Valve Job - Bay Area/Sacramento, CA??? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

TNT79Bronco · 07-10-2019, 03:40 PM

I need to get all the exhaust and intake valves replaced on my 2000 2.7 Base. All got bent, when it jumped timing because of a broken piece of chain rail.

Anybody know of a good, reasonably priced shop that can check the head and replace the valves, and maybe the guides, that is in either the Bay Area or Sacramento?

tonythetiger · 07-10-2019, 06:26 PM

Send it out, I’m thinking flat6? I never had to go at it, can others weigh in here?

Sent from my iPhone using Tapatalk

Qckslvr · 07-12-2019, 01:59 PM

If you tear down the engine, Victory Machine in San Jose.

We use them at the dealership all the time. Good people, old school machine work.

TNT79Bronco · 07-12-2019, 06:17 PM

Yep. Head is already off and torn down.

TNT79Bronco · 07-13-2019, 11:51 AM

Maybe I should ask.....Can ANY good machine shop do the work on the heads, or does it take some special type of Porsche knowledge to work on these heads? Is head work, head work, no matter the car?

marsheng · 07-13-2019, 03:22 PM

Any head shop can do the job. The problem is, which toolmaker within the shop will do the job.

I had an experience with my Ducai 900 1980. I dropped the goods off, spent 1/2 hr telling the man at the desk how I wanted it done. Drove off and then remembered I had left my cheque book behind. (Was a while ago) Drove back and saw the machinist looking at my head and doing just what I didn't want done. I complained and he gave me my goods back and told me to f... off.

Went home and bought a milling machine. The rest is history as I run a machine shop now.

So the bottom line is, can you trust the person who is doing the job, not necessarly the company. References from others is probably the best way.

SlowernOlder · 07-13-2019, 05:30 PM

ENGINE DYNAMICS

Try these guys.

Topless · 07-14-2019, 07:33 AM

Eeesh. If there was piston contact and bent valves, there is a good chance the rod bearings were also scored during impact. Might be time for a total rebuild to refresh the motor rather than doing the top end now, only to toss a rod later. Food for thought.

thstone · 07-14-2019, 09:25 AM

Bent valves and affordable do not belong in the same sentence. That is major engine damage.

You need to have a top notch shop inspect the ENTIRE engine and provide options. Give BR Racing in Las Gatos a call and if they can't help, they can probably point you in the right direction to someone local who can.

Ask me how I know all of this (I am on Engine #5).

BRR Performance

sfkjeld · 07-18-2019, 01:07 AM

I wouldn’t touch that motor. Buy a rebuilt motor for ~$8k. Or just replace the entire car for about the same. Boxsters have so little value, it doesn’t make economic sense to machine the heads and replace valves. You will wind up in deep and you have no way of knowing if the bottom end was also damaged when the valves were bent. The approach would be different if this were a 911.

78F350 · 07-18-2019, 05:13 AM

I recently pulled a 2001 2.7L that I know has a bad head on the left side. The right may be good. I have only disassembled it as far is this picture:

If you are interested PM me and I can prioritize disassembly to see what I have. The right side is complete/matched, but I am still not sure of the internal condition of the head.

TNT79Bronco · 07-18-2019, 06:37 AM

Thanks all. Maybe a little background is due. I think I might have inadvertently given you a false impression that this car is important to me. It isn’t....I have another 986 and a beautiful 911 that are my “babies”. Here is the story.....

The daughter of the owner was driving the car, when it all of a sudden, “just stopped running”. While the owner had it in the shop, getting diagnosed, he passed away. The wife had it hauled home and it sat for several years. I bought it for $700, knowing it didn’t run and had some type of major issue. Not my first rodeo with a broken M96 engine. I could part it out for more than what I paid for it.

Long story short, it jumped timing because a piece of chain guide broke off and lodged in a the scavenger pump sprocket. Looks like an incomplete previous repair job, because all the guides looked new. Bank 1 valves were bent. Rest of the car was dirty, but in pretty good condition.

The easy thing to do, is drop a replacement engine in, and roll along. I get that, and have an engine I could drop in and make it a nice runner, if that was my goal. I can do all that work myself.

My goal was to see if I could get it running again, with minimal cost, keeping my fingers crossed that no additional internal damage was done. If there is, then so be it. My plan is to get some new valves and head bolts, and roll the dice. I can install the valves, but just wanted input on someone that could replace the guides, if they were bad, or check the head for warpage.

My ultimate goal is to let the widow and her daughter drive the car for a weekend, and then maybe track the car until it dies. I don’t mind throwing a few hundred bucks at it.

Thanks again for all the input.

78F350 · 07-18-2019, 07:23 AM

Here's a diagram since my record on knowing which bank is which is about 50/50.

I think that my 'possibly good' bank is what you need.

TNT79Bronco · 07-18-2019, 01:25 PM

Quote:

Originally Posted by 78F350

Here's a diagram since my record on knowing which bank is which is about 50/50.

I think that my 'possibly good' bank is what you need.

Yep. That’s the one I could use.

78F350 · 07-18-2019, 07:18 PM

That head is removed and it all looks good to me. Here's pics just after it was removed.
Head:

Block:

I'm bringing it to work for a rinse in a parts cleaner, but it's not going to be a professional cleaning.

I am planning to clean and box everything from the head gasket out and estimate shipping to San Ramon, CA.

I assume that the head bolts are one-time, then trash? I've always been more of an engine disassembler than 'rebuilder'.

I want money. ...lots of money and it can be yours.