Shops quote $2,200–$2,800 for this one, and the quote usually isn't the ripoff, the job really is that big. Here's what's actually failing, what the correct repair involves, and the honest part: this is not a job I do in a driveway.
The VQ35HR and VQ37VHR are high-revving V6s with long timing chains kept tight by hydraulic tensioners, and those tensioners depend entirely on engine oil pressure. As the tensioner's internal check valve wears, it bleeds down overnight. On a cold morning the chain runs slack for the first half-minute until oil pressure builds, slapping against its plastic-faced guides. That's the rattle you hear at startup, and every one of those cold starts shaves a little more material off the guides.
Over time the chain itself stretches and the guides wear thin. A stretched chain means the camshafts no longer sit exactly where the ECU expects them, the variable cam timing system can only correct so much. That's when the check engine light comes on with P0011 and P0014 (bank 1 cam timing) or P0021 and P0024 (bank 2), and the throttle starts feeling lazy because the engine is literally running with its valve events out of position.
Left alone, the worn guide material ends up in the oil pan and on the pickup screen, restricting oil flow to the very tensioners that need it. In the worst case a badly stretched chain jumps teeth on the sprockets, and the VQ is an interference engine, so jumped timing means pistons meeting valves. At that point you're not paying for a chain job anymore, you're paying for a cylinder head rebuild on top of it.
If your Nissan / Infiniti is doing any of these, this is the likely cause:
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See how that range compares across Mississauga, Oakville, Milton, Brampton and Etobicoke in the GTA Repair Price Index, honest shop & dealer ranges for the jobs people actually get done.
Timing Chain, Tensioners & Guides Replacement is on my published list of jobs I turn down. It needs a hoist, a press or a machine shop, and I work out of driveways with hand tools. That list is public on my trust page. I'd rather lose the job than learn it on your engine, and you should be suspicious of anyone who says yes to this over the phone.
So here's what I can genuinely do for you, holding a $2,200–$2,800 quote. Both are real, both are flat-priced, and both are worth more than a bad yes.
Before you spend $2,200–$2,800, have someone independent confirm that's actually what's wrong. This is a diagnosis, not the repair, no hoist, no lift, nothing comes apart. I scan it, test it, look at it with you, and tell you straight whether their diagnosis holds up. If it does, I say so and you go pay them with confidence.
Book the second opinion →At $2,200–$2,800 on a car that might be worth not much more, plenty of people replace instead of repair, that's a completely reasonable call. If that's where you're heading, get the next car measured before you hand over money: 150 published points, at the seller's location, written report the same day.
Book a pre-purchase inspection →Tell me what you've been quoted and what the car is doing. $100–$250 flat, at your location, and you get a straight answer either way.
Rather just have the quote read? The free quote check tells you whether the number is in line, no visit needed.
Jobs on this car that ARE mine:
Not so you can do it yourself, so you can tell whether the shop quoting you understands the job:
That's the job. It's why this one belongs on a hoist instead of in a driveway, and it's why $2,200–$2,800 usually isn't a ripoff, it's a big repair honestly priced. What's worth checking is whether that's really what your car needs.
Get the diagnosis confirmed firstPlain version: Timing Chain, Tensioners & Guides Replacement needs equipment a driveway doesn't have, a hoist to get under it properly, a press or a machine shop for the parts that come out, and a controlled space for an engine or gearbox that's in pieces for days. I work out of driveways with hand tools. That's not false modesty, it's the published limit of what I take on, and it's listed on my trust page alongside the warranty.
What that means for you: this page is here to tell you what's failing and what it should cost, so you walk into a shop knowing the job instead of nodding at a number. And if you want that number checked before you pay it, that part I can do, $100–$250 flat, at your location.
Every cold start with a bled-down tensioner files more material off the guides, and that debris circulates through your oil. The end state on a neglected VQ chain is a jumped sprocket on an interference engine, bent valves and a head job that costs several times what the chain replacement does. Catching it while it's still just a cold rattle is the cheap version of this repair.
Sometimes a heat shield or a worn serpentine tensioner mimics it, which is exactly why we confirm first: a cold-start listen, a scan for cam-timing codes (P0011/P0014/P0021/P0024), and a check of cam phasing data. You only get a quote for a chain job if it actually is one.
Always. The labour to open the front of the engine is the expensive part, reusing a worn tensioner or old guides means paying that labour twice when they act up later. The complete kit (chain, tensioners, guides, seals) goes in as one job.
No. Timing Chain, Tensioners & Guides Replacement is on my published list of jobs I turn down, it needs a hoist, a press or a machine shop, and I work out of driveways with hand tools. I'd rather lose the job than learn it on your engine.
Two things, and both are real. A second-opinion diagnostic at your car, $100–$250 flat, at your location, so somebody independent confirms that's actually what's wrong before you commit to a $2,200–$2,800 repair. And if you're weighing replacing the car instead of fixing it, a pre-purchase inspection on the replacement, $149–$399 flat, at the seller's location.
Because the useful part isn't the wrench. It's knowing what's actually failing, what the correct repair involves, and that shops quote $2,200–$2,800 for it, so you walk in knowing the job instead of nodding at a number. If you want that number checked before you pay it, that part I can do.
Send it over for a free second opinion. I'll tell you straight what the job actually involves, and if their quote is fair, I'll tell you that too.
Get a Free Second OpinionOther makes:
I'm not the guy who does this repair. I'm the guy who tells you whether you actually need it, before you spend $2,200–$2,800. Second opinion at your car, $100–$250 flat, in Mississauga, Oakville, Milton, Brampton and Etobicoke.
Book a Second Opinion Inspect a Replacement CarYour options on this one