between the cam follower and the valve head as a bent valve will not fully close and will be evident by the excess lash between the followers and valve stems. Pulling the timing belt covers will only tell you if the belt is broken.Pulling the valve covers answers a lot of questions.
You might get it going with a new belt.
It is a 4 cam engine.
A lot of repair manuals state that engines are interference engines and that is not the case.More often or not it is the luck of the draw.
Do your diagnostic homework, save yourself teardown time.
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Old 11-04-2010, 08:50 PM
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KIA is a hamsterwagon anyhow LOL
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