About to do a major tune up on my 90 K5 5.7 TBI just clicked over 200K, but not sure if it is worth doing the timing chain. Truck runs perfect, no timing issues at all but since im doing plugs, wires, hoses, tbi mods, etc... I do not know if I should let it be till I have to replace water pump or truck starts to have issues. Thanks guys!
CK5
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Timing Chain
- Thread starter msb350
- Start date
Keep this is mind, SBC's are an interference engine. If the timing chain breaks or has enough slop to jump teeth you'll end up with bent valves. FWIW, i just replaced my old engine that had 240K on it and had never been apart (no timing chain replaced).
shaun89
1/2 ton status
well you can pick up a new timing chain/gears for id say $50 or so, so if you have the extra money, you might as well.just my opinion. and a water pump is i think $30. i just hate not replacing or doing something i should and it biting me in the A$$ down the road...literally
Yes, Cloyes is the best timing set you can buy. No need to buy anything really fancy, just a normal double roller chain set.
DPI
1/2 ton status
I replaced my factory setup with a double roller with the cam shaft advancement key way. I set the cam 4 degrees advance to help with the lower end. I can't really tell any difference set that way though.
I had about 120K on mine when I did the r&r. The factory chain had about 1/2" of movement, so it was probably time for it. But, I have seen them so loose they would slap the timing chain cover...And they would still run. I have not seen one break though, but they are known to skip teeth when loose...
I had about 120K on mine when I did the r&r. The factory chain had about 1/2" of movement, so it was probably time for it. But, I have seen them so loose they would slap the timing chain cover...And they would still run. I have not seen one break though, but they are known to skip teeth when loose...
shaun89
1/2 ton status
ya my friend had a 92 dakota he was bagging and every since he drove it, it had this slapping weird sound, he did some research and found out that its basically "normal" for older dakotas to do have a timing chain so loose it slapped the cover. i guess it was a bad flaw in those trucks. but it went through hell and never blew up....somehow.
At 200k, I would say you should throw a new double-roller set in it. The stock nylon gears are notorious for stripping off the steel piece. It's better safe than sorry, right? Just my 2 cents.
