How weak are my 98 rods and rod bolts??
07-25-2008, 08:04 PM
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How weak are my 98 rods and rod bolts?? I'm about to do a heads/cam swap on my car, it's a 98 with 103,000 miles. Stock internals for it's whole life and bolt ons since about 70,000.
I'm looking at a texas speed H/C package with some ported PRC heads. I'm not looking for a redline over 6,300 or 6,400, so do I need to upgrade my rods or rod bolts?
I'm looking at a texas speed H/C package with some ported PRC heads. I'm not looking for a redline over 6,300 or 6,400, so do I need to upgrade my rods or rod bolts?
07-25-2008, 08:20 PM
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Unless you're running nitrous or forced induction, you should be fine. 
The rod bolts are the "weak link" and the unwritten rule is they are good to 550RWHP.
The rod bolts are the "weak link" and the unwritten rule is they are good to 550RWHP.
07-27-2008, 06:44 PM
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I've heard this to but it's not like you see posts all the time about people with 98's blowing there rod's apart. I think there was just some incidents where a few poeple had problems, and now people think the 98 rod bolts are junk. There's many people spinning 98's to 6700 rpm. My buddy spun his to 6500 rpm no problem.
07-27-2008, 07:09 PM
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The one in the pic attached came out of a 1998 TA with 113,000 miles.
It was bone stock, A4, 2.73's. I got a real good deal on it because it had a real bad misfire, even drove it 5 miles home like this. Notice the bolts still intact.
It was bone stock, A4, 2.73's. I got a real good deal on it because it had a real bad misfire, even drove it 5 miles home like this. Notice the bolts still intact.
Last edited by 9000th01ss; 01-06-2009 at 09:56 AM.
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07-27-2008, 11:59 PM
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Yea, I bought it real cheap too because it ran like ****. It didn't make any noises at all, never expected it to be a blown rod.
In fact the girl I bought it from said she'd been driving it for months like that.
No idea how a stock car could have done this though, maybe running 87 octane forever? I don't know.
The guy I sold the engine to just deburred the little chunk off the bottom of the cylinder, honed it and put a used one back in.
In fact the girl I bought it from said she'd been driving it for months like that.
No idea how a stock car could have done this though, maybe running 87 octane forever? I don't know.
The guy I sold the engine to just deburred the little chunk off the bottom of the cylinder, honed it and put a used one back in.
